NDLI: Determination of Trace Pb in Environmental Samples by GF-AAS after Microsphere Phase Separation Extraction

Content Provider	IEEE Xplore Digital Library
Author	Wei Guo Wenjuan Liu Shesheng Jin Shenghong Hu Hongfei Zhang Yuee Peng
Copyright Year	2008
Description	Author affiliation: Lab. of Circulation Ind. Promotion Center, Minist. of Commerce of the People's Republic of China, Beijing (Wei Guo; Wenjuan Liu; Shesheng Jin)
Abstract	A novel method is described for preconcentration and separation of trace Pb in environmental samples such as water, soil, plant and sediment using a microsphere phase separation extraction. After complexation with 2-[5-Bromo-2-pyridylazo]-5-diethylamino-phenol (5-Br-PADAP) in alkalescent medium, the analytes are extracted to 1-octanol in the present of co-solvent alcohol, and then adding water to change the phase ratio, the contained 5-Br-PADAP-Pb microsphere phase (200 muL) separates out from the homogeneous solution, later the microsphere introduced into the graphite furnace (GF) and detected by atomic absorption spectrometry (AAS). The graphite furnace apparatus conditions such as pyrolysis or atomization temperature and the chemical variables affecting the separation phase were optimized. Detection limit (3 sigma) of 0.05 mug/L, along with enrichment factors of 35 for Pb was achieved. The develop method was applied to the determination of trace lead in a series environmental reference materials. All of the results were found to be in reasonable agreement with the certified values. This simple method shows a great potential for determination other trace metals in environmental samples.
Starting Page	4504
Ending Page	4507
File Size	228457
Page Count	4
File Format	PDF
ISBN	9781424417476
DOI	10.1109/ICBBE.2008.286
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-05-16
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Temperature Absorption Atom optics Furnaces Clouds Lead Sampling methods Mass spectroscopy Phase detection Organic compounds
Content Type	Text
Resource Type	Article

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