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一、引言铝的比色测定方法很多,主要有8-羟基喹啉、茜素红S、毛铬青R、菧唑、铝试剂、邻苯二酚紫、二甲基酚橙、苏木精等比色法。其中8-羟基喹啉比色法由于具有简便、灵敏、稳定以及空白值较低等优点,而得到了十分广泛的应用。以8-羟基喹啉比色法测定铝时,Fe、Co、Ni、F等均将引起严重的干扰。一般在pH=9的条件下,以EDTA和氰化钾作掩蔽剂来提高8-羟基喹啉的选择性。但由于氰化钾具有剧烈的毒性,使该法在实际应用上受到了很大的限制。以8-羟基喹啉法测定金属钙、镁和
First, the introduction of aluminum colorimetric determination of many ways, there are 8-hydroxyquinoline, alizarin red S, Mao Chromin R, pyrazole, aluminum reagent, catechol purple, dimethyl phenol orange, hematoxylin Colorimetric method. Among them, 8-hydroxyquinoline colorimetric method has been widely used due to its advantages of simplicity, sensitivity, stability and low blank value. When 8-hydroxyquinoline colorimetric determination of aluminum, Fe, Co, Ni, F, etc. will cause serious interference. Generally at pH = 9 conditions, with EDTA and potassium cyanide as a masking agent to improve the 8-hydroxyquinoline selectivity. However, due to the violent toxicity of potassium cyanide, this method has been greatly restricted in practical application. Determination of metal calcium, magnesium and 8 - hydroxyquinoline method