Water purifier aluminium sulfate industry standards
This standard is applicable to industrial sulfuric acid and bauxite (or aluminum hydroxide) as the raw material of aluminum sulfate, used as a drinking water purifier.Molecular formula: AI2 (SO4) 3 • xH2O.Molecular weight: 342.14 (according to the 1979 international atomic weight. In anhydrous aluminum sulfate).1 technical requirements1.1 appearanceThis product is a block or flake, block size is not more than 15 mm.1.2 project and indicatorsProject indicatorsAlumina (AI2O3), % 15.6 or higherOther metal oxide (with Fe2O3), % 1.0 or lessFree acid conforms to the testWater insolubles, % 0.15 or lessArsenic (As), % 0.0005 or lessHeavy metals (Pb), % 0.002 or less2. The test methodExcept where noted, test reagents used for analysis reagent, water for distilled water or purified water, corresponding solution for aqueous solution.2.1 alumina and other metal oxide content determination2.1.1 principleJoin excessive ethylenediamine tetraacetic acid disodium salt solution and boil, made with aluminum and other metal ions complexation, with xylenol orange as the indicator, use a lead nitrate solution titration of excessive ethylenediamine tetraacetic acid disodium, and boil, then add the potassium fluoride solution resolve with aluminum complex ethylenediamine tetraacetic acid disodium, reoccupy lead nitrate solution titration.2.1.2 equipmentGeneral laboratory instruments and equipment.2.1.3 reagent and solution2.1.3.1 ethylenediamine tetraacetic acid disodium (GB 1401-78) : 0.04 M standard solution. According to 14.9 g the reagents, with a moderate amount of water to dissolve, into 1000 ml volumetric flask, dilute to scale, blending.2.1.3.2 ammonia (GB 631-77) : 1:1 solution.2.1.3.3 hydrochloride (GB 622-77) : 1:1 solution.2.1.3.4 - acetic acid sodium acetate buffer solution (GB 676-78, GB 693-77) : PH 5 ~ 6, said take 200 g sodium acetate, soluble in water, and 30 ml ice acetic acid, diluted to 1000 ml.2.1.3.5 xylenol orange: indicator, 0.5% solution.2.1.3.6 chrome black T (3086-59 HGB) : indicator, according to GB 603-603 preparation preparation methods and product configuration.2.1.3.7 ammonia - ammonium chloride buffer solution armor (GB 631-77, GB 77-631) : the pH value is about 10, according to GB 603-603.2.1.3.8 lead nitrate (HG - 1070-77) : 0.04 M standard solution. According to 13.25 g lead nitrate, soluble in water, add 3 ml ice acetic acid, diluted to 1000 ml.2.1.3.8.1 ethylenediamine tetraacetic acid disodium standard solution of lead nitrate standard solution ratio (volume ratio) measurement:Move to take 25 ml ethylenediamine tetraacetic acid disodium standard solution [2.1.3.1]. Put in 500 ml conical flask, add 15 ml with b - sodium acetate buffer solution (2.1.3.4). With 60 ml water, add 3 ~ 4 drops xylenol orange indicator [2.1.3.5]. With [2.1.3.8] lead nitrate standard solution titration to orange, is the end.2.1.3.8.2 calculationThe ratio of K press type calculation:K = 25 / V (1)Type: V - titration is consumed when the volume of lead nitrate standard solution, mL.2.1.3.9 zinc oxide (GB 1260-77) : 0.04 M standard solution. Said take 3.2552 g (called a quasi to 0.0002 g) via 800 oc burning to constant weight benchmark zinc oxide, put in a beaker, [2.1.3.3] with 40 ml of hydrochloric acid solution, heat to dissolve. After cooling into 1000 ml volumetric flask, dilute to scale, blending.2.1.3.9.1 ethylenediamine tetraacetic acid disodium standard solution calibrationMove 25 ml zinc oxide solution [2.1.3.9], put in 500 ml conical flask, add 65 ml water, ammonia neutralization to pH7 ~ 8 [2.1.3.2], add 10 ml of ammonia - ammonium chloride buffer solution [2.1.3.7], 5 drops chrome black T indicator [2.1.3.6], with ethylenediamine tetraacetic acid disodium [2.1.3.1] standard solution titration to the pure blue.2.1.3.9.2 calculationThe molar concentration of ethylenediamine tetraacetic acid disodium M press type calculation:M = 25 m1 / V (2)Type: when V - titration by ethylenediamine tetraacetic acid disodium the volume of standard solution, mL;M1 - zinc oxide the molar concentration of standard solution.2.1.3.10 potassium fluoride (GB 1271-77) : 10% solution.2.1.4 measurement proceduresAccording to take 10 g (called a quasi to 0.001 g) sample, put in a beaker, add 80 ml water heating dissolved, after cooling out into a 500 ml volumetric flask and diluted to scale, shake, let stand for a moment, immediately move to take 20 ml to 500 ml conical flask, move take 50 ml ethylenediamine tetraacetic acid disodium standard solution [2.1.3.1], add 25 ml of water, boil 3Minutes, add 3 ~ 4 drops after cooling xylenol orange indicator [2.1.3.5], with ammonia [2.1.3.2] or [2.1.3.3] hydrochloric acid solution to orange, add 10 ml - acetic acid sodium acetate buffer solution [2.1.3.4], [2.1.3.8] in lead nitrate standard solution titration to changed from yellow to orange is the end point. Write down the consumed volume (V1), add 15 ml potassium fluoride solution 2.1.3.10 boil for 5 minutes, reoccupy after cooling [2.1.3.8] lead nitrate standard solution titration to the finish line, write down the volume of consumed (V2).2.1.5 representation and calculation results.2.1.5.1 alumina (AI2O3) the percentage of the X1 press type calculation:X1 = 0.05098 V2KM / 20 g / 500 x 100 (3)Type: V2 - the second volume consumption of lead nitrate standard solution titration, mL;K - ethylenediamine tetraacetic acid disodium standard solution for the ratio of lead nitrate standard solution;M - ethylenediamine tetraacetic acid disodium the molar concentration of standard solution;G - referred to in the sample weight, G;0.05098 - every millimoles ethylenediamine tetraacetic acid disodium is equivalent to the amount of AI2O3, g;The difference between the two parallel determination results is not greater than 0.1%.2.1.5.2 with Fe2O3 of thousands of other metal oxide percentage X2 press type calculation:X2 = 0.07985 M (50 - V1K - V2K) / 20 g / 500 x 100 (4)Type: V1 - the first volume of consumption lead nitrate standard solution titration, mL;K - with [2.1.5.1];M - with [2.1.5.1];G -- with [2.1.5.1];0.07985 - every millimoles ethylenediamine tetraacetic acid disodium is equivalent to the amount of Fe2O3, g.2.2 the determination of free acid content2.2.1 principleWith phenolphthalein as indicator, with the potassium hydroxide free acid in standard solution titration test solution.2.2.2 equipmentGeneral laboratory instruments and equipment.2.2.3 reagent and solution2.2.3.1 potassium hydroxide (GB 2306-80) : 0.2 N standard solution, according to GB 601-601 "standard solution preparation method of preparation and calibration.2.2.3.2 sulfate (GB 625-77) : 0.2 N solution.2.2.3.3 phenolphthalein (HGB 3039-59) : indicator, 1% ethanol solution, according to GB 603-603, with potassium hydroxide solution [2.2.3.1] and to pale pink.2.2.3.4 potassium fluoride (GB 1271-77) : about 50% of the solution, according to take 500 g potassium fluoride, add 200 ml contains no dissolved carbon dioxide water, use do not contain carbon dioxide water diluted to 1000 ml. Add 2 ml phenolphthalein indicator [2.2.3.3], with a saturated solution of potassium hydroxide or sulfuric acid to reddish, filter the insolubles (don't washing), storage in plastic bottles.2.2.4 measurement proceduresAccording to take 10 g (called a quasi to 0.01 g) sample, put in a beaker, add right amount water, heat to dissolve, after cooling out into a 500 ml volumetric flask and diluted to scale, blending. Move in 25 ml to 250 ml conical flask, [2.2.3.2] take 10 ml of sulphuric acid solution, add 5 ml of potassium fluoride solution [2.2.3.4] and 4Drops of phenolphthalein indicator [2.2.3.3], [2.2.3.1] with potassium hydroxide standard solution titration to pink (30 seconds not faded) to the finish. At the same time do the blank test with 25 ml water.2.2.5 results saidWhen titration test solution by potassium hydroxide [2.2.3.1] the volume of standard solution shall not exceed the blank value.2.3 water insolubles content determination2.3.1 principleWill dissolve in the water sample, filtering, washing, will insolubles drying and weighing.2.3.2 equipment2.3.2.1 general laboratory instruments and equipment.2.3.2.2's crucible: 20 or 30 ml.2.3.2.3 oven: can control in 105 ~ 110 oc.2.3.3 reagent and solution2.3.3.1 barium chloride (GB 652-78) : chemical pure, 10% solution.2.3.3.2 pickling asbestos (HG - 1062-77) : take a suitable amount of hydrochloric acid pickling asbestos with 6 n boiling for 20 minutes, washed to neutral, then water into a thin paste. Set aside.2.3.4 measurement proceduresWill be loaded on the suction filter bottle's crucible, with thin paste of asbestos in the sieve plate and evenly to each layer (each layer is about 0.3 g dry asbestos). With hot water (the temperature should be higher than the filter test solution) wash until do not contain asbestos in the leaching liquid of hair. Remove the crucible, placed in the oven at 105 ~ 110 oc drying to constant weight.Weigh and 20 g (called a quasi to 0.01 g) sample, put in a beaker, add 100 ml water heating to dissolve, strike in the ancient's crucible has been constant weight filter. Residue with hot water washing to no sulfuric acid root (with barium chloride solution [2.3.3.1] inspection) infection. In the crucible inside the oven in 05 ~ 110 oc dry to constant weight.2.3.5 calculationThe percentage of water insolubles X3 press type calculation:X3 = G1 and G2 / G * 100 (5)Type: G1 - water insolubles and weight of crucible, g;G2 - crucible weight, g;G, sample weight, G;2.4 the determination of arsenic contentAgainst 2.4.1 principleIn acidic solution to potassium iodide, stannous chloride to arsenic reduction for trivalent arsenic, then with zinc granule and acid to produce hydrogen arsenide generated hydrogen gas, with mercury bromide paper absorption, generated from yellow to tan flecks of arsenic and mercury, and arsenic standard colorimetric.2.4.2 for instruments and equipment2.4.2.1 general laboratory instruments and equipment.2.4.2.2 fixed arsenic: the determination of arsenic act in line with the GB 610-57 Chinese 1 requirements.2.4.3 reagent and solution2.4.3.1 hydrochloride (GB 622-77).2.4.3.2 potassium iodide (GB 1272-77) : 15% solution.2.4.3.3 stannous chloride (GB 638-78) : 40% solution. According to GB 603-603.2.4.3.4 without arsenic metal zinc (HGB 3073-59).2.4.3.5 lead acetate cotton: according to GB 603-603.Mercury 2.4.3.6 bromide paper: according to GB 603-603.2.4.3.7 arsenic standard solution: arsenic content of 0.001 mg per milliliter. According to GB 602-77 after the impurity standard solution preparation preparation, diluted 100 times.2.4.4 measurement proceduresAccording to take 5 g sample (called a quasi to 0.01 g), add right amount water to dissolve, out into a 100 ml volumetric flask and diluted to scale, shake well. Move take 20 ml in the arsenic in the bottle. Another move to take 5 ml arsenic standard solution [2.4.3.7] in another arsenic in a bottle and add 20 ml water. To join two separately in arsenic bottle: [2.4.3.1] 6 ml of hydrochloric acid, 5 ml potassium iodide solution [2.4.3.2] and [2.4.3.3] 5 drops of stannous chloride solution, place 10 minutes after shake well, add 2 g without arsenic metal zinc [2.4.3.4] will have installed immediately lead acetate cotton and mercury bromide paper arsenic device installed and plugged, placed in the dark for 1 hour, remove mercury bromide paper. Sample bottles of mercury bromide paper yellow shall not be deeper than the standard.2.5 the determination of heavy metal content2.5.1 principleIn acidic medium, using hydrogen sulphide saturated water to precipitate heavy metals and quantitative comparison with the standard.2.5.2 equipment2.5.3 reagent and solution2.5.3.1 ice acetic acid (GB 676-78) : 30% solution.2.5.3.2 saturated h2s water: according to GB 603-603.2.5.3.3 lead standard solution: a 0.01 mg per milliliter of lead. Ammonium GB 602-602 diluted 10 times after preparation.2.5.3.4 hydroxylamine hydrochloride (HG - 967-67) : 20% solution.2.5.4 measurement proceduresSaid take 10 g (called a quasi to 0.01 g), sample with right amount water to dissolve, dissolve into 100 ml bottle, diluted to scale, shake well. Take 10 mL supernatant liquid, put in 50 mL nessler tube, add 1 take the same color tubes, add 20 mL [2.5.3.3] lead standard solution, respectively (0.5 mL) is added into samples and standard pipe [2.5.3.1] acetic acid solution, 5 mL / 2.5.3.4 hydroxylamine hydrochloride solution, opens the mouth to shake for 10 minutes, add 10 mL water saturated hydrogen sulfide [2.5.3.2], add water to the scale, shake well. In the dark place for 5 minutes, the comparison, pipe shall not be deeper than the standard sample.3 the acceptance rules3.1 water purifier aluminium sulfate by the factory quality inspection department inspection according to the provisions of this standard. The manufacturer shall ensure that all the factory products conform to the requirements of this international standard. Every batch of factory products shall be accompanied by a certificate of quality.3.2 use the unit shall have the right in accordance with the provisions of this standard to check the quality of the water purifier aluminium sulfate received, check whether it conforms to the requirements of this international standard.3.3 sampling method: sample in the delivery of 10% of the total number of bags, if the total number of less than 50 bags, select the number of bags should not be less than 5 bags. Sampling should be removed from 150 mm thick surface of aluminum sulfate, with clean, dry aluminum sampler sampling from the depths of mouth center vertical insert 1/2. A total of sampling shall not be less than 2 kg. Will select the sample carefully blending to classified to 1 kg, quartering repackaging in two clean, dry glass bottles of belt grinding plug. A label on the bottle indicate: factory said, product name, production date and sampling date. Bottle used for inspection, add a bottle of seal save (save three months).3.4 test results such as a indicators do not meet the requirements of this standard, should be back from two times the amount of packaging in the sampling inspection. To test the results, even if there is an indicator does not conform to the requirements of this standard, the whole batch of products can't acceptance.3.5 when supply and demand both sides in product quality objection, shall be settled by the arbitration unit.4 packing, marking, storage and transportation4.1 water purifier aluminium sulfate with inner polyethylene coated or woven bag lined with polyethylene bag packaging, bags of 50 kg net each.4.2 on the outer packing should be accompanied by the following symbol: product name, net weight, production factory name, the standard number and indicate the trademark of the product. Should also be coated with clear and strong "gain".4.3 water purifier aluminium sulfate should prevent the pollution of toxic substances when stored and be affected with damp be affected with damp.Additional instructions:This standard put forward by food additives standardization technology committee, tianjin by chemical chemical industry research institute and Chinese academy of medical sciences, food hygiene inspection under centralized.This standard by chemical tianjin chemical research institute and xuzhou city health epidemic prevention station responsible for drafting.This standard main writer guo Chang Zhen, with instrument, Lin Size
Chemical water treatment agent industry standard of the People's Republic of China aluminum sulfate
The top of the form1 topic content and scope of applicationThis standard specifies aluminium sulfate treatment for the technical requirements, test methods, inspection rule and marks, packaging, transport and storage requirements.This standard is suitable for water treatment aluminium sulfate (solid, solution). This product is mainly used for drinking water and industrial water treatment.Molecular formula: Al2 (SO4) 3 · H20Relative molecular mass [Al2 (SO4) 3 meter] : 342.15 (in 1987 the international relative atomic mass)2 reference standardGB19l packaging graphic symbolGB601 chemical reagent titration analysis (capacity) in the preparation of standard solutionGB602 chemical determination of impurities in the preparation of standard solutionGB603 chemical reagent test method used in the formulation and preparation of productsGB6l0. 1 arsenic chemical reagent use-general method (arsenic spot method)GB3049 chemical products general method for the determination of iron content in adjacent phenanthroline spectrophotometric methodGB6678 chemical products sampling conditions3 technical requirements3.1 appearance: solid product is white or microstrip gray granular or massive. For micro, gray green or micro solution products.3.2 water treatment agent aluminium sulfate should conform to the requirements of the table l.Table 1 Indicators projectIndicators projectsolidsolutionGrade aNonconforming productAl2O3 content,%≥15.6015.607.8Fe content,%≤0.520.700.25Water content,%≤0.150.150.15pHvalue(1%Aqueous solution),≥3.03.03.0As content,%≤0.00050.00050.0003Heavy metal(Pb)content,%≤0.0020.0020.0014 test methodReagents and water used in this standard, when did not indicate the other requirements, refers to the analytical reagent and distilled water or equivalent purity of the water.Tests required standard solution, standard solution, preparation of impurities and products, without indicate the other provisions, all press GB601, GB602, the provisions of GB603 preparation.4.1 the determination of alumina content4.4.1 methods feedAluminum in a sample with known excessive ethylenediamine tetraacetic acid disodium reaction, generate complex. When pH is about 6, with xylenol orange as the indicator, with zinc standard titration solution titration of excessive ethylenediamine tetraacetic acid disodium.4.1.2 reagents and materials4.1.2.1 sodium acetate (GB693) solution: 272 g/L;4.1.2.2 zinc chloride (HG3-947) standard titration solution: c (ZnCl2) 0.02 mol/L;4.1.2.3 ethylenediamine tetraacetic acid disodium salt (EDTA) (GB1401) standard titration solution: c (C10H14O8N2Na2) is about 0.05 mol/L.4.1.2.4 xylenol orange: 2 g/L solution;4.1.3 analysis stepsSay about 5 g of solid sample or sample 10 g solution, accurate to 0.0002 g, put in 250 ml beaker, with about 100 ml water heating to dissolve (filtering) when necessary, after cooling, all transfer into 500 ml volumetric flask and diluted to scale, shake well.With a pipette 20 ml of the test solution, in a 300 ml conical flask. With a pipette to join 20 mledta standard titration solution, boil 1 min, add 5 ml of sodium acetate solution after cooling and 2 xylenol orange indicator drops. With zinc chloride standard titration solution titration to pale pink.At the same time do a blank test.4.1.4 analysis resultsTo the quality expressed as percentage content of alumina (Al2O3) X1 calculated by type (1) :X1 = 0.05098 (where V0 - V)/c (m (20/500) x 100-0.9128 - X2(where V0 - V) = 127.5 c/m - 0.9128 - X2........................ (1)Type: c - the actual concentration of zinc chloride standard titration solution, mol/L;Where V0 one by one blank test consumed zinc chloride standard titration solution volume, mL;V - a test solution consumed zinc chloride standard titration solution volume, mL;M sample quality, g;Article 4.2 X2 - a measure of the content of iron (Fe), %;0.05098 - and 1.00 mL ethylenediamine tetraacetic acid disodium standard titration solution (C10H14O8N2Na2) = 1.000 mol/L [c] quite, to the quality of the alumina (Al2O3) said;0.9128 one iron (Fe) conversion into alumina (Al2O3) coefficient.The results should be said to two decimal places.4.1.5 allow poorThe difference between the two parallel determination results is not more than 0.15%, take the arithmetic mean as the determination results.4.2 the determination of iron content2 way to feedWith GB3049 article 2.4.2.2 reagents and materialsWith GB3049 article 3.Holdings instruments and equipment4.2.3.1 spectrophotometer: absorption cell with a thickness of 1 cm.4.2.4 working curve drawingAccording to the provisions of the article 5.3 of the GB3049 use 1 cm iron absorption cell and the corresponding standard solution dosage, working curve drawing.4.2.5 analysis steps4.2.5.1 test solution preparationSaid about 3 g or 5 g sample solid solution sample, accurate to 0.01 g, put in 250 ml beaker, add 100 ml water and 2 ml of hydrochloric acid (1 + 1), heat dissolved and boil 5 min, after cooling all transfer into 500 ml volumetric flask and diluted to scale, shake well.4.2.5.2 blank test solution preparationAdd 100 ml to 250 ml beaker of water and 2 ml of hydrochloric acid (1 + 1), heat and boil 5 min, after cooling all transfer into 500 ml volumetric flask and diluted to scale, shake well.Determination of 4.2.5.3Move with a pipette 5 ml test solution (4.2.5.1) and 5 ml (4.2.5.2), blank test solution, respectively, in the 100 ml beaker. According to provisions of article 5.4 of the GB3049 below, from "when necessary, add water to 60 ml......" To begin operations.4.2.6 analysis resultsTo the quality expressed as percentage content of iron (Fe) X2 calculated by type (2) :X2 = (- m0, m1)/(1000 m * 1000 * 5/500) = 10 (m1 - m0)/m........................ (2)Type: m1 one by one according to the measured absorbance test solutions, find out from the working curve of iron content, mg;M0 one by one according to the measured the absorbance of the blank test solution, find out from the working curve of iron content, mg;M - sample quality, g.The results should be said to two decimal places.4.2.7 allow poorThe difference between the two parallel determination results is not more than 0.03%, take the arithmetic mean as the determination results.4.3 water insolubles content determinationThis method is the feedWater to dissolve sample, with the crucible type filter, the dry residue after weighing.4.3.2 reagents and materials4.3.2.1 barium chloride (BaC12 · 2 h2o) (GB652) solution: 100 g/L.4.3.3 instruments and equipment4.3.3.1 crucible filter: filter plate aperture is 5 ~ 15 microns.4.3.4 analysis stepsAccording to take about 20 g sample, accurate to 0.01 g, put in 250 ml beaker, add 100 ml water, heat to dissolve. Strike with in 105 ~ ll0 ℃ drying to constant weight of crucible type filter, wash in hot water until no sulfuric acid root ion (with barium chloride solution test) in 105 ~ ll0 ℃ under dry to constant weight.4.3.5 analysis resultsExpressed in weight percent of water insolubles content according to the type (3) :X3 = (m2 - m1)/m x 100.......................................... (3)Type: m1 - crucible filter quality, g;M2 a monohydrate insolubles and crucible filter quality, g;M sample quality, g.The results should be said to two decimal places.4.3.6 allow poorThe difference between the two parallel determination results is not more than 0.02%, take the arithmetic mean as the determination results.The determination of pH 4.44.4.1 methods feedSample is dissolved in water, with a glass electrode and calomel reference electrode of the pH of the solution acidity meter measurement test.4.4.2 instruments and equipment4.4.2.1 acidity meter: dividing value is 0. LpH units, equipped with glass measuring electrode and saturated calomel reference electrode.4.4.3 analysis stepsSaid to take 1.00 + 0.01 g sample, put in 100 ml beaker, add 50 ml contains no dissolved carbon dioxide water, all transfer into 100 ml volumetric flask, use do not contain carbon dioxide water diluted to scale, shake well. Test the pH of the solution is measured with a pH meter.The results obtained shall be said to a decimal.4.4.4 allow poorThe difference between the two parallel determination results is not more than 0.2 pH unit, take the arithmetic mean as the determination results.4.5 the determination of arsenic content4.5.1 methods feedIn acid medium, metal zinc will arsenic reduction for hydrogen arsenide. Hydrogen arsenide evolution of mercury in tan arsenic spot is formed on the test paper, comparing with standard arsenic spot.4.5.2 of reagents and materials4.5.2.1 hydrochloride (GB622);4.5.2.2 potassium iodide (GB1272);4.5.2.3 arsenic-free zinc (GB2304);4.5.2.4 stannous chloride (GB638) solution: 400 g/L;4.5.2.5 arsenic standard solution: 0.0010 mgAs/mL. After press GB602 preparation, use pipette moves take 10 ml, put in 1000 ml volumetric flask, diluted to scale, shake well.4.5.2.6 lead acetate cotton;Mercury 4.5.2.7 bromide paper.4.5.3 instruments and equipment4.5.3.1. Fixed arsenic: according to the specified in the GB6l0 figure l device.4.5.4 analysis stepsSaid to take about 5 g sample, accurate to 0.0 lg, dissolves, all transfer into 100 ml volumetric flask and diluted to scale, shake well.With a pipette 20 ml test solution, put in jars. Add 5 ml of hydrochloric acid, potassium iodide 1 g and 5 drops of stannous chloride solution, shake well placed after 10 min. Add 2 g no zinc, arsenic will have installed immediately lead acetate cotton and mercury bromide paper glass tube is installed and plugged. Placed under 25 ~ 30 ℃ in the dark for 1 h. Remove mercury bromide paper, the color shall not be deeper than the standard.Standards are: for solid aluminum sulfate, using pipette 5 ml arsenic standard solution; For aluminium sulfate solution, with a pipette moves take 3 ml arsenic standard solution, add water to 20 ml, with the test solution at the same time.4.6 the determination of heavy metal content4.6.1 methods feedIn acidic medium, heavy metal ions react with hydrogen sulfide solution, the solution is tan, comparing with standard solution.4.6.2 reagents and materials4.6.2.1 ice acetic acid solution (GB676) : 1 + 2 solution.4.6.2.2 saturated h2s water: current chef;4.6.2.3 hydroxylamine hydrochloride solution (HG3-967) : 200 g/L;4.6.2.4 lead standard solution: 0.0 l0mgPb/mL, take according with pipette GB602 preparation before removing 10 mL, put in 100 mL volumetric flask, diluted to scale, shake well.4.6.3 instruments and equipment4.6.3.1 colorimetric tube: 50 ml.4.6.4 analysis stepsSay about 5 g of solid sample or sample 10 g solution, accurate to 0.0 lg, put in 250 ml beaker, add right amount water to dissolve, all transfer into 100 ml volumetric flask and diluted to scale, shake dry filter (necessary).Use pipette to move 20 mL test solution, put in 50 mL colorimetric tube, add 0.5 mL of acetic acid solution, 5 mL of hydroxylamine hydrochloride solution, opening shaking 10 min, add 10 mL of saturated hydrogen sulphide water, add water to the scale, shake well. Test solution assumes the color may not be deeper than the standard.Standard is: use pipette to move 2 ml lead standard solution, and the sample at the same time.5 inspection rules5.1 water treatment agent aluminium sulfate by quality supervision and inspection department of factory inspection according to the provisions of this standard. Manufacturer shall ensure that all water treatment aluminium sulfate factory conform to the requirements of this international standard. Every batch of factory products shall be accompanied by a certificate of quality, include: name of the manufacturer, product name, rank, batch number, net weight, production date, product quality and the standard of the evidence of compliance with this standard number.5.2 using unit shall have the right to according to the provisions of this standard to the received water treatment agent aluminium sulfate for acceptance. Acceptance shall be the date of arrival of the goods within 15 days.5.3 each batch products weight not exceeding 100 t. Solution product tank, a tanker as one batch.According to provisions of article 6.6 of the GB6678 5.4 determine the number of sampling units,Solid product sampling, first remove the bags about 30 cm of the upper material layer, using the sampling tool to take samples of not less than 100 s, samples from which will quickly broken below about 10 mm, blending. According to the method of four points are classified to about 500 g, partial shipments in two clean, dry and belt grinding plug in the jar, sealed, paste the label on the bottle. Indicate: factory name, product name, grade, batch number, date of sampling and sample name, bottle used for inspection, another bottle of save for future reference of 3 months.Bulk solution product sampling, use sampler from top, middle and lower three layers according to 1:3:1 sampling. With tanker loading, with sampler inlet from the top, middle and lower parts according to 1:3:1 sampling. At the top can't sampling and the material is uniform, but in the discharging mouth of the tanker samples. The specimen shall be not less than 500 ml. After blending, in a clean, dry glass bottle, paste the label on the bottle. Indicate: factory name, product name, grade, batch number and date of sampling, inspection department.5.5 if the test result was a indicators do not meet the requirements of this standard, should be back from two times the amount of packaging in the sampling check, check the result even if only one of indicators do not meet the requirements of this standard, the whole batch of products can't acceptance.5.6 when supply and demand both sides dispute occurs, the quality of product in accordance with the interim measures for the national product quality inspection arbitration provisions.6 marks, packaging, transport and storage6.1 packaging containers should have a sign of strong, clear, indicate: name of the manufacturer, product name, rank, net weight, batch number or production date, trademarks and the standard number.Liquid products shall, in accordance with the provisions of xu brush GB19l (figure 3) sign up,6.2 water treatment agent aluminium sulfate (solid) in plastic woven bag lined with polyethylene plastic bags or composite plastic woven bag packing. Each bag net weight 50 kg.Water treatment agent of aluminium sulfate solution with FRP tank or plastic (net weight of 25, 30 or 35 kg) packaging.6.3 the goods transportation, prevent toxicant pollution and be affected with damp be affected with damp.6.4 this product should be stored in ventilated dry place, prevent the rain be affected with damp be affected with damp,Additional instructions:This standard by the ministry of chemical industry of the People's Republic of China, slurry sampling is proposed.This standard by the ministry of chemical industry in tianjin chemical industry research institute and Chinese academy of preventive medicine under centralized by environmental health monitoring.This standard by the ministry of chemical industry in tianjin chemical research institute is responsible for drafting.Main drafter of this standard Zhou Qiaoe, XingYuFen.With reference to this standard by the American association of tap water standard ANSI/AWWAB403-82 aluminum sulfate - liquid, granular and lump.Since the date of implementation of this standard. The original national standard GB3l5l - 82 "water purifier aluminium sulphate"Form the bottom of the
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