The inorganic arsenic (iAs) concentration was measured in 44 rice product samples, covering a wide range, using both hydride generation (HG) ICP-MS and HPLC-ICP-MS. Linear regression showed good linearity (R2 of 0.99) with a slope close to 1 (0.969 ± 0.015) and similar sensitivity showing that HPLC can robustly be replaced by a simple HG system, shortening the measurement time and resulting in easier data treatment as no manual integration of peaks is necessary. With upcoming regulations on the iAs concentration in rice in the EU, it is important that regulators do not prescribe only one standard method since it excludes new instrumental developments.
Bibliographical noteThe authors thank Agilent Technology for the loan of the 8800 ICP-MS. A. Petursdottir thanks the Icelandic research fund for graduate students for the financial support. N. Friedrich thanks the ERASMUS program. S. Musil is grateful to Institute of Analytical Chemistry AS CR, v. v. i. (Institutional Research Plan RVO:68081715), to the Academy of Sciences of the Czech Republic (project no. M200311271) and Journal Grant for International Authors programme by Royal Society of Chemistry that sponsored his visit in TESLA lab. We thank C. Cornelius
Brombach for the graphical illustrations.
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Jörg Feldmann (Participant), Andrew Alexander Meharg (Participant), Andrea Raab (Participant) & Eva Maria Krupp (Participant)