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在测定含有大量铅和氟硅酸的铅电解液中氨基酸时,本文用EDTA络合水解离子,溶液中的氢离子先用氢氧化钠中和,然后加入甲醛使之与氨基酸反应生成羧酸,继用氢氧化钠标准溶液滴定。在滴定液中,至少500毫克铅、氟硅酸、乙酸、六次甲基四胺,200毫克氢氟酸、硫酸、盐酸,10毫克铜、铋、锌,2毫克砷、锑、锡、铁,对测定均无干扰。与铵及胺有类似反应干扰测定,使结果偏高。
In the determination of lead containing a large number of lead and fluosilicate electrolyte electrolyte, the paper with EDTA complex hydrolysis of ions, the solution of hydrogen ions first neutralized with sodium hydroxide, and then add formaldehyde to react with amino acids to form carboxylic acid, Following the titration with sodium hydroxide standard solution. In the titration solution, at least 500 mg of lead, fluosilicate, acetic acid, hexamethylenetetramine, 200 mg of hydrofluoric acid, sulfuric acid, hydrochloric acid, 10 mg of copper, bismuth, zinc, 2 mg of arsenic, antimony, tin, , No interference on the determination. Similar reaction with ammonium and amine interfere with the determination, the result is high.