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铬偶氮酚KS[2-(2-羟基-3-羧基-5-磺基苯偶氮)-1,8-二羟基萘-3,6-二磺酸的三钠盐,简称CALKS],是光度法测定铝的新显色剂,已用于钢铁、铜合金中铝的测定。在含有适量乙醇的Al-CALKS体系中,加入溴化十六烷基吡啶(CPB),由于三元络合物的形成而使灵敏度急剧提高,摩尔吸光系数达1.02×10~5,成为光度法测定铝的高灵敏度和高选择性的方法。但是铬偶氮酚KS与其他
Trisodium salt of 2- [2- (2-hydroxy-3-carboxy-5-sulfophenylazo) -1,8-dihydroxynaphthalene-3,6-disulfonic acid, abbreviated as CALKS] Is the determination of aluminum photometric method of the new reagent has been used for steel, copper alloy aluminum determination. Al-CALKS system containing appropriate amount of ethanol, cetyl pyridinium bromide (CPB), due to the formation of ternary complex so that the sharp increase in sensitivity, the molar absorption coefficient of 1.02 × 10 ~ 5, a photometric method Determination of aluminum high sensitivity and high selectivity of the method. However, azocarbophenol KS and others