Characterization of Arsenic Biotransformation Products from an Open Anaerobic Degradation of Fucus distichus by Hydride Generation Gas Chromatography Atomic Absorption Spectrometry and High Performance Liquid Chromatography Inductively Coupled Plasma Mass Spectrometry

Table 1

Arsenic speciation in the anaerobic decomposition products of F. distichus by the semicontinuous mode HG-GC-AA analysis.

Number	Open anaerobic decomposition extract	3-hour hot base digestion (2 M NaOH, 5 mL)
		Arsenic before digestion (in μg)				Arsenic after digestion (in μg)
		Inorg. As	MMAA	DMAA	Total As	Inorg. As	MMAA	DMAA	Total As
1	Seaweed	1.88	d	3.44	5.32	3.84	d	11.34	15.18
2	Filtrate	1.33	d	5.55	6.88	1.50	d	9.93	11.43

d: detected; Inorg. As: inorganic arsenic; MMAA: monomethylarsonic acid; DMAA: dimethylarsinic acid.