| 双波长K系数分光光度法测定镍钨合金镀液中的钨含量 |
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| 引用本文： | 陈海春. 双波长K系数分光光度法测定镍钨合金镀液中的钨含量[J]. 材料保护, 2012, 45(5): 75+77+88 |
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| 作者姓名： | 陈海春 |
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| 作者单位： | 沈阳理工大学环境与化工学院,辽宁沈阳,110159 |
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| 摘 要： | 以NH4SCN方法测定镍钨合金镀液中的钨含量,镀液中的Ni2+会对其产生干扰。应用双波长K系数分光光度法有效消除了共存Ni2+的影响。测定镍钨合金镀液中的钨时以420 nm为测量波长、370 nm为参比波长,钨的线性回归方程为y=0.426 0x+0.982 3,相对标准偏差为1.2%,加标回收率为96.89%～106.10%。此法用于镍钨合金镀液中钨含量的测定,结果准确。
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| 关 键 词： | 钨含量测定 镍钨合金镀液 分光光度法 双波长K系数 NHSCN |
Determination of Tungsten in Nickel-Tungsten Alloy Plating Bath by Dual-Wavelength K Coefficient Spectrophotometric Method |
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| CHEN Hai-chun. Determination of Tungsten in Nickel-Tungsten Alloy Plating Bath by Dual-Wavelength K Coefficient Spectrophotometric Method[J]. Journal of Materials Protection, 2012, 45(5): 75+77+88 |
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| Authors: | CHEN Hai-chun |
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| Affiliation: | CHEN Hai-chun(School of Environmental and Chemical Engineering,Shenyang Ligong University,Shenyang 110159,China) |
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| Abstract: | W in Ni-W alloy electroplating bath was determined at a monitoring wavelength of 420 nm and a reference wavelength of 370 nm when dual-wavelength K coefficient spectrophotometric method was adopted to resolve the common problem(the interference of coexisting Ni2+) existed in traditional method of W determination(NH4SCN method).It was found that the regression equation for determination of W could be expressed as y = 0.426 0x + 0.982 3.The relative standard deviation was 1.2%,and the recoveries in relation to standard addition were 96.89%~106.10%.The established method could be used to accurately determine concentration of tungsten in Ni-W alloy electroplating bath. |
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| Keywords: | determination of W Ni-W alloy electroplating bath spectrophotometry dual-wavelength K coefficient NH4SCN |
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