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一、前言 磷和铋在钼精矿中常常与主量元素钼、硅等伴生,为确保钼精矿质量,它们已被列为必测元素之一(尽管其含量在0.0x％～0.00x％范围内)。由于其含量甚微且又与大量钼等伴生,这就给测量它们的含量带来了一定的困难。一般情况下,若测定二元素的含量均采用有机溶剂萃取分离再进行测定的方法。例如,磷采用正丁醇或乙醚萃取进行光度测定(此方法砷有干扰);铋采用马钱子碱-苯萃取进行光度法测定(马钱子碱有毒)。以上两种方法需要大量的有机溶剂,这对保护环境和分析人员的身体都是有害的。若利用仪器进行分析,例如,磷铋二元素在原子吸收光谱仪上测定,无疑将受到火焰和仪器的限制。
I. Introduction Phosphorus and bismuth are often associated with molybdenum and silicon in molybdenum concentrates. They have been listed as one of the necessary elements to ensure the quality of molybdenum concentrates (although their contents are between 0.0x% and 0.00x % Range). Due to its small content and with a large number of molybdenum and other associated, which gives the measurement of their content has brought some difficulties. In general, if the determination of two elements are separated by organic solvent extraction and then measured. For example, phosphorus is extracted by n-butanol or ether for photometry (this method has arsenic interference); bismuth spectrophotometric determination (strychnine toxic) using strychnine-benzene extraction. Both of these methods require large amounts of organic solvents, which are detrimental to the environment and to the analyst’s body. Analysis using instrumentation, for example, phosphorus bismuth two elements in the atomic absorption spectrometry determination, will undoubtedly be flame and instrumentation.