Determination of Selenium in Nanyang Colored Wheat by Intermittent Flow-Double Channel-Atomic Fluorescence Spectrometry after Microwave Digestion

doi:10.7506/spkx1002-6630-201312054

Abstract

Abstract:

An analytical method for the determination of selenium in Nanyang colored wheat was presented by intermittent
flow-hydride generation (by using acidic KBH4 system)-atomic fluorescence spectrometry (HGAFS) after microwave
digesiton with nitric acid-perchloric acid. Under optimized conditions, the calibration curve of selenium standard solution
showed a good linear relationship over the range of 0－24 μg/L (r = 0.9996). The average recovery for spiked sampled was
99.42%, and a relative standard deviation (RSD) of 2.6% was obtained from 11 parallel determinations. Five wheat cultivars
were ranked in decreasing order of selenium content (on a dry matter basis): Nanyang grey, Yanmai 4110, Nanyang blue,
large purple and small purple. The method was characterized by simple operation, low volatile loss of selenium during
sample digestion, low matrix interference and high applicability.

Key words: microwave digestion, intermittent flow injection, Nanyang colored wheat, hydride generation atomic fluorescence spectrometry (HGAFS), selenium

GAO Xiang-yang，GAO Xin-zhen，ZHU Ying-rui，ZHANG Pin. Determination of Selenium in Nanyang Colored Wheat by Intermittent Flow-Double Channel-Atomic Fluorescence Spectrometry after Microwave Digestion[J]. FOOD SCIENCE, doi: 10.7506/spkx1002-6630-201312054.

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Determination of Selenium in Nanyang Colored Wheat by Intermittent Flow-Double Channel-Atomic Fluorescence Spectrometry after Microwave Digestion

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