丁二酮肟分光光度法测定不锈钢中镍
胡沈会,徐烨璘,杨伟侠,陈萍,姜浩晖,沈源
浙江国检检测技术股份有限公司,浙江海盐 314300
Determination of nickel in stainless steel by dimethylglyoxime spectrophotometry
胡沈会,徐烨璘,杨伟侠,陈萍,姜浩晖,沈源
ZheJiang GuoJian Testing and Technology Co., Ltd., Haiyan 314300, China
摘要:建立丁二酮肟分光光度法测定不锈钢中镍的方法。样品经盐酸-硝酸-水(体积比为1∶1∶1)溶液溶解,高氯酸冒烟。在氨性条件下,以碘-碘化钾为氧化剂,使Ni4+与丁二酮肟生成可溶性的酒红色络合物,于530 nm波长处测量吸光度。结果表明,镍的质量分数在0%~14%范围内与吸光度具有良好的线性关系,线性相关系数为0.999 2,检出限为0.01%。用所建方法对3个不锈钢标准样品进行测定,测定结果的相对标准偏差为0.14%~0.26%(n=10),相对偏差为-0.62%~-0.39%。该方法分析速度快,成本低,操作简单,测量结果准确可靠,满足日常分析要求。
Abstract:A method for the determination of nickel in stainless steel by dimethylglyoxime spectrophotometry was established. The sample was dissolved in hydrochloric acid-nitric acid-water solution(volume ratio 1∶1∶1), and perchloric acid smoked. Under the condition of ammonia, using iodine potassium iodide as oxidant, Ni4+ and dimethylglyoxime form a soluble wine red complex. The absorbance was measured at 530 nm. The results showed that the nickel content had a good linear relationship with the absorbance in the range of 0%-14%, the linear correlation coefficient was 0.999 2, and the detection limit was 0.01%. The method was applied to the determination of three stainless steel standard samples, the relative standard deviation of the determination results was 0.14%-0.26%(n=10), and the relative deviation was from -0.62% to -0.39%. This method has the advantages of fast analysis speed, low cost, simple operation, accurate and reliable measurement results, which can meet the requirements of daily analysis.
关键词:不锈钢;丁二酮肟;光度法
Keywords:stainless steel; dimethylglyoxime; photometry
本文引用格式:
胡沈会,徐烨璘,杨伟侠,等.丁二酮肟分光光度法测定不锈钢中镍[J].化学分析计量,2020,29(6):113-116.
HU S H,XU Y L,YANG W X,et al. Determination of nickel in stainless steel by dimethylglyoxime spectrophotometry[J]. Chemical analysis and meterage,2020,29(6):113-116.
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