| 琉基葡聚糖凝胶分离富集-二溴对甲偶氮羧微乳液分光光度法测定微量镍 |
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| 引用本文： | 陈文宾,王丽萍,马卫兴,许兴友,徐国想.琉基葡聚糖凝胶分离富集-二溴对甲偶氮羧微乳液分光光度法测定微量镍[J].环境监测管理与技术,2008,20(3):31-34. |
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| 作者姓名： | 陈文宾 王丽萍 马卫兴 许兴友 徐国想 |
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| 作者单位： | 中国矿业大学环境与测绘学院,淮海工学院化学工程系;中国矿业大学环境与测绘学院,淮海工学院化学工程系;淮海工学院化学工程系;淮海工学院化学工程系;淮海工学院化学工程系 |
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| 基金项目： | 教育部重点实验室基金
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淮海工学院海洋生物技术重点建设实验室基金
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淮海工学院校科研和教改项目 |
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| 摘 要： | 研究了在溴代十六烷基吡啶（CPB）、正丁醇、正庚烷、水自制微乳溶液存在下，镍与二溴对甲偶氮羧（DBpMCA）的显色反应，在pH值为9．07的Na2B4O7-HCl缓冲溶液中，镍与试剂形成淡红色配合物，最大吸收峰位于560nm波长处，表观摩尔吸光系数ε为2．8×10^5L／（mol·cm）。优化了试验条件，考察了共存离子的影响，方法在0．002mg／L～0．320mg／L范围内符合比尔定律，检出限为0．0006mg／L，生活垃圾、水、土壤样品测定的RSD为2．1％～5．2％，加标回收率为96．6％～104％。
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| 关 键 词： | 镍 琉基葡聚糖凝胶 二溴对甲偶氮羧 分光光度法 |
M icroemulsion spectrophotometric Determ ination ofM icro Nickelwith Dibromo p methylCarboxyazo after Separation and EnrichmentbyM ercapto dextrangel |
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| CHEN Wen-bin,WANG Li-ping,MA Wei-xing,XU Xing-you,XU Guo-xiang.M icroemulsion spectrophotometric Determ ination ofM icro Nickelwith Dibromo p methylCarboxyazo after Separation and EnrichmentbyM ercapto dextrangel[J].The Administration and Technique of Environmental Monitoring,2008,20(3):31-34. |
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| Authors: | CHEN Wen-bin WANG Li-ping MA Wei-xing XU Xing-you XU Guo-xiang |
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| Institution: | CHEN Wen-bin, WANG Li-ping, MA Wei-xing, XU Xing-you, XU Guo-xiang ( 1. School of Environment Science and Spatial Inforrnatics, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China; 2. Department of Chemical Engineering, Huaihai Institute of Technology, Lianyungang , Jiangsu 222005, China) |
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| Abstract: | The color reaction of the reagent Dibromo-p-methyl carboxyazo （DBpMCA） with nickel in the presence of micromulsion Cetyl Pyridine Bromide（CPB） ,n-C4H9OH,CTH14 ,H2O were studied. Results showed that the color reagent with nickel and DBpMCA microemulsiom formed a stable light red complex in the medium of Na2B4O7-HCl buffer at pH 9.07. The maximum absorption wavelength and apparent molar absorptivity were 560 nm and 2.8 × 10^5 L/（ mol · cm） respectively. The test parameters were optimized and influence of coexist ions was observed. Beer＇s Law was obeyed in the range of 0. 002 mg/L - 0. 320 mg/L for nickel. The detection limit was 0. 000 6 mg/L. The RSD and recovery were 2. 1% - 5.2% and 96.6% - 104% in water ,domestic waste and soil samples. |
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| Keywords: | Nicke l M ercapto dextrange l Dibromo p methylcarboxyazo(DBpMCA) Spectrophometry |
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