摘要
研究了在ＫＨ２ＰＯ４Ｎａ２Ｂ４Ｏ７缓冲介质中，痕量镍催化Ｈ２Ｏ２氧化胭脂红褪色的指示反应及动力学条件，测定了反应活化能，建立了动力学光度法测定痕量镍的新方法。方法检出限为２４０×１０－８ｇ／Ｌ，测定范围为００８～２４μｇ／Ｌ。结合丁二酮肟正丁醇萃取分离，实现了对铝合金标样中痕量镍的测定，ＲＳＤ（ｎ＝６）小于３％。
A new catalytic spectrophotometric method for determination of trace nickel has been developed. The method is based on the fact that Ni(Ⅱ) catalyzes the decolorization reaction of carmine oxidized by H 2O 2 in KH 2PO 4 Na 2B 4O 7 buffer solution. The reaction dynamics is studied and the apparent activation energy is determined. The detection limit for Ni(Ⅱ) is 2 40×10 -8 g/L with dynamic linear range of 0.08～24 μg/L. Combined with solvent extraction separation, the method has been applied to determine trace nickel in aluminum alloys with satisfactory results.
出处
《岩矿测试》
CAS
CSCD
北大核心
1996年第4期279-282,共4页
Rock and Mineral Analysis
基金
煤炭青年科学基金
关键词
胭脂红
镍
催化光度法
catalytic spectrophotometry, nickel, carmine
