摘要
在OP乳化剂存在下，研究了Pb^2＋和双硫腙的配位显色反应。试验结果表明，在pH=5．0的HAc-NaAc缓冲溶液中，有色溶液的最大吸收波长为500nm，摩尔吸光系数为4．8×10^4L／（mol·cm），Pb^2＋浓度在0～1．2mg／L范围内符合比耳定律，加标回收率为98．5％～102．1％之间。本法用于测定处理电镀废水中的微量铅，方法简单易行，结果可靠。
The complexing chromogenic reaction of Pb2+ and dithizone in the presence of polyoxycthylene octylphenol ether (OP) emulsifier was studied, aiming at establishing the spectrophotometric method for the determination of trace lead in electroplating wastewater. The results showed that the maximum absorption of the color solution in the buffer system of HAc- NaAc with a pH value of 5.0 was located at 500 run, and the molar absorptivity was 4.8 × 104 L/(mol · cm). At the same time, Beer s law was obeyed as the concentration of Pb2+ was within 0-1.2 mg/L, and the standard recovery rate of Pb2+ amounted to 98.5% - 102. 1 %. Thus it was supposed that the complexing chromogenic reaction of Pb2+ and dithizone in the presence of the emulsifier could be well used for the spectrophotometric determination of trace Pb2+ in electroplating wastewater modified with meerschaum.
出处
《材料保护》
CAS
CSCD
北大核心
2007年第2期75-76,共2页
Materials Protection
关键词
铅
电镀废水
分光光度法
测定
双硫腙
OP乳化剂
lead
electroplating wastewatcr
spectrophotometry
determination
dithizone
OP emulsifier
