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投稿时间:2017-12-17 修订日期:2018-01-03
投稿时间:2017-12-17 修订日期:2018-01-03
中文摘要: 在25 mL反应体系中加入硫酸-盐酸混合酸(H2SO4:1.0mol/L,HCl:5.0mol/L)3.0 mL,0.05mol/L 碘酸钾溶液3.0mL,0.50 g/L胭脂红溶液1.5 mL,微量镓对碘酸钾氧化胭脂红的褪色反应有良好的催化作用,建立了测定地质样品中微量镓的催化分光光度法。该方法的线性范围在0~100μg /L之间,工作曲线的线性方程为?A=2.369 CGa 0.2236(相关系数r=0.9996),检出限(3S/N)为1.0×10-3μg /mL。方法应用于地质标准样品中微量镓的测定(分别是岩石标样GBW07120和水系沉积物标样GBW07301a),测定值与认定值相符,测定值相对标准偏差( n=6)均小于5﹪,结果满意。
Abstract:The author has studied the catalytic spectrophotometric method for the determination of trace Gallium in Geological Samples. This method based on the catalytic effect of trace Gallium on discoloring reaction of carmine oxidized by potassium iodate in the 25 mL reaction system. The mixture of sulfuric acid and hydrochloric acid solution. (H2SO4:1.0mol/L, HCl:5.0mol/L) 3 mL, 0.05mol/L potassium iodate solution 3.0mL, 0.50 g/L carmine solution 1.5 mL were added. The linear range of this method was 0~100μg /L for Gallium . The linear equation was ?A=2.369 CGa 0.2236 (r=0.9996)and the detection limit (3S/N)was 1.0×10-3μg /mL. The method was applied to the determination of trace Gallium in geological standard samples(rock standard sample GBW07120 and water system sediment sample GBW07301a), were consistent with the certified values, values of the relative standard deviation (RSD)(n=6) were less than 5﹪ with satisfactory results.
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作者 | 单位 | |
乐淑葵* | 江西省地质调查研究院测试所 南昌 330030 | leshukui@163.com |
Author Name | Affiliation | |
leshukui | Jiangxi Provincial Institute of Geological Survey | leshukui@163.com |
引用文本:
乐淑葵.催化分光光度法测定地质样品中微量镓[J].中国无机分析化学,2018,8(3):12-15.
leshukui.Catalytic photometric method Determination of Trace Gallium in Geological Samples[J].Chinese Journal of Inorganic Analytical Chemistry,2018,8(3):12-15.
乐淑葵.催化分光光度法测定地质样品中微量镓[J].中国无机分析化学,2018,8(3):12-15.
leshukui.Catalytic photometric method Determination of Trace Gallium in Geological Samples[J].Chinese Journal of Inorganic Analytical Chemistry,2018,8(3):12-15.