电感耦合等离子体原子发射光谱法测定地质样品中铂钯金

Determination of platinum,palladium and gold in geological samples by inductively coupled plasma atomic emission spectrometry

在HCl-H2O2湿法分解体系中,加入KClO3分解样品,不仅克服了NO3-对铂、钯吸附率的影响,而且极大提高了样品分解能力。样品经HCl-H2O2-KClO3高效湿法分解体系分解后,溶液在10%(V/V)HCl介质中,通过活性炭-717阴离子交换树脂混合吸附剂进行分离富集,有效消除了干扰元素的影响。以Pt 265.945{127}nm、Pd 340.458{99}nm、Au 242.795{139}nm作为分析谱线,建立了电感耦合等离子体原子发射光谱法(ICP-AES)测定地质样品中铂、钯、金的方法。方法中铂、钯、金的检出限分别为0.015、0.012、0.005 1μg/g,测定下限分别为0.050、0.040和0.017μg/g。按照实验方法测定地质标准样品中铂、钯、金,测定结果的相对标准偏差(RSD,n=10)均不大于6.7%,测定结果与认定值相符。

The sample was decomposed by KClO3 in HCl-H2O2 wet system.It not only overcame the influence of NO3-to platinum and palladium,but also greatly enhanced the decomposition capacity.After decomposition in HCl-H2O2-KClO3 high-efficiency wet system,the sample solution was separated and enriched by activated carbon-717 anion exchange resin mixed adsorbent in 10%(V/V)HCl medium.The influence of interference elements could be effectively eliminated.The Pt 265.945{127}nm,Pd 340.458{99}nm and Au 242.795{139}nm were used as analytical lines.The determination method of platinum,palladium and gold in geological samples by inductively coupled plasma atomic emission spectrometry(ICPAES)was established.The detection limit of platinum,palladium and gold was 0.015,0.012 and 0.005 1μg/g,respectively.The low limit of determination was 0.050,0.040 and 0.017μg/g,respectively.The platinum,palladium and gold in standard geological samples were determined according to the experimental method,and the relative standard deviations(RSD,n=10)were less than 6.7%.The found results were consistent with the certified values.