Determination of Arsenic in Drinking Water Samples by Electrothermal Atomic Absorption Spectrometry after Preconcentration Using the Biomass of Aspergillus niger Loaded on Activated Charcoal

Table 2

The effect of different amounts of eluents on the recovery of arsenic in the preconcentration procedure.

Number	Type of eluent	Conc. of eluent (M)	Recovery %
1	H2SO4	0.1	92.7
2	HCl	0.1	93.9
3	H2SO4	0.5	94.0
4	HCl	0.5	96.1
5	H2SO4	1	97.8
6	HCl	1	99.1