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方法描述了测定地质样品和水样中超痕量级的金.该法涉及到用碲共沉金,随后用中子活化沉淀.测量~(198)Au,探测和测定极限分别为0.7和2.3ng/g金.γ谱内的主要干扰是碘、溴.用挥发法可消除这些干扰元素.该方法还定量地收集了钯和铑.金的地壳丰度估计为2.5ng/g.因此在地质样品测金中,不考虑最后的分析技术,但在整个方法中,必须采取分离或预先富集的步骤.因为用r—谱仪的中子活化法比其它技术测金具有更高的灵敏度,所以它被人们应用到地质样品的常规分析上.和中子活化一起使用的两种最普通的分离步骤是火试金和照前或照后提取.
Methods describe the determination of ultra-trace levels of gold in geological samples and water samples, involving the co-precipitation of gold with tellurium, followed by precipitation with neutron Activation of ~ (198) Au with detection and detection limits of 0.7 and 2.3 ng / g gold.The main interference in the gamma spectrum is iodine and bromine.These interference elements are eliminated by the volatilization method.The method also quantitatively collects palladium and rhodium.The crustal abundance of gold is estimated to be 2.5 ng / In the sample gold-casting, the last analysis technique is not considered, but in the whole method, the steps of separation or pre-enrichment must be taken.Because neutron activation method using r-spectrometer has higher sensitivity than gold plating by other techniques, So it has been applied to the routine analysis of geological samples.The two most common separation steps used with neutron activation are fire assay and extraction before or after irradiation.