论文部分内容阅读
微量锑的测定多数采用萃取比色法,氧化锌中微量锑的测定,以往也是采用萃取比色法。这些方法灵敏度较高,有一定的选择性,但是要用有机溶剂,有刺激性气味,操作也繁琐。最近也有在水相中直接测定的报导。本文试验了锑-水扬基萤光酮(SAF)-溴化十六烷基吡啶(CPB)三元体系的胶束增溶法测定锑。结果表明,当溶液pH为1.2—2.2时,络合物最大吸收波长为520nm,其组成比Sb:SAF:CPB为1:3:3,表观摩尔吸光系数为5.8×10~4,络合物至少稳定20小
Determination of trace amounts of antimony most of the colorimetric extraction method, the determination of trace amounts of antimony in zinc oxide, the past is the use of extraction colorimetry. These methods are highly sensitive and have some selectivity, but using organic solvents and irritating odors make the operation cumbersome. There have been recent reports of direct determination in the water phase. In this paper, antimony was measured by micellar solubilization of antimony - water - based fluorophenyl ketone (SAF) - cetyl pyridinium bromide (CPB) ternary system. The results showed that when the solution pH was 1.2-2.2, the maximum absorption wavelength of the complex was 520 nm. The composition ratio of Sb: SAF: CPB was 1: 3: 3 and the apparent molar absorptivity was 5.8 × 10 ~ 4. Stable at least 20 hours