电感耦合等离子体发射光谱法直接测定铜矿石中银铜铅锌
Direct Determination of Silver, Copper, Lead and Zinc in Copper Ores by Inductively Coupled Plasma-Atomic Emission Spectrometry
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摘要: 采用硝酸-氢氟酸-高氯酸混合酸消化处理样品,电感耦合等离子体发射光谱法同时测定了铜矿石中的银、铜、铅和锌。较系统地研究了仪器的最佳化工作参数,采用基体匹配和校正因子相结合的办法校正样品的基体干扰和光谱干扰。方法检出限为:银3.15 μg/g,铜4.00 μg/g,铅12.0 μg/g,锌6.00 μg/g(稀释因子500),精密度(RSD,n=12)在0.38%~4.55%。方法经国家一级多金属矿石标准物质验证,测定值与标准值吻合,结果准确可靠。Abstract: Copper ore samples were digested with HNO3-HCl-HClO4 mixed acid and silver, copper, lead and zinc in sample solutions were then directly determined by inductively coupled plasma-atomic emission spectrometry (ICP-AES). The determination parameters were systematically studied and optimized. Matrix matching and correction factor methods were used for the correction of matrix effect and spectral interference. The detection limits of the method (dilution factor=500) were 3.15 μg/g for Ag, 4.00 μg/g for Cu, 12.0 μg/g for Pb and 6.00 μg/g for Zn. The reliability of the method has been tested by determination of these elements in polymetallic ore National Standard Reference samples and the results are in agreement with the certified values with precisions of 0.38%~4.55%RSD (n=12).
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