论文部分内容阅读
本文研究了铂(Ⅱ)-4,5-二溴苯基萤光酮(Br-PF)-溴化十六烷基三甲胺(CTMAB)-OP多元配合物的显色条件及其应用。结果表明,只要将Pt(Ⅳ)预先用K_2C_2O_4还原成Pt(Ⅱ),则在pH3.8～4.5及室温下,Pt(Ⅱ)就可以和Br-PF迅速地形成稳定的极灵敏的配合物,其ε_(540nm)=8.32×10~5L·mol~(-1)·cm~(-1),为铂的增溶光度法中最为灵敏的方法。Pt(Ⅱ)与Br-PF的摩尔比为1:4。铂浓度在0～0.35ppm服从比耳定律。在掩蔽剂存在下可简便地测定催化剂中的微量铂,结果令人满意。
In this paper, the color conditions of platinum (Ⅱ) -4,5-dibromophenylfluorone (Br-PF) -hexadecyltrimethylammonium bromide (CTMAB) -OP complex and their applications were studied. The results showed that Pt (Ⅱ) could rapidly form stable polar sensitive complex with Br-PF at pH 3.8 ~ 4.5 and room temperature as long as Pt (Ⅳ) was reduced to Pt (Ⅱ) by K_2C_2O_4 in advance. (540nm) = 8.32 × 10 ~ 5L · mol -1 (-1) cm -1, which is the most sensitive method for solubilizing platinum. The molar ratio of Pt (Ⅱ) to Br-PF is 1: 4. Platinum concentration at 0 ~ 0.35ppm obey Beer’s law. The trace platinum in the catalyst can be easily measured in the presence of a masking agent, with satisfactory results.