Determination of impurity elements in food leavening agents by high resolution inductively coupled plasma mass spectrometry

Abstract

Abstract:

The determination of trace elements in food leavening agents NaHCO3 including Be, Mg, Al, Ca, Cr, Mn, Fe, Ni, Cu, Zn, As, Cd, Hg and Pb by high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) has been investigated. Samples were decomposed by HNO3 followed by dilution with ultrapure water then the above 14 elements in the solution was analyzed directly by HR-ICP-MS. To overcome some potentially problematic spectral interference, measurements were acquired in both low and medium resolution modes. The internal standards of Ge, In and Bi can significantly improve the long time stability and precision level of determination. The method was shown to be very sensitive with limits of quantification in the range of 0.008～21.62 μg/L for all investigated elements, the recovery of the samples was in the range of 92.60%～110.00% and the relative standard deviation(RSD) less than 2.39%.

CLC Number:

O657.63

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