1. Multi-element analysis of solid food materials via mixed standards pellet laser ablation inductively coupled plasma mass spectrometry.
- Author
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Jiang, Liwei, Zhou, Jianzong, Guo, Wei, Jin, Lanlan, and Hu, Shenghong
- Subjects
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LASER ablation inductively coupled plasma mass spectrometry , *INDUCTIVELY coupled plasma mass spectrometry , *FOOD chemistry , *MASS spectrometry - Abstract
Accurate monitoring of minor and trace elements in food is of great significance for maintaining human health. Although laser ablation inductively coupled plasma mass spectrometry technique (LA-ICP-MS) is well-established for the direct analysis of solid sample, the lack of an appropriate external standard for quantitative calibration remains the main challenge. Herein, we developed a novel calibration strategy based on the mixed fine-particulate food reference material pellets as the external standard to accurately measure the multi-elements in various solid food samples. Three in-house prepared pellet standards exhibited good homogeneity (RSD < 9%) and the limits of quantitation (LOQs) ranged from 0.0003 (Sr) to 0.86 μg g−1 (Ca). Analytical results of the food NIST reference materials and typical food samples were in good agreement with the certified or reference values, respectively. The proposed method is a promising alternative for routine elemental bulk and/or imaging analysis in food safety laboratories. [Display omitted] ● LA-ICP-MS via mixed pellet standard was validated for solid food. ● The proposed protocol complies with "Green Chemistry" principles. ● Micron-sized particles effectively improve uniformity and accuracy. ● The quantitative error for all 18 elements was within 20%. ● Screening method of elemental bulk and imaging analysis for food safety. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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