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采用分光光度法测量了锌－铁－磷合金镀层中的铁含量。阐述了该方法的原理，分析了影响测量结果的各因素，并对铁进行了回收试验，铁的回收率达９０％以上。表明该方法准确可靠
The iron content in zinc-iron-phosphorus alloy coatings was measured by spectrophotometry. The principle of this method is expounded. The factors influencing the measurement results are analyzed. The iron recovery test is carried out. The recovery rate of iron is above 90%. It shows that the method is accurate and reliable