电感耦合等离子体原子发射光谱法测定多金属矿石中砷镉铟硫锑

Determination of arsenic,cadmium,indium,sulfur and antimony in polymetallic ore by inductively coupled plasma atomic emission spectrometry

以高氯酸、硝酸和氢氟酸溶解试样，柠檬酸和硝酸浸取盐类，选择189．042、214．438、230．608、182．034、217．581 nm波长的光谱线分别作为砷、镉、铟、硫、锑的分析线，在设定的仪器参数下用电感耦合等离子体原子发射光谱法（ICP—AES）测定多金属矿石中砷、镉、铟、硫和锑含量。谱线的重叠和背景干扰通过选择无干扰或干扰小的谱线作为分析线和采用干扰系数法校正进行消除。方法的线性范围：对于砷为0～30／μg／mL，对于镉为0～10μg／mL，对于铟为0～lμg／mL，对于硫为0～l500μg／mL，对于锑为0～5μg／mL。砷、镉、铟、硫和锑的检出限分别为0．87，0．04，1．0，3．5和0．81μg／mL。方法用于多金属矿石标准物质的测定，测定值与认定值吻合，相对标准偏差（RSD，n=11）小于4．0％。

As,Cd,In,S and Sb in polymetallic ore were determined by inductively coupled plasma atomic emission spectrometry with spectral lines of 189.042,214.438,230.608,182.034 and 217.581 nm as analytical line respectively,under preset instrumental parameters.Before determination,the sample was dissolved in the mixture of perchloric acid,nitric acid and hydrofluoric acid,and the salts were extracted by citric acid and nitric acid.Spectral overlapping and background interference were eliminated by means of selecting noninterferential or less interferential spectral line as analysis line and adopting interference coefficient correction method.The linear range of the method was 0-30μg/mL for As,0-10μg/mL for Cd,0-1μg/mL for In,0-1 500μg/mL for S and 0-5μg/mL for Sb.The detection limit for As,Cd,In,S and Sb was 0.87,0.04,1.0,3.5and 0.81μg/mL respectively.The proposed method has been used for the determination of CRMs of polymetallic ores,whose results was consistent with the certified values,with relative standard deviation(RSD,n=11)less than 4.0%.