电感耦合等离子体质谱法(ICP-MS)测定金矿石中的金作者：宋建华来源：《科技创新导报》2020年第25期 摘 要：金礦石基体成分复杂，金的含量较低，分析时需要大称样量（≧20g），分析周 期长，干扰因素多，本文采用逆王水硝化或焙烧、50%王水溶解、2%HNO3为介质、Rh作内标，基体浓度小于1mg/mL，建立了电感耦合等离子体质谱法（ICP-MS）测定金矿石中的金的方法。试验了稀释因子100～2000时的强度干扰情况，验证了内标加入方式（离线加入法和在线加入法）对分析误差的影响，最终确定稀释因子1000、离线内标加入法可取得较好结果，方法检出限为0.04µg/g，回收率为98%～103%，测的结果与原子吸收分光光度法和传统容量法一致，能够满足地质矿的要求。 关键词：质谱法 金矿石 测金 Rh在线内标法科技创新导报
四氯化硅
蛋氨酸铬小说吕乐 中图分类号：P575 文献标识码：A 文章编号：1674-098 X （2020）09（a）-0081-03
教育督导论文 Abtract： The matrix composition of gold ore is complex， the content of gold is low， the analysis needs large sample quantity （≧20 g）， the analysis period is long， and there are many interfering factors. In this paper， the method of inductively coupled plasma mass spectrometry （ICP-MS） for the determination of gold in gold ore is established by inverse nitration against aqua regia or roasting，50% aqua regia dissolved，
巴特沃斯滤波器
2% HNO3 as medium and Rh as internal standard， and the matrix concentration is less than 1 mg/mL. The intensity interference of dilution factor 100～2000 was tested， and the influence of internal standard addition （off-line addition method and on-line addition method） on the analysis error was verified. A good result can be obtained by adding sub1000 and off-line internal standard. The detection limit the method is 0.04µg/g， the recovery rate is 98～103%. The results are consistent with atomic absorption spectrophotometry and traditional capacity method， and can meet the requirements of geological prospecting.
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