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AnalaR Standards 1283
Preparation of Standard Comparison Solutions 291292
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0-oo1 per cent acetic acid acid and heat acid and ignite add 1 ml Alkalis allow to stand ammonium thiocyanate ammonium thiocyanate solution amyl acetate amyl alcohol AnalaR Arsenic As2O3 Assay.—Dissolve barium chloride solution carbon dioxide-free water chloric acid Chloride.—Dissolve 1 g clear colourless solution cool crystalline powder defined in appendix described in appendix dilute ammonia solution dilute hydrochloric acid dilute nitric acid dilute sulphuric acid filter heat to boiling Heavy Metals Pb ignite gently Impurities Chloride Iron Fe Iron.—Dissolve 1 g Limits of Impurities Maximum Limits Metals and Iron.—Dissolve methyl red minutes n/1 per cent Nessler's reagent opalescence pass hydrogen sulphide phenolphthalein phosphate reagent potassium cyanide potassium iodide silver nitrate solution sodium hydroxide Solubility.—Dissolve 5 g solution 1 ml solution and allow solution and pass standard colours standard stain stannous chloride Sulphate SO4 Sulphate.—Dissolve 1 g titrate with N/1 turbidity or precipitate water and add water and titrate