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铜合金中钴的测定,方法有:亚硝基R盐光度法、PAN-Tritonx-100光度法、5-Br-PADAAP光度法等。这些方法,灵敏度不高。应用3.5-二溴PADAT光度法测定钴,灵敏度高,摩尔吸光系数达10_(?)~s,尤其是在PADAT类试剂的苯环上引入甲基后,允许较大量铁的存在,而不影响钴的测定。但未见应用于铜合金中钴的测定。本文在文献[4]的基础上,试验了用3.5-二溴PADAT光度法测定铜合金中的钴。采用磷
Determination of cobalt in copper alloys, methods are: nitroso R salt photometry, PAN-Tritonx-100 spectrophotometry, 5-Br-PADAAP spectrophotometry. These methods, the sensitivity is not high. The determination of cobalt with 3.5-dibromo-PADAT spectrophotometry has high sensitivity and molar extinction coefficient of 10 ~ (?) ~ S, especially the introduction of methyl on the phenyl ring of PADAT reagent, which allows the presence of a large amount of iron without affecting Determination of cobalt. But no application in the determination of cobalt in copper alloys. Based on the literature [4], this paper tested the determination of cobalt in copper alloy by 3.5-dibromo-PADAT spectrophotometry. With phosphorus