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| 2-(2-喹啉偶氮)-5-二甲氨基酚固相萃取光度法测定锌的研究 | |
| 引用本文： | 周世萍,段昌群,刘宏程,胡秋芬. 2-(2-喹啉偶氮)-5-二甲氨基酚固相萃取光度法测定锌的研究[J]. 光谱学与光谱分析, 2005, 25(10): 1667-1670 |
| 作者姓名： | 周世萍 段昌群 刘宏程 胡秋芬 |
| 作者单位： | 1. 云南大学生命科学学院暨云南生物资源保护与利用国家重点实验室培育基地, 云南 昆明 650091 2. 西南林学院基础部, 云南 昆明 650224 3. 农业部农产品质量监督检验测试中心，云南 昆明 650000 |
| 基金项目： | 国家自然科学基金（30270284）,云南省自然科学基金重点项目（2002C0001Z）和云南大学基金重点项目（2002SM010Z）资助 |
| 摘 要： | 研究了新试剂2-(2-喹啉偶氮)-5-二甲氨基酚(QADMAP)与锌的显色反应，在pH 8.5的硼酸-氢氧化钠缓冲介质中，Triton X-100存在下，QADMAP与锌反应生成2∶1稳定络合物，体系最大吸收波长λmax=590 nm，摩尔吸光系数ε=1.22×105 L·moL-1·cm-1，样品中的锌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，结果令人满意。 |
| 关 键 词： | 2-(2-喹啉偶氮)-5-二甲氨基酚 锌 光度法 固相萃取 |
| 文章编号： | 1000-0593（2005）10-1667-04 |
| 收稿时间： | 2004-07-21 |
| 修稿时间： | 2005-04-25 |
Study on Solid Phase Extraction Spectrophotometric Determination of Zinc with 2- (2-Quinolylazo)-5-Dimthylaminophenol |
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| ZHOU Shi-ping,DUAN Chang-qun,LIU Hong-cheng,HU Qiu-fen. Study on Solid Phase Extraction Spectrophotometric Determination of Zinc with 2- (2-Quinolylazo)-5-Dimthylaminophenol[J]. Spectroscopy and Spectral Analysis, 2005, 25(10): 1667-1670 | |
| Authors: | ZHOU Shi-ping DUAN Chang-qun LIU Hong-cheng HU Qiu-fen |
| Affiliation: | 1. Laboratory for Conservation and Utilization of Bio-Resource & School of Life Science, Yunnan University, Kunming 650091, China2. Department of Basic Courses, Southwestern Forestry College, Kunming 650224, China3. Supervision and Testing Center for Farm Products Quality，Ministry of Agriculture，Kunming 650000, China |
| Abstract: | A highly sensitive, selective and rapid method for the determination of zinc based on the rapid reaction of zinc(II) with 2-(2-quinolylazo)-5-dimthylaminophenol (QADMAP) and the solid phase extraction of zinc ion with anion exchange resin cartridge was developed. In the presence of pH 8.5 buffer solution and Triton X-100 medium, QADMAP can react with zinc(II) to form a stable 2 :1 complex (QADMAP:Zn(II)). The molar absorptivity is 1.22 x 10(5)L x moL(-1) x cm(-1) at 590 nm. Beer's law is obeyed in the range of 0-1.0 microg x mL(-1). The zinc ions in the samples can be enriched and separated by solid phase extraction with anion exchange resincartridge. Testing results show that recovery for zinc(II) was from 95% to 104%, and RSD was below 3%. This method was applied to the determination of zinc in water and food with good results. |
| Keywords: | 2-(2-quinolylazo)-5-dimthylaminophenol Zinc(Ⅱ) Spectrophotometry Solid phase extraction |
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