When 0.5 μg of As(III) and As(V) were added to 50 mL of test water coexisting with 100 μg/L Al3+, 10 μg/L V5+ (H2VO4-
), 10 μg/L Cr3+ (H2CrO2+), 10 μg/L Mn2+, 100 μg/L Fe3+,10 μg/L Ni2+, 10 μg/L Cu2+, 100 μg/L Zn2+, 300 μg/L Sr2+,
and 10 μg/L Pb2+, the recoveries of As(III) and As(V) were 108 % and 107 %, respectively.