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前言匈牙利分析化学家薩約(Sajó)創立了用EDTA(乙二胺四乙酸)络合溶液中Al~(+++)及其他离子,然后用F~-来取代与Al~(+++)絡合的EDTA,在pH5-5.6之间用鋅盐来回滴取代的那部分EDTA,所用的指示剂为铁氰化物-联苯胺体系。該方法已在我国分析化学领域中普遍推广。
Preface Hungarian analytical chemist Sajó founded the complexation of Al ~ (+++) and other ions in EDTA (ethylenediaminetetraacetic acid) and then F ~ - substitution for Al ~ (+++) ) Complexed EDTA, and the portion of EDTA that was substituted drop-wise with a drop of zinc between pH 5 and 5.6 was used as the indicator for the ferricyanide-benzidine system. This method has been widely popularized in the field of analytical chemistry in our country.