2-[2-(5-溴喹啉)-偶氮]-5-二乙氨基苯酚固相萃取光度法测定环境样品中镉的研究

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摘要：合成了新试剂2-[2-(5-溴喹啉)-偶氮]-5-二乙氨基苯酚(5-Br-QADEAP)，试剂结构通过元素分析，红外光谱和核磁共振氢谱鉴定。研究了5-Br-QADEAP与镉的显色反应，在pH 8.0的硼酸-氢氧化钠缓冲介质中，Triton X-100存在下，5-Br-QADEAP与镉反应生成2∶1稳定络合物，体系最大吸收波长λ_max=595 nm，摩尔吸光系数ε=1.60×10⁵ L·mol^-1·cm^-1，样品中的镉用强阴离子交换固相萃取柱固相萃取预分离和富集后用该方法测定，方法相对标准偏差在2.5%～3.2%之间，标准回收率在96%～105%，结果令人满意。

关键词：2-[2-(5-溴喹啉)-偶氮]-5-二乙氨基苯酚;镉;光度法;固相萃取

Abstract：A new chromogenic reagent 2-[2-(5-bromoquinolinylazo)]-5-diethylaminophenol (5-Br-QADEAP) was synthesized, and its structure was verified by elemental analysis, infrared spectrum, and ¹H nuclear magnetic resonance spectrum. The color reaction of 5-Br-QADEAP with cadmium was studied. In the presence of pH 8.0 buffer solution and Triton X-100 medium, 5-Br-QADEAP can react with cadmium(Ⅱ) to form a stable 2∶1 complex (5-Br-QADEAP: Cd(Ⅱ). The molar absorptivity is 1.60×10⁵ L·mol^-1·cm^-1 at 595 nm. Beer’s law is obeyed in the range of 0-1.0 μg·mL^-1. The cadmium ion in the samples can be enriched and separated by solid phase extraction with anion exchange resin cartridge. This method was applied to the determination of cadmium in water and food. The relative standard deviations are 2.5%-3.2%, and the recoveries are 96%-105%. The results are satisfactory.

Key words：2-[2-(5-bromoquinolinylazo)]-5-diethylaminophenol;Cadmium;Spectrophotometry;Solid phase extraction

收稿日期: 2004-11-10 修订日期: 2005-03-27

中图分类号:

O657.3

通讯作者: 吴献花

引用本文:

吴献花¹，胡秋芬^{1, 2}，杨光宇²，林洪¹，李海涛¹ . 2-[2-(5-溴喹啉)-偶氮]-5-二乙氨基苯酚固相萃取光度法测定环境样品中镉的研究[J]. 光谱学与光谱分析, 2006, 26(02): 327-330.
WU Xian-hua¹, HU Qiu-fen^{1, 2}, YANG Guang-yu², LIN Hong¹, LI Hai-tao¹ . Study on Solid Phase Extraction and Spectrophotometric Determination of Cadmium with 2-[2-(5-Bromoquinolinylazo)]-5-Diethylaminophenol . SPECTROSCOPY AND SPECTRAL ANALYSIS, 2006, 26(02): 327-330.

链接本文:

https://www.gpxygpfx.com/CN/Y2006/V26/I02/327

[1] CHEN Fei(陈飞). Chinese Journal of Hygiene Research(卫生研究), 1991，20(6)：31.
[2] CHEN Li-li, JIN Ji-Hong, QIN Sun-wei(陈莉莉，金继红，秦孙巍). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003, 23(3): 597.
[3] LIU Bin, SUN Jia-juan(刘彬，孙家娟). Chinese Journal of Metallurgical Analysis(冶金分析), 2001，21(5)：36.
[4] WU Fang-ying, HUANG Jian-feng(吴芳英，黄坚峰). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2001，21(1)：92.
[5] LIU Gen-qi, CHENG Yong-qing, ZHANG Guang(刘根起，程永清，张光). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2003，23(5)：1021.
[6] XIA Chang-bin, HE Xiang-zhu, HUANG Nian-dong, SHI Hong-wen(夏畅斌，何湘柱, 黄念东, 史红文). Spectroscopy and Spectral
Analysis(光谱学与光谱分析), 2003，23(1)：205.
[7] CAO Xiao-an, CHEN Yong-heng, LIN Hua-min(曹小安，陈永亨，林华敏). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004，24(4)：474.
[8] SHU Wen-bin, ZHU Ruo-hua, QIANG Hong, GU Xue-xin(苏文斌，朱若华，强红，谷学新). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004，24(3)：270.
[9] Hu Qiu-fen, Yang Guang-yu, Yin Jia-yuan, Yao Yun. Talanta. 2002, 57(4): 751.
[10] WANG Lin, HU Qiu-fen, YANG Guang-yu, YIN Jia-yuan(王琳，胡秋芬，杨光宇，尹家元). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004，24(2)：187.
[11] TAI Xi, HU Qiu-fen, YANG Guang-yu, YIN Jia-yuan(台希，胡秋芬，杨光宇，尹家元). Spectroscopy and Spectral Analysis(光谱学与光谱分析), 2004，24(1)：125.
[12] ZENG Yun-e, ZHANG Hua-shan，CHEN Zhen-hua(曾云鹗，张华山，陈震华). Handbook of Modern Chemical Reagents, the Forth Fascicule, Chromogenic Agent of Inoganic Ion(现代化学试剂手册·四分册·无机离子显色剂). Beijing: Chemical Industry Press(北京：化学工业出版社), 1989. 785.
[13] Translated and Edited by MAO Jia-jun, ZHU Da-chang(毛家俊，祝大昌编译). The Preconcentration and Separation Method for Trace Inorganic Analysis, 2nd ed(无机痕量分析中的分离和预浓集方法, 第2版). Shanghai: Fudan University Press(上海: 复旦大学出版社), 1995. 517.