邻甲基苯基重氮氨基偶氮苯与铊(Ⅲ)显色反应的光度法
SPECTROPHOTOMETRIC STUDY OF THE COLOR REACTION BETWEEN NEW REAGENT o-METHYLBENZENEDIAZOAMINOAZOBENZENE AND THALLIUM(Ⅲ)
摘 要
在非离子表面活性剂Triton X-100存在下及pH为10.4的氨水-NH4Cl缓冲介质中,显色剂邻甲基苯基重氮氨基偶氮苯(o-MDAAB)与铊(Ⅲ)形成1∶2的红色络合物,最大吸收波长位于516 nm处,铊(Ⅲ)质量浓度在0~20 μg/25 mL范围内符合比耳定律,其表观摩尔吸光系数为1.69×105L·mol-1·cm-1.在体系中加入柠檬酸三钠,试剂的选择性较好.已用于自来水及合成水样中微量铊的测定,分析结果的相对标准偏差分别为1.05%及0.29%,回收率分别为97.5%和103.7%.
邻甲基苯基重氮氨基偶氮苯
铊
水
Spectrophotometry
o-Methylbenzenediazoaminoazobenzene
Thallium(Ⅲ)
Water sample
Abstract
It was found that in an ammoniacal buffer of pH 10.4 and in the presence of non-ionic surfactant Triton X-100,the new chromogenic reagent o-methylbenzenediazoaminoazobenzene (abbreviated as o-MDAAB) reacted with Tl(Ⅲ) to form a reddish colored complex,with its absorption maxima at the wavelength of 516 nm;and the mole ratio of Tl(Ⅲ) to o-MDAAB in the complex was found to be (Tl∶R) 1∶2.Beer′s law was obeyed in the concentration range of 0 to 20 μg of Tl(Ⅲ) per 25 mL of solution.The apparent molar absorptivity was found to be 1.69×105L·mol-1·cm-1.Selectivity of this method was improved by the addition of trisodium citrate.The proposed method has been applied to the determination of thallium in tap water and simulated water samples,giving RSD′s of 1.05% and 0.29%,and recoveries of 97.5% and 103.7% respectively.
中图分类号 O657.31
所属栏目 试验与研究
基金项目
收稿日期 2005/12/8
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备注李惠霞(1976-),女,山西人,硕士,从事金属铊的配位化学研究.
引用该论文: LI Hui-xia,YANG Xi,ZHANG Qi-ying,PAN Jiao-mai. SPECTROPHOTOMETRIC STUDY OF THE COLOR REACTION BETWEEN NEW REAGENT o-METHYLBENZENEDIAZOAMINOAZOBENZENE AND THALLIUM(Ⅲ)[J]. Physical Testing and Chemical Analysis part B:Chemical Analysis, 2006, 42(9): 702～704
李惠霞,杨茜,张其颖,潘教麦. 邻甲基苯基重氮氨基偶氮苯与铊(Ⅲ)显色反应的光度法[J]. 理化检验－化学分册, 2006, 42(9): 702～704
被引情况:
【1】俞善辉,许宝海,吴斌才, "4-硝基-4′-氟苯基重氮氨基偶氮苯为显色剂双波长分光光度法测定痕量三价铊",理化检验－化学分册 45, 1-3(2009)
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参考文献
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【3】肖唐付,陈敬安,杨秀群.铊的水地球化学及环境影响[J].地球与环境,2004,32(1):28-33．
【4】United states environmental protection agency (USEPA).National primary drinking water regulations[EB/OL]．
【5】ZHANG Zhong,ZHANG Bao-gui,LONG Jiang-ping,et al.Thallium pollution associated with mining of thallium deposits[J].Science in China (Series D),1998,41(1):75-81．
【6】曹小安,陈永亨,周怀伟,等.邻羟基苯基重氮氨基偶氮苯与铊(Ⅲ)显色反应及其应用[J].光谱学与光谱分析,2001,21(3):350-352．
【7】郑国祥,郭忠先,邵勇,等.2-羟基-3-羧基-5-磺酸基苯基重氮氨基偶氮苯与铊反应的分光光度法研究[J].分析试验室,1997,16(2):21-24．
【8】曹小安,陈永亨,廖带娣.2-羟基-5-磺酸基苯基重氮氨基偶氮苯与铊(Ⅲ)显色反应得分光光度法研究[J].光谱学与光谱分析,2002,22(4):662-664．
【9】洪水皆,李庆喜.分光光度法测定铊的进展[J].化学试剂,1989,11(4):212-219．
【10】郭忠先,蔡蜀穗,郑国祥,等.邻羧基苯基重氮氨基偶氮苯胶束水相分光光度法测定痕量铊[J].化学试剂,1997,19(6):356-358．
【11】朱玉瑞,单晓斌,江万权,等.对偶氮苯重氮氨基偶氮苯磺酸与铊显色反应的研究[J].分析试验室,1994,13(6):34-35．
【12】洪水皆,李庆喜,杨明东.Triton X-100存在下镉试剂分光光度法测定痕量铊(Ⅲ)[J].化学学报,1988,46(5):500-502．
【13】潘教麦,陈亚森,严恒太.显色剂及其在冶金分析中的应用[M].上海:上海科技出版社,1981．
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