石墨炉原子吸收光谱法直接测定生态纺织品萃取汗液中痕量铅

doi:10.3964/j.issn.1000-0593(2009)11-3150-04

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Abstract Extractable trace level lead in artificial sweat solution from ecological textiles is a key item limited by eco-textile standard. But the content of this extractable Pb is not so easy to determine for the strict limit of eco-textile standard, the complicatedness of extractable solution matrix and the strong background interference of NaCl. In the present paper a method for the determination of trace extractable lead in artificial acid sweat from ecological textiles by graphite furnace atomic absorption spectrometry (GFAAS) is described. Based on a number of experiments by using different single and mixed matrix modifiers including (NH₄)₂H₂PO₄, NH₄NO₃, Pd(NO₃)₂, Ni(NO₃)₂ and ascorbic acid，an effective modifier and its quantity were selected and the graphite furnace operating parameters were optimized. Experimental test results revealed that adding 5 mL (1∶1) mixed solution of 50 g·L^-1 ammonium nitrate and 100 mg·L^-1 palladium regent was an effective way to inhibit volatile lead and reduce background signals. The detection limit could reach a low level of 0.7 μg·L^-1. The relative standard deviation was 3.2%. Under the optimum experimental conditions, the recoveries ranged between 95.5% and 105%.

Key words：GFAAS;Ecological textiles;Extractable lead

Received: 2008-11-30 Accepted: 2009-03-06

ZTFLH:

O657.3

Corresponding Authors: LIU Chong-hua E-mail: liuch@iqtc.cn

Cite this article:

LIU Chong-hua,FANG Han,LIN Xiao-yang, et al. Determination of Trace Extractable Lead in Artificial Acid Sweat from Ecological Textiles by GFAAS [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2009, 29(11): 3150-3153.

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https://www.gpxygpfx.com/EN/10.3964/j.issn.1000-0593(2009)11-3150-04 OR https://www.gpxygpfx.com/EN/Y2009/V29/I11/3150

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