Determination of arsenic species and arsenosugars in marine samples by HPLC-ICP-MS.
Arsenic-speciation analysis in marine samples was performed by high-pressure liquid chromatography (HPLC) with ICP-MS detection. Separation of eight arsenic species--As(III), MMA, DMA, As(V), AB, TMAO, AC and TeMAs(+)--was achieved on a C(18) column with isocratic elution (pH 3.0), under which conditions As(III) and MMA co-eluted. The entire separation was accomplished in 15 min. The HPLC-ICP-MS detection limits for the eight arsenic species were in the range 0.03-0.23 microg L(-1) based on 3 sigma for the blank response (n=5). The precision was calculated to be 2.4-8.0% (RSD) for the eight species. The method was successfully applied to several marine samples, e.g. oysters, fish, shrimps, and marine algae. Low-power microwave digestion was employed for extraction of arsenic from seafood products; ultrasonic extraction was employed for the extraction of arsenic from seaweeds. Separation of arsenosugars was achieved on an anion-exchange column. Concentrations of arsenosugars 2, 3, and 4 in marine algae were in the range 0.18-9.59 microg g(-1).
Hirata
Shizuko
S
National Institute of Advanced Industrial Science and Technology (AIST), Kure 737-0197, Japan. s-hirata@aist.go.jp
Toshimitsu
Hideki
H
D000818:Animals; D001149:Arsenates / Q000032:analysis* / Q000737:chemistry*; D001152:Arsenicals / Q000032:analysis* / Q000737:chemistry*; D049872:Bivalvia / Q000737:chemistry; D002851:Chromatography, High Pressure Liquid; D056890:Eukaryota / Q000737:chemistry; D005399:Fishes; D005506:Food Contamination / Q000032:analysis; D008386:Marine Biology; D013058:Mass Spectrometry; D009005:Monosaccharides / Q000032:analysis* / Q000737:chemistry*; D017747:Seafood / Q000032:analysis*; D012680:Sensitivity and Specificity; D014873:Water Pollutants / Q000032:analysis*
D001149:Arsenates; D001152:Arsenicals; D009005:Monosaccharides; D014873:Water Pollutants; C449161:arsenosugar