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2007•Chinese Journal of Analysis LaboratoryRequires access

Determination of lead in tea by graphite furnace atomic absorption spectrometry

Chun Li

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Abstract

Amethod for the determination of lead in tea by graphite atomic absorption spectrometry,with NH4H2PO4 as a matrix modifier,which could enhance the ashing temperature and eliminate the matrix interference was proposed.The method is rapid,simple and accurate.Through determination for standard substance time after time,the results were in accordance with real values and the relative standard deviation was 2.8%.Test for recovery was made by the standard addition method,and recoveries were found in the range of 96%～105%,and the detection limit was 0.12 μg/L.

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What this paper is about

Amethod for the determination of lead in tea by graphite atomic absorption spectrometry,with NH4H2PO4 as a matrix modifier,which could enhance the ashing temperature and eliminate the matrix interference was proposed.The method is rapid,simple and accurate.Through determination for standard substance time after time,the results were in accordance with real values and the relative standard deviation was 2.8%.Test for recovery was made by the standard addition method,and recoveries were found in the range of 96%～105%,and the detection limit was 0.12 μg/L.

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Available abstract

Amethod for the determination of lead in tea by graphite atomic absorption spectrometry,with NH4H2PO4 as a matrix modifier,which could enhance the ashing temperature and eliminate the matrix interference was proposed.The method is rapid,simple and accurate.Through determination for standard substance time after time,the results were in accordance with real values and the relative standard deviation was 2.8%.Test for recovery was made by the standard addition method,and recoveries were found in the range of 96%～105%,and the detection limit was 0.12 μg/L.

Key concepts: Ashing, Chemistry, Detection limit, Graphite furnace atomic absorption, Relative standard deviation, Matrix (chemical analysis), Mass spectrometry, Analytical Chemistry (journal)

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