Probabilistic Risk Assessment of Inorganic Arsenic via Consumption of Herbs Collected in Thailand

Table 2

Accuracy (% recovery) and precision (% RSD) in determination of total and inorganic arsenic in herbs.

Arsenic spiked; (ng/g)	Intraday (n = 6)			Interday (n = 6)
	Found; (ng/g); (mean ± SD)	RSD; (%)	Recovery (%)	Found; (ng/g); (mean ± SD)	RSD; (%)	Recovery (%)
Total arsenic
250	244 ± 8.53	3.49	97.7	237 ± 6.68	2.82	94.9
500	473 ± 13.6	2.88	94.6	478 ± 21.2	4.43	95.6
1000	945 ± 32.6	3.45	94.5	972 ± 48.5	5.00	97.2
2500	2,370 ± 41.4	1.75	94.7	2.38 × 10^3 ± 40.5	1.70	95.3
Inorganic; arsenic
50	47.4 ± 2.54	5.37	94.8	47.7 ± 2.57	5.38	95.3
100	98.1 ± 4.81	4.91	98.1	97.9 ± 3.36	3.43	97.9
500	469.8 ± 25.2	5.35	94.0	473 ± 21.9	4.63	94.6
1000	943.8 ± 13.4	1.42	94.4	941 ± 11.1	1.18	94.1