摘要
研究了在非离子表面活性剂TritonX-100存在下,双硫腙分光光度法测定水中微量铅的方法.检测溶液在波长503nm处有最大吸收峰,铅离子浓度在0—6μg/mL范围内符合比尔定律,铅离子的测定范围已由过去的0—3μg/mL提高到0~6μg/mL.用此方法与原子吸收法作对比,分别测铅合成水样的浓度,偏差为1.3%,可在水相中直接用光度法测定微量铅,是一种简单、快速、准确的方法.
This paper studies the determination of micro lead( Ⅱ ) in aqueous solution by the dithizone spectrophotometry in the presence of Triton X - 100. The maximum absorbance peak value of test solution is at 503 nm. Lambert - Beer's law is obeyed in the range of Pb( Ⅱ )0 -6 μg/mL. The determination range of the lead concentration can be extended from 0 - 3 μg/mL to 0 - 6 μg/mL. Compared with atomic absorption method, the difference of the result is only 1.3% , and the content of micro Pb ( Ⅰ) can be directly determined in aqueous medium by spectrophotometry. This method is proved to be simple, rapid and exact.
出处
《昆明理工大学学报(理工版)》
2007年第6期81-83,共3页
Journal of Kunming University of Science and Technology(Natural Science Edition)
基金
国家发展和改革委员会高技术产业化西部专项(项目编号:发改高技[2004]2060号)