论文部分内容阅读
本法采用饱和氯酸钾-盐酸分解化探样,从而避免了用王水溶样后,残余的硝酸破坏还原剂硫脲(析出单体硫)对测定砷、锑的影响。砷、锑、铋为易挥发元素,在盐酸介质中加入氯酸钾可将砷、锑氧化成难挥发的五价态。砷、锑、铋在10～30%酸度下测定灵敏度变化不大,因此,溶样后试液酸度保持在20%左右为佳。测定体积控制在2～5毫升,体积太大,反应不完全,太小,重现性差。一仪器与试剂 WYD-2型双道氢化物无色散原子荧光分析仪,江
This method uses saturated potassium chlorate - hydrochloric acid decomposition of the sample, thus avoiding the dissolution of aqua regia, the residual nitric acid destruction of thiourea reductant (precipitation of monomer sulfur) on the determination of arsenic, antimony. Arsenic, antimony, bismuth is a volatile element, adding potassium chlorate in a hydrochloric acid medium can be arsenic, antimony oxidation into a volatile pentavalent state. Arsenic, antimony, bismuth in the 10 ~ 30% acidity determination of little change in sensitivity, therefore, the acidity of the test solution after the sample is maintained at about 20% better. Determination of the volume control in 2 to 5 ml, the volume is too large, the reaction is not complete, too small, poor reproducibility. An instrument and reagent WYD-2-type two-channel hydrideless atomic fluorescence spectrometer, Jiang