Table 2.

Arsenic concentrations in the tissues of the animals on exposure to sodium arsenite and sodium arsenate for 12 weeks through drinking water

	Sodium arsenite				Sodium arsenate
	Arsenic dose				Arsenic dose
Tissue	Control	50 ppm	100 ppm	150 ppm	Control	100 ppm	150 ppm	200 ppm
Blood (μg/ml)	11.24 ± 2.35a	304.99 ± 15.43b	300.85 ± 18.89b	257.62 ± 12.61c	23.60 ± 2.99a	228.44 ± 31.07b	267.10 ± 13.79c	273.23 ± 14.33c
Liver (μg/g wet weight)	1.73 ± 0.07a	19.92 ± 2.16b	14.85 ± 1.07c	22.44 ± 3.02b	3.54 ± 0.26a	10.03 ± 0.58b	19.32 ± 3.93c	14.19 ± 0.96d
Kidney (μg/g wet weight)	2.06 ± 0.16a	5.56 ± 0.28b	39.54 ± 1.95c	27.36 ± 2.03d	2.06 ± 0.16a	6.31 ± 0.37b	32.84 ± 3.09c	47.90 ± 2.99d
Brain (μg/g wet weight)	0.69 ± 0.05a	3.11 ± 0.24b	24.88 ± 2.57c	35.21 ± 4.33d	1.74 ± 0.15a	18.95 ± 1.81b	31.65 ± 2.15c	22.11 ± 2.10d
Heart (μg/g wet weight)	0.20 ± 0.03a	16.54 ± 1.11b	53.54 ± 5.57c	46.01 ± 2.30c	0.02 ± 0.03a	42.16 ± 2.39c	18.80 ± 3.46b	27.98 ± 2.99b
Lung (μg/g wet weight)	0.71 ± 0.03a	4.97 ± 0.45a	28.73 ± 3.73b	33.20 ± 4.67b	0.75 ± 0.02a	6.64 ± 0.88a	44.80 ± 7.18b	28.39 ± 4.62b
Spleen (μg/g wet weight)	3.37 ± 0.29a	40.35 ± 2.92b	38.08 ± 1.60b	58.32 ± 5.08c	5.88 ± 0.33a	20.66 ± 2.14b	31.41 ± 3.40b	23.12 ± 1.06b

Each value represents the mean ± S.E.M. of 7 rats. Values within a row with different alphabets for each arsenic compound are significantly different at p < 0.05