电感耦合等离子体发射光谱法测定土壤中总铬负干扰分析  

An Analysis of Negative Interference in the Determination of Total Chromium in Soil by ICP-OES

作　　者：刘榜城 张金湖 谭冯茂 Liu Bangcheng;Zhang Jinhu;Tan Fengmao(Shanghai Liyuan Environmental Testing Co.,Ltd.,Shanghai 201114;Shanghai Weizheng Testing Technology Co.,Ltd.,Shanghai 201619)

机构地区：[1]上海利元环保检测技术有限公司,上海201114 [2]上海威正测试技术有限公司,上海201619

出　　处：《上海环境科学》2018年第4期181-184,共4页Shanghai Environmental Sciences

摘　　要：对浓度相同的不同基体,用电感耦合等离子体发射光谱测定铬（4 mg/L）,发现：盐酸、高氯酸有负干扰。随着盐酸基体浓度（1%～5%）的增加产生的负干扰也增大,高氯酸基体浓度（1%～5%）产生的负干扰趋于恒定。高氯酸在加入4 mg/L铬溶液时产生的负干扰为0.5 mg/L左右。加入抗坏血酸与乙酸铵混合液可以去除干扰。建立湿法消解电感耦合等离子体测定总铬方法,测定GSS-4均值为363.3 mg/kg,在标准值范围内。To determine 4 mg/L of chromium in different matrix by inductively coupled plasma opticalemission spectrometry （ICP-OES）, the negative interference was found from hydrochloric acid andperchloric acid. Along with the increase of hydrochloric acid or perchloric acid content from 1% to 5% inthe matrix, the negative interference of the former would accordingly increase whilst that of the latter wouldtend to be constant. Perchloric acid could cause about 0.5 mg/L negative interference in 4 mg/L chromiumsolution. An addition of ascorbic acid and ammonium acetate mixture could eliminate the interference.With a method for the determination of total chromium by wet digestion ICP-OES, the mean value ofGSS-4 was 363.3 mg/kg, within the standard range.

关 键 词：土壤污染 电感耦合等离子体发射光谱 铬 负干扰 

分 类 号：O657.3[理学—分析化学]