PAN－S光度法测定水和矿石中铋

SPECTROPHOTOMERIC DETERMINATION OF BISMUTH IN WATER AND ORE WITH PAN-S

本文研究了ＰＡＮ－Ｓ铋的显色反应。配合物的最大吸收峰位于５４６ｎｍ处，表现摩尔吸光系数为１．２０×１４￣４Ｌ·ｍｏｌ￣（－１）·ｃｍ￣（－１），铋量ρ（Ｂｉ）／（μｇ·ｍｌ￣（－１））在０－２．４范围内符合比尔定律，采用疏基棉分离常见干扰离子富集铋，使选择性和灵敏度显著提高，方法用于水及矿石中铋的测定，结果满意。

In this paper,the condition of colour reaction of bismuth with PAN-S is studied.Themaximum absorbance of the complex is at 546 nm and its apparent molar absorptivity is 1.20×10￣4L· mol￣(-1)· cm￣(-1). Beer's law is obeyed in the range of 0--2.4μg/ml for bismuth. Thecommon netal ions can be separated,and to enrich bismuth by sulfhydryl cotton fiber,thus,great-ly improving the selectivity and sensitivity of the system. The method is used to determin the bis-muth in water and ore and the results are satisfactory.