Determination of 25 Elements in Acid Soup by Microwave Digestion and Inductively Coupled Plasma Mass Spectrometry
A microwave digestion and inductively coupled plasma mass spectrometry method for the determination of 25 elements in acid soup was established to reduce the interference between MS and non-MS,optimized test conditions.The results showed that the linear correlation coefficient was good(R≥0.999 4),the relative standard deviation of the method was 0.6%～7.9%(n=6),and the average recovery rate was 80.5%～104.2%.The detection limit is 0.000 05～1.360 00 mg·kg-1.It shows that this method has high accuracy and precision for the determination of mineral elements in white sour soup.Through the analysis of 9 sour soups,a total of 25 elements were detected in red sour soup and 19 elements were detected in white sour soup.In general,there was a significant difference between red sour soup and white sour soup.Among the major elements,the Na content in red sour soup was the highest,which was several thousand times that in white sour soup.The K content in red sour soup was 2 713.0～3 087.7 mg·kg-1,and that in white sour soup was 6.80～43.6 mg·kg-1.The higher content of essential trace elements were Fe,Mn and Zn.
inductively coupled plasma mass spectrometrysour soupelementsmicrowave digestion
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