摘要
采用氢氟酸、硝酸、硫酸、高氯酸分解溶矿,用王水复溶后,移至聚乙烯试管中定容;提取1 m L澄清溶液,用(3+97)HNO3稀释至总稀释系数1 000倍后,在电感耦合等离子体质谱仪(ICP-MS)上测定Li、Be、Ga、Rb、Nb、Mo、Cd、Cs、Ta、W、Tl、Bi、Th、U元素,母液直接用电感耦合等离子体光谱仪(ICP-OES)测定Mg、Ca、Na、Co、Cu、Fe、La、Mn、Ni、Pb、Sr、Ti、Zn、V元素,此方法能充分溶解地质样品中的难溶元素和控制易挥发元素的损失,实验看出,岩石标准物质(GBW07106)、水系沉积物标准物质(GBW07309)和土壤标准物质(GBW07430)的测定值与标准值相吻合,检出限均符合规范要求。此方法准确度高,简单、快捷、实用能充分发挥大型仪器具有灵敏度高、检测限低、精密度好、线性范围宽及多元素同时测定等功能,具有样品前处理时间短、容易操作、成本低、准确度高、精密度好等优点,适合大批量地质样品多元素同时分析。
HNO3-HF- HCl O4–H2SO4 was used to dissolve the geological sample, and aqua regia was used to redissolve the sample, then they were moved into a polyethylene test tube for a constant volume, and 1 m L upper clear solution was diluted to 1 000 folds of the total dilution coefficient with（3＋97）HNO3,then Li,Be,Ga,Rb,Nb,Mo, Cd,Cs,Ta,W,Tl,Bi,Th and U elements in the sample were simultaneously determined by ICP-MS, and Mg,Ca,Na, Co,Cu,Fe,La,Mn,Ni,Pb,Sr,Ti,Zn and V elements in the mother solution were determined by ICP-OES. The method can fully dissolve refractory elements in the geological sample and control the loss of volatile elements. The certified reference material of rock（GBW07106）,stream sediment（GBW07309） and soil（GBW07430） were analyzed to test the method.The results are in good agreement with certified values.The method has many advantages such as short analysis time, low labor intensity and easy operation. This method is rapid, simple and practical with high precision; it can be used in simultaneous determination of multi-elements in geological samples.
出处
《当代化工》
CAS
2016年第5期1052-1054,1057,共4页
Contemporary Chemical Industry
