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目前在分析化学領域中,氨羧酸絡合剂的应用日趋扩大,在药物分析方面曾有不少报导。我室在快速分析中亦应用乙二胺四乙酸于鋁、汞、鉛、鉍、錳鹽等的分析上。据文献三价铁鹽可在酸性情况(pH=2.0)下以磺酸水揚酸及鄰苯二酚3,5-二磺酸鈉为指示剂可进行直接滴定。本法較中国药典三价鉄鹽項下的含量测定方法手續簡便,在稀濃度鈇鹽溶液的測定中,其准确度尚能滿足快速分析的要求,故我室曾在鉄鹽分析上应用本法,唯在滴定所用的指示剂
Currently in the field of analytical chemistry, the use of amino acid complexing agent is expanding, many reports in the field of drug analysis. My room in the rapid analysis also applies ethylenediaminetetraacetic acid in the analysis of aluminum, mercury, lead, bismuth, manganese salts. According to the literature, trivalent iron salts can be directly titrated with salicylic acid and catechol sodium 3,5-disulfonate as an indicator under acidic conditions (pH = 2.0). This method is simpler than the Chinese Pharmacopoeia trivalent salt content determination method is simple, in the determination of dilute concentration of salt solution, the accuracy of the analysis can still meet the requirements of rapid analysis, , Only the indicator used in titration