Determination of Five Metal Elements in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Rolution-Continuum Source Graphite Furnace Atomic Absorption Spectrometry

doi:10.7506/spkx1002-6630-201424053

Abstract

Abstract:

A fast and effective method was developed for the determination of Cu, Al, Cr, Cd and Pb in leisure foods
by incomplete digestion-microemulsion sampling-high resolution-continuum source graphite furnace atomic absorption
spectrometry. The samples were digested by incomplete digestion and the conditions for forming microemulsion were
studied using N-butyl alcohol as an auxiliary emulsifier. The effects of matrix modifier, modifier volume, ashing temperature
and atomizing temperature on absorbance and absorption peak were investigated. The optimum parameters for determining
Cu, Al, Cr, Cd and Pb were chosen, respectively. The results showed a good agreement with the results obtained by the
conventional method, using incompletely digested and microwave digested samples. The recoveries for spiked samples
ranged from 96.4% to 105.6%. Therefore, the proposed method is rapid, accurate and stable with a high practical value. It
may provide a scientific basis for multi-element determination of leisure foods.

Key words: incomplete digestion, microemulsion, high resolution-continuum source graphite furnace atomic absorptionspectrophotometry (HR-CS GFAAS), leisure food, metal element

CLC Number:

O657.31

LIU Quan-de1,2, CHEN Shang-long1,2, ZHANG Jian-ping1,2, LI Tong-xiang1,2, LIU Hui1,2, LIU Yi1. Determination of Five Metal Elements in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Rolution-Continuum Source Graphite Furnace Atomic Absorption Spectrometry[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201424053.

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Determination of Five Metal Elements in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Rolution-Continuum Source Graphite Furnace Atomic Absorption Spectrometry

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