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| 两步洗脱法FIA-FAAS测定水样中的锌 | |
| 作者姓名： | Wang ZY Zhang HK Fang HD Su YD Mittal GS |
| 作者单位： | 1. 国家海洋局南海环境监测中心,广东广州,510300 2. 仲恺农业工程学院轻工食品学院,广东广州,510225 3. 同济大学化学系,上海,200092 4. University of Guelph, Guelph, Canada |
| 基金项目： | 国家自然科学基金项目(29973029)资助 |
| 摘 要： | 建立了流动注射(FI)在线预富集与火焰原子吸收光谱(FAAS)联用测定水样中痕量锌的两步洗脱新方法。将洗脱和检测分成2个步骤进行。洗脱过程中,洗脱剂不经过蠕动泵管而是依靠蠕动泵的吸力通过聚四氟乙烯管(PTFE tube)进入编结反应器(KR),然后送入FAAS进行检测,大大延长了蠕动泵管的使用寿命。同时,洗脱过程依靠蠕动泵的吸力而不是推力实现洗脱剂的输送,明显降低了被分析物在洗脱过程中的分散,提高了原子吸收信号峰值(A)和浓集系数(EF)。增加了样品溶液排空步骤,保证了每次实验的准确性和重复性。进样流速6.0mL.min-1;进样时间60s,测定20μg.L-1的锌,EF由传统方法的9提高到28;检出限为0.35μg.L-1;测样频率为37.h-1;相对标准偏差(RSD,n=11)为2.1%。以0.1‰φ的三乙醇胺为掩蔽剂,在水样中的回收率为98.7%～99.6%。 |
| 关 键 词： | 流动注射 两步洗脱 火焰原子吸收 编结反应器 锌 |
Two steps elution method FI on-line adsorption and preconcentration coupled with FAAS for the determination of trace zinc |
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| Wang ZY,Zhang HK,Fang HD,Su YD,Mittal GS.Two steps elution method FI on-line adsorption and preconcentration coupled with FAAS for the determination of trace zinc[J].Spectroscopy and Spectral Analysis,2011,31(12):3384-3387. | |
| Authors: | Wang Zhong-yuan Zhang Hong-kang Fang Hong-da Su Yao-dong Mittal Gauri S |
| Institution: | WANG Zhong-yuan1,ZHANG Hong-kang2,FANG Hong-da1,SU Yao-dong3,Gauri S.Mittal4 1.South China Sea Environment Monitoring Center,State Oceanic Administration,Guangzhou 510300,China 2.College of Light Industry and Food,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China 3.Department of Chemistry,Tongji University,Shanghai 200092,China 4.University of Guelph,Guelph,Canada |
| Abstract: | A flow injection two steps elution method on-line sorption and preconcentration system coupled to flame atomic ab-sorption spectrometry(FAAS)was developed for the determination of trace Zn in water samples.The conventional elution pro-cedure was divided into two steps:elution procedure and detection procedure.During the elution procedure,the eluent waspumped into KR by the suction of the peristaltic pump and through PTFE tube instead of peristaltic pump tube.By the newmethod,the dispersion of the analyte wa... |
| Keywords: | Flow injection Two steps elution Flame atomic absorption spectrometry Knotted reactor Zinc |
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