Reversed Phase Column HPLC-ICP-MS Conditions for Arsenic Speciation Analysis of Rice Flour
作者： Tomohiro NARUKAWA , Eri MATSUMOTO , Tsutomu NISHIMURA , Akiharu HIOKI
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摘要: New measurement conditions for arsenic speciation analysis of rice flour were developed using HPLC-ICP-MS equipped with a reversed phase ODS column. Eight species, namely, arsenite [As(III)], arsenate [As(V)], monomethylarsonic acid (MMAA), dimethylarsinic (DMAA), trimethylarsine oxide (TMAO), tetramethylarsonium (TeMA), arsenobetaine (AsB) and arsenocholine (AsC), separated determined under the proposed conditions. In particular, As(III) MMAA DMAA AsB completely newly eluent containing ammonium dihydrogen phosphate. Importantly, sensitivity changes, in particular those As(V) caused by coexisting elements complex matrix composition, which had been problematical previously reported methods, eliminated. The new can be applied to C8, C18 C30 columns same effectiveness excellent repeatability. analytical method was successfully extracts certified reference materials.
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