Determination of 8 inorganic elements in dried noodles by graphite digestion inductively coupled plasma mass spectrometry

doi:10.14088/j.cnki.issn0439-8114.2023.09.024

Abstract

Abstract: A graphite digestion inductively coupled plasma mass spectrometry method was established for the determination of 8 inorganic elements in dried noodles.After graphite digestion, the content of eight inorganic elements Na, Mg, K, Mn, Cu, Zn, Sr, and Ba in the dried noodles was determined by ICP-MS, and the determination conditions were optimized. Under the selected working conditions, each inorganic element exhibited a good linear relationship within the standard curve range, with a correlation coefficient of ≥ 0.999 5, a detection limit of 0.006 5~1.970 0 mg/kg, a relative standard deviation of precision of 0.7%~3.1%, a relative standard deviation of repeatability of 0.9%~4.7%, an average recovery rate of 88.2%~106.3%, and a relative standard deviation of 1.1%~5.3%. The method was used to determine the wheat standard substance GBW10011a, and the results were consistent with the standard reference value. The comparative analysis results of actual samples showed that there was no significant difference （P>0.05） between the graphite digestion inductively coupled plasma mass spectrometry method and the microwave digestion method of GB 5009.268-2016 “national food safety standard for the determination of multiple elements in food” （method 1）. The content of 8 inorganic elements in dried noodles ranged from high to low, including Na, K, Mg, Zn, Mn, Cu, Sr, and Ba. The graphite digestion inductively coupled plasma mass spectrometry method was easy to operate, had good stability, and reliable results, providing a reference for the determination of 8 inorganic elements in dried noodles.

Key words: graphite digestion, inductively coupled plasma mass spectrometry （ICP-MS）, the dried noodles, inorganic elements

CLC Number:

O657.63

YANG Wei, LI Rong, MAO Yong-yang, YANG Zi-qiu, LI Tao, DUAN Bao-zhong. Determination of 8 inorganic elements in dried noodles by graphite digestion inductively coupled plasma mass spectrometry[J]. HUBEI AGRICULTURAL SCIENCES, 2023, 62(9): 130-134.

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