摘要
本方法建立了以多硫化合物、多碘化合物为缓冲剂(液体缓冲剂),上电极为光谱纯石墨电极、下电极为光谱纯石墨加罩电极的方式,采用控制试样法绘制工作曲线,电弧发射光谱法同时测定区域地球化学样品中As、Sb、Bi、Cd、Tl、In等6元素的测定方法。方法检出限为As1.0μg/g,Sb0.2μg/g,Bi0.1μg/g,Cd0.05μg/g,Tl0.1μg/g,In0.01μg/g;精密度(RSD,n=12)为As8.36%,Sb7.17%,Bi7.60%,Cd7.39%,Tl7.13%,In6.76%。方法用于测定国家一级标准物质GSD-1～GSD-12中As、Sb、Bi、Cd、Tl、In,测定值与标准值或参考值吻合。通过对1:50000区域地球化学调查样品中As、Sb、Bi、Cd、Tl、In实际分析,结果成图效果良好,具有简便快捷、成本低、检出限低、精度高等特点。
Approach taken by multi-sulphur, multi-iodine compounds as a buffer, electrode on the hood for the spectra of pure graphite electrode and under the hood for the spectra of pure graphite electrodes increases, control the sample to drawn curve, and arc emission spectrometry for the determination of six elements of As、Sb、 Bi、Cd、Tl、In. The detection limit of the method are As1.0ug / g, Sb0.2ug / g, Bi0.1ug / g, Cd0.05ug / g, Tl0.1ug / g, In0.01ug / g; The precision are As8.36%, Sb7.17%, Bi7.60%, Cd7.39%, Tl7.13%, In6.76%; determined the six elements of As、Sb、Bi、Cd、Tl、In which in national standard matter GSD-1～GSD12 by this way, the result are in line with the standard value or reference.
出处
《甘肃地质》
2010年第1期79-82,共4页
Gansu Geology
关键词
发射光谱
缓冲剂
加罩电极
多硫化合物
多碘化合物
化探样品
emission spectrometry
buffer
electrode with cover
multi-sulphur compounds
multi-iodine compounds
samples for geochemical prospecting
