A New Candidate Reference Material for Inorganic Arsenic and Arsenosugars in Hijiki Seaweed: First Results from an Interlaboratory Study

被引：0
|
作者：
Tomohiro Narukawa
Georg Raber
Nobuyasu Itoh
Kazumi Inagaki
机构：
[1] National Institute of Advanced Industrial Science and Technology (AIST),National Metrology Institute of Japan (NMIJ)
[2] University of Graz,Institute of Chemistry
来源：
Analytical Sciences | 2020年 / 36卷
关键词：
Hijiki seaweed; speciation; inorganic arsenic; arsenosugar compounds; validation;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
An inter-laboratory study was carried out to characterize a candidate hijiki seaweed for its concentrations of total arsenic and water-soluble arsenic compounds, particularly arsenosugar compounds. The candidate material, a dried hijiki seaweed powder, was analyzed by individual techniques in two laboratories. The water-soluble arsenic compounds were separated by anion exchange, and reversed-phase columns, and As(V), DMA and four kinds of arsenosugars, namely glycerol (-OH), phosphate (-PO4), sulfonate (-SO3), and sulfate (-SO4) types were detected by HPLC-ICP-MS. The methods applied were validated by analyzing a second sample, the NMIJ CRM 7405-a hijiki seaweed, which is certified for both total arsenic and As(V). Techniques for the inter-laboratory study, extraction efficiencies under different extraction conditions, some chromatographic techniques and sequential extraction were investigated. The results from the two laboratories for the candidate hijiki material showed good agreement within the measurement uncertainties for total and water-soluble arsenic compounds.
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页码：233 / 237
页数：4
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