| 纳米二氧化钛富集-分光光度法测定水体中痕量5-磺基水杨酸 |
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| 引用本文： | 陈乙平,李顺兴.纳米二氧化钛富集-分光光度法测定水体中痕量5-磺基水杨酸[J].分析化学,2010,38(11). |
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| 作者姓名： | 陈乙平 李顺兴 |
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| 作者单位： | 1. 漳州师范学院化学与环境科学系,漳州,363000
2. 漳州师范学院化学与环境科学系,漳州,363000;分析科学福建省高校重点实验室,漳州,363000 |
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| 基金项目： | 国家自然科学基金(Nos.20977074,20775067); 福建省杰出青年科学基金(No.2010J06005); 福建省科技厅项目(No.2008F5063); 福建省高等学校新世纪优秀人才支持计划(闽科教200720)资助项目 |
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| 摘 要： | 采用纳米TiO2化学吸附法富集水样中痕量5-磺基水杨酸。5-磺基水杨酸含有酚羟基(OH)和羧基(COOH)可与TiO2表面上的羟基(OH)发生酯化反应,形成稳定的六元环结构。纳米TiO2对5-磺基水杨酸的吸附量≤18.47mg/g,在pH2.5、吸附时间20min、吸附剂用量1.80g/L的条件下,纳米TiO2对试样中5-磺基水杨酸的吸附率达到99.0%,以5mL2mol/L NaOH为洗脱液,洗脱率达99.8%,对试样中5-磺基水杨酸的富集倍数达50倍,检出限(3σ,n=11)为26.7μg/L。本法操作简便,直接用于九龙江和海水中痕量5-磺基水杨酸的测定,结果准确,回收率达到95.5%～98.5%。
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| 关 键 词： | 纳米TiO2 5-磺基水杨酸 吸附 分光光度法 |
Solid Phase Adsorption-Spectrophotometric Determination of Trace 5-Sulfosalicylic Acid Using Titanium Dioxide Nanoparticles as Adsorbent |
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| CHEN Yi-Ping,LI Shun-Xing.Solid Phase Adsorption-Spectrophotometric Determination of Trace 5-Sulfosalicylic Acid Using Titanium Dioxide Nanoparticles as Adsorbent[J].Chinese Journal of Analytical Chemistry,2010,38(11). |
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| Authors: | CHEN Yi-Ping LI Shun-Xing |
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| Institution: | CHEN Yi-Ping1,LI Shun-Xing* 1,2 1 ( Department of Chemistry & Environmental Science,Zhangzhou Normal University,Zhangzhou 363000) 2 ( Fujian Province University Key Laboratory of Analytical Science,Zhangzhou 363000) |
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| Abstract: | A method for preconcentration of 5-sulfosalicylic acid ( SSA) with nanometer size TiO2 and determination by spectrophotometry has been developed. Under the adsorption conditions of pH 2. 5,adsorption time of 15 min,adsorbent dosage of TiO2 1. 80 g/L,and the adsorptive capacity of TiO2 less than 18. 47 mg/g,the adsorption rate of SSA was more than 99. 0% . The adsorbed SSA could be eluted by 5 mL NaOH of 2 mol/L and the elution percentage was more than 99. 8% . This method gave an enrichment fold of 50 for 2... |
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| Keywords: | Nanometer-size titanium dioxide 5-Sulfosalicylic acid Solid phase adsorption Spectrophotometric determination |
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