摘要
利用二甲酚橙为显色剂,在CTMAB作用下与铅发生显色反应能形成三元络合物,建立了一种高灵敏度、高效的流动注射分光光度法检测水质铅的含量新方法。实验中详细地探讨和优化了显色体系及各个仪器参数,对仪器的稳定性、精密度及线性范围进行了测试,探讨了各干扰离子对灵敏度的影响。本方法在铅浓度为8-2000μg·L-1范围内,线性方程为ΔA=0.1526C+4.1519(μg/mL),相关系数r=0.9991,线性关系良好;方法的检出限(3σ)为2.96μg·L-1;以10次连续进样,测定400μg·L-1铅的加标样品,其相对标准偏差(RSD)为1.53%,仪器稳定性良好。测试实际水样并与国标测试结果一致,加标回收率在98.3%和102.5%之间,方法实用性强。
Make xylenol orange as chromogenic reagent, and which react with lead to a ternary complex in CTMAB, building a new flow injection spectrophotometry method which is high sensitivity, high efficiency to tested lead content in water. Chemicals and physicals had been optimized in detail, the stability, precision and linear range of the instrument had been studied, and effects of various interfere ions on sensitivity had been investigated. The method provides a lineari- ty range over 8 to 2000 μg·L^-1, and the linearity equation was： Ae/ = 0.1526 （Pb2＋/μg·L^-1） ＋4.1519,r2 = 0.9991, linear relationship is good. The detection limit estimated （3α） was 2.96 μg·L^-1. The relative standard deviation （RSD） calculated from 10 times at 400 μg·L^-1 repeated injection was 1.53% and instrument have a good stability. The determination results of water samples were consistent with that of GB, and the recoveries were between 98.6% and 102.5%, the proposed method is pratical.
出处
《皮革科学与工程》
CAS
北大核心
2013年第4期66-70,共5页
Leather Science and Engineering
基金
国家863研究课题计划支助
项目编号2007AA092001-5
