Determination of Arsenic and Its Species in Dry Seafood by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry

Arsenic and its species in dry seafood products(DSPs) Kelp, Sargassum fusiform, Laver, Enteromorpha prolifera, were systematically determined by high performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS). It was found that the of arsenic species in botanic DSPs are three unknown arsenicals (U-2, U-3 andU(4)), which are speculated as arsenosugars and take approximate 63.5% 92.7% of all arsenic species detected. These arsenosugars were identified as dimethylarsinic (DMA)-glycerol ribose, DMA-phosphate ribose and DMA-sulfate ribose by their accuracy molecular weight 329.0599, 483.0738 and 409.0162, using direct confirmatory of HPLC-TOF-MS. The quantitative analysis of these arsenic species shows that although the total arsenic exceeds the National Standard value, most of the marine plants DSPs are safe to eat. The main component in most marine plants is DMA-sulfale ribose (51.1%-80.3%), while the main component of Kelp is DMA-phosphate ribose (48.9%). The sum or those. three arsenosugar was 63.5%-92.7% of peak areas in all arsenic species detected.