Closed Anaerobic Biotransformation Products of Organoarsenic Compounds in Fucus distichus
Table 1
Arsenic determination and speciation analysis on the decomposition products from Fucus distichus incubated in a closed anaerobic decomposition system using the semicontinuous mode HG-GC-AAS technique.
S/N
Closed system anaerobic decomposition
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
SF: Methanol filtrate extract
nd
nd
4.72
4.72
nd
nd
8.09
8.09
2
IF: Insoluble filtrate material
d
d
0.86
0.86
d
d
0.95
0.95
3
UR: Unextractable seaweed residue
—
—
—
—
8.04
0.30
8.70
17.04
4
SRA: Early eluting methanol seaweed extract
0.83
0.07
0.72
1.62
2.01
0.12
28.04
30.17
5
SRB: Late eluting methanol Seaweed extract
0.12
d
0.38
0.50
2.41
0.67
24.75
27.83
Total arsenic species
0.95
0.07
6.68
7.70
12.46
1.09
70.53
84.08
Main experiment: Seaweed + Seawater + Sediment samples. nd: not detected; d: detected; —: not determined; Inorg. As: inorganic arsenic, AsIII & AsV; MMAA: monomethylarsonic acid; DMAA: dimethylarsinic acid.
