浊点萃取-激光热透镜光谱法测定痕量钯

发布时间：2018-04-24 23:18

本文选题：激光热透镜光谱法 + 浊点萃取　；参考：《化学研究与应用》2015年01期

【摘要】：以2-(5-溴-2-吡啶偶氮)-5-二甲氨基苯胺(5-Br-PADMA)为络合剂,用非离子型表面活性剂Triton X-114浊点萃取样品溶液中的痕量钯。探讨了溶液p H、络合剂用量、平衡温度及时间、表面活性剂用量等实验条件对体系浊点萃取效率及测定灵敏度的影响,并详细研究了多种阴、阳离子对测定的干扰情况。在最佳条件下,钯浓度在4~80 ng·m L-1范围内与热透镜信号强度呈线性关系,方法的检出限为1.2 ng·m L-1,该法用于自来水中痕量钯的测定,加标回收率为95.5~96.7%,相对标准偏差为0.87%~2.49%。
[Abstract]:The trace palladium in the sample solution was extracted by using the Nonionic surfactant Triton X-114 as the complexing agent with 2-O5-bromo-2-pyridylazo azo-5-dimethylaminoaniline (5-Br-PADMA) as the complexing agent. The effects of solution pH, amount of complexing agent, equilibrium temperature and time, amount of surfactant on the extraction efficiency and determination sensitivity of the system were discussed. The interference of various anions and cations on the determination was studied in detail. Under the optimum conditions, the concentration of palladium in the range of 480 ng mL ~ (-1) was linear to the intensity of the thermal lens signal. The detection limit of the method was 1.2 ng mL ~ (-1). The method was applied to the determination of trace palladium in tap water. The recovery of the method was 95.5 渭 m ~ (-6) and the relative standard deviation was 0.87 ~ (2.49).
【作者单位】：西安文理学院化学与化学工程学院;
【基金】：2012年西安市科技计划创新基金项目(CX12189WL20)资助西安市科技计划项目(CXY1352WL04)资助
【分类号】：O657.3;R123.1

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