期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 189, 期 1-2, 页码 609-613出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2011.02.019
关键词
Nanometer TiO2; Hydride generation atomic absorption spectrometry; Mercury; Selenium; Nanometer TiO2-coated quartz tube atomizer
资金
- National Natural Science Foundation of China [20775067, 20977074]
- Outstanding Youth Science Foundation of Fujian Province, China [2010J06005]
- Science & Technology Committee of Fujian Province, China [2008F5063]
- Program for New Century Excellent Talents in Fujian Province University [200720]
The nanometer TiO2 particle was coated onto the inner wall of a T-shaped quartz tube atomizer (QTA) and then was used as a new atomizer (NT-QTA) for the determination of Hg and Se by hydride generation atomic absorption spectrometry (HGAAS). After coating 67.4 mg TiO2 on a quartz tube, the analytical performance of NT-QTA-HGAAS was compared to conventional QTA-HGAAS and it was improved as follows: (a) the linear range of the calibration curves was expanded from 10.0-80.0 ng mL(-1) to 5.0-150.0 ng mL(-1) for Hg, and from 10.0-70.0 ng mL(-1) to 5.0-100.0 ng mL(-1) for Se; (b) the characteristic concentration of was decreased from 2.8 ng mL(-1)/1% to 1.1 ng mL(-1)/1% for Hg and from 1.2 ng mL(-1)/1% to 0.8 ng mL(-1)/1% for Se: and (c) the interference from the coexistence of As on the determination of Hg and Se could be eliminated. The achieved technique was applied for the determination of Hg and Se in herbal medicines and hair. (C) 2011 Elsevier B.V. All rights reserved.
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