摘要
研究了在氨水介质中，痕量镍（Ⅱ）催化高碘酸钾氧化吖啶红和靛蓝胭脂红褪色的指示反应，通过测量530nm和610nm处催化反应体系和非催化反应体系吸光度的变化，建立了双波长双指示剂催化动力学光度法测定痕量镍的新方法。在最佳实验条件下，镍的质量浓度在0～0．04μg／mL范围内与△A存在线性关系（△A＝△A530＋△A610），线性方程为△A＝17．10ρNi^2＋（μg／mL）～0．0011，r=0．9972，方法检出限为0．061μg／L。该方法用于合金中痕量镍的测定，与标准样品含量基本一致。
A new dual-wavelength dual-indicator catalytic kinetic spectrophotometric method for the determination of trace nickel Ⅱ） was studied. This method was based on the fact that Ni^2＋ can catalyze the oxidation of acridine red and indigo carmine by KIO4 in NH3 · H2O solution. The absorbance of the catalytic and uncatalytic systems at 530 nm and 610 nm were measured. Under the optimum conditions, the mass concentration of nickel in the range of 0-0. 04 μg/mL showed a linear relationship with △A（△A= △A530＋△A610 ）. The linear regression equation was △A= 17. 10 ρNi^2＋（μg/mL）-0.0011 with correlation coefficient of 0. 997 2, and the detection limit was 0. 061 μg/L The method had been applied to determine trace Ni^2＋ in alloy samples,and the results were blasically consistent with that of standard sample.
出处
《冶金分析》
CAS
CSCD
北大核心
2009年第6期47-49,共3页
Metallurgical Analysis
基金
鲁东大学科研基金(L20082901)
关键词
催化光度法
镍
双波长
双指示剂
吖啶红
靛蓝胭脂红
高碘酸钾
catalytic sepectrophotometry
nickel
dual-wavelength
dual-indicator
acridine red
indigo carmine
potassium periodate
