矿石中金铂钯联测新方法研究

Study on New Method of Combined Measurement of Gold, Platinum and Palladium in Ore

金元素在自然界含量极低,地壳丰度为1ng/g,在自然界主要以自然金产出,部分与铂族元素形成合金存在于自然界中,铂钯为铂族元素,在地壳中含量极微,属于超痕量元素.目前铂族元素的分析,由于其含量极低,基体复杂,背景干扰严重,是当代岩石矿物分析公认的难题,目前国内尚且没有一个合适的方法可以同时测定出矿石中的金,铂,钯三种元素的含量.本方法采用金属锑富集矿石中的金,铂,钯三种元素,再利用浓王水解析,解析后的溶液定容至10毫升比色管中,用原子吸收分光光度计测定溶液中的金元素,用电感耦合等离子体质谱测定溶液中的铂钯元素,本方法分析结果准确,分析速度快,并且同时测定出矿石中的金,铂,钯三种元素,极大地提高了分析速度,便于大批次样品的普查和详查.

Gold has a very low content in the natural environment,and the abundance of the crust is 1 ng/g.It is mainly produced by natural gold in nature,and some alloys with platinum group elements exist in nature.Platinum and palladium are platinum group elements and are contained in the earth's crust.Very small,belonging to ultra-trace elements.At present,the analysis of platinum group elements,due to its extremely low content, complex matrix and serious background interference,is a recognized problem in contemporary rock mineral analysis.At present,there is no suitable method in China to simultaneously determine gold,platinum and palladium in ore.The content of the elements.The method adopts three elements of gold,platinum and palladium in the metal ore-enriched ore,and then analyzes the solution by using concentrated aqua regia,and the solution is made up to a 10 ml colorimetric tube,and the solution is determined by an atomic absorption spectrophotometer.The gold element was determined by inductively coupled plasma mass spectrometry to determine the platinum-palladium element in the solution.The analytical results of ihis method are accurate,the analysis speed is fast,and the three elements of gold,platinum and palladium in the ore are simultaneously determined,which greatly improves the analysis speed.It facilitates the census and detailed investigation of large batches of samples.