摘要
采用高效液相色谱分离Cr(Ⅲ)和Cr(Ⅵ),以乙二胺四乙酸二钠(EDTA-Na2)为流动相,加入O2减少40Ar^(12)C对+52Cr的质谱干扰。结果表明,Cr(Ⅲ)和Cr(Ⅵ)在0.5~100μg/L范围内线性关系良好,线性相关系数R2分别为0.9997和0.9998。Cr(Ⅲ)与Cr(Ⅵ)的方法检出限均为0.1μg/L。采用本方法对美国NSI Lab Solutions公司的3种铬形态标准物质进行了测定,测定结果均在标准值的允许误差范围内,加标回收率为91.9%~116.7%。该方法可用于土壤及沉积物中水溶态铬形态的分析测定。
Cr(Ⅲ)and Cr(Ⅵ)were separated by high performance liquid chromatography by using EDTA-Na_(2) as mobile phase.Oxygen was added to reduce the interference of 40Ar^(12)C on+52Cr in mass spectrometry.The results showed that the linear relationships of Cr(Ⅲ)and Cr(Ⅵ)were good in the concentration range of 0.5-100μg/L,and the correlation coefficients were 0.9997 and 0.9998,respectively.The method detection limits of Cr(Ⅲ)and Cr(Ⅵ)both were 0.1μg/L.The method was applied to determine standard substances of NSI Lab Solutions with three kinds of chromium speciation,and the results were agreement with the certified values.The recoveries were 91.9%-116.7%at three spiked concentrations.The method is suitable for the determination of water-soluble chromium in soil and sediment samples.
作者
张晨
李冰
刘崴
胡俊栋
ZHANG Chen;LI Bing;LIU Wei;HU Jundong(National Research Center for Geoanalysis,Beijing 100037,China;BGRIMM MTC Technology Co.,Ltd,Beijing 102628,China)
出处
《分析试验室》
EI
CAS
CSCD
北大核心
2023年第5期671-676,共6页
Chinese Journal of Analysis Laboratory
基金
中国地质调查局地质调查项目(DD20221838)
国家地质实验测试中心大型科研仪器开放共享后补助资金(GXBZ-2021-01)项目资助。
