Method Development for Direct Multielement Quantification
by LA-ICP-MS in Food Samples
Version 2 2019-01-10, 21:16
Version 1 2019-01-10, 20:35
Posted on 2019-01-10 - 21:16
A novel calibration strategy for
the accurate determination of
essential and toxic elements in both plant-based and animal-based
foods was developed by synthesizing spiked agarose gels as matrix-matched
external standards and carbon as the internal standard (IS). Aqueous
solutions of agarose (4%, m/v) with defined amounts of the analytes
were cast on a mold and then dried to form the agarose-gel standards.
The spatial distributions of the analytes in the gel were examined
using surface- and depth-mapping laser ablation–inductively
coupled plasma mass spectrometry (LA-ICP-MS) protocols, and the gel
homogeneity was found to be excellent (i.e., relative standard derivation
<10%). Recovery of the 19 spiked elements in the gel standards
was in the range of 86.9–94.7%. The limits of detection (LODs)
ranged from 0.0005 (Rb) to 33.7 μg g–1 (S).
Analysis results were in good agreement with certified values for
various certified reference materials (CRMs). Furthermore, a porous
rubber sample supporter was developed to improve the analysis throughput
by about 3-fold.
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Li, Yatai; Guo, Wei; Hu, Zhaochu; Jin, Lanlan; Hu, Shenghong; Guo, Qinghai (2019). Method Development for Direct Multielement Quantification
by LA-ICP-MS in Food Samples. ACS Publications. Collection. https://doi.org/10.1021/acs.jafc.8b05479
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AUTHORS (6)
YL
Yatai Li
WG
Wei Guo
ZH
Zhaochu Hu
LJ
Lanlan Jin
SH
Shenghong Hu
QG
Qinghai Guo