Determination of Mg and Al Contents in Sunflower Seed Shells and Nuts by Microwave Digestion-ICP-MS

Abstract:

This study was to establish a microwave digestion-ICP-MS method for the simultaneous determination of Mg and Al contents in sunflower seeds (shells and nuts). With a microwave pre-digestion, 45Sc as internal standard to control the dynamic drift of the signal and an ICP-MS analytical method, Mg and Al recoveries were between 95%~105%, detection limits were separately 0.01 mg/kg and 0.001 mg/kg, and linear correlation coefficient was 1.000 0 (RSD≤2%). The values obtained through the same method for the National Standard Rice [GBW10010 (GSB-1)] were also within the standard range. Therefore, the detection limit, precision and accuracy of the method meet the requirements for determination of Mg and Al contents in sunflower seed shells and nuts, and this method supports to improve quality control standards for sunflower.