Location: Microbial and Chemical Food Safety
Title: Dilute-and-shoot ICPMS quantification of V, Ni, Co, Cu, Zn, As, Se, Ag, Cd, Ba, and Pb in fruit juices based on matrix overcompensation calibrationAuthor
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Submitted to: Analytical and Bioanalytical Chemistry
Publication Type: Peer Reviewed Journal Publication Acceptance Date: 11/24/2023 Publication Date: 12/7/2023 Citation: Chen, G., Lai, B. 2023. Dilute-and-shoot ICPMS quantification of V, Ni, Co, Cu, Zn, As, Se, Ag, Cd, Ba, and Pb in fruit juices based on matrix overcompensation calibration. Analytical and Bioanalytical Chemistry. 416:839-847. https://doi.org/10.1007/s00216-023-05071-1. DOI: https://doi.org/10.1007/s00216-023-05071-1 Interpretive Summary: Multielemental analysis in fruit juices was performed by inductively coupled plasma mass spectrometry (ICPMS) after a simple 50-fold dilution. Four internal standards were used to correct instrumental drifts and matrix effects caused by easily ionizable elements. Ethanol was added to overwhelm native organic components and dominate matrix effects. A universal calibration curve was built from a likewise treated standard series. This novel matrix overcompensation calibration (MOC) effectively compensated matrix effects of carbon origin and achieved quantitative recoveries and detection limits for regulatory monitoring. MOC renders a calibration curve universally applicable to fruit juices of diversified origins resulting in cost saving and enhanced productivity. Technical Abstract: Analysis of V, Co, Ni, Cu, Zn, As, Se, Ag, Cd, Ba, and Pb in fruit juices was performed by inductively coupled plasma mass spectrometry (ICPMS) after simple a 50-fold dilution in 1% HNO3'0.5% HCl'5% ethanol (v/v). Ethanol was added to overwhelm native organic components and dominate matrix effects. A universal calibration curve was built based on a likewise treated reagent standard series. A new matrix overcompensation calibration (MOC) strategy was developed to effectively compensate matrix effects of carbon origin and achieved quantitative (92.5-118.8%) recoveries comparable to those by standard addition calibration (92.1-117.8%) and microwave-aided digestion (99.3-116.8%). The LODs were 0.528, 0.204, 0.195, and 2.07 ng mL-1 for toxic elements As, Cd, Pb, and Ni, respectively, adequate for their regulatory monitoring. Ge, Rh, Tb, and Ir were used as internal standards. MOC renders a calibration curve applicable to any clear fruit juices of diversified crop, geographic, and manufacturer origins resulting in cost saving and enhanced productivity. |
