Table 3.

Contribution of rice consumption to maximum tolerable daily intake calculations using total rice-bound As, inorganic As, and bioavailable As.

				Contribution to MTDI (%) based on:
Rice Variety	Total As (μg/kg)	Organic Asa (μg/kg)	Inorganic Asa (μg/kg)	Total Asb	Inorganic Asc	As bioavailabilityd
Parijae	210	50	124	74	43	49
Minikete	220	35	189	77	66	70
BRRIdhan29e	300	33	213	105	75	78
Whitef	760	106	509	266	178	190
Long Whitee	400	260	80	140	28	58
Long Browne	340	153	139	119	49	66
Basmati Whitee	50	12	33	18	12	13
Basmati Whiteg	32	0	32	11	11	11
Basmati Browne	70	4	43	25	15	16
Medium Risottoe	220	84	143	77	50	60
Arborioh	210	65	139	74	49	56
Paellae	170	51	82	60	29	35
Long Jasminee	110	26	81	39	28	31
Grounde	200	56	102	70	36	42
Long Wildi	110	9	84	39	29	30
Not specifiedj	410	25	361	144	126	129
Questg	1,250	1,075	175	438	61	185
Instant Whitek	305	271	31	107	11	42
Long Whitek	236	146	83	83	29	46
Not specifiedj	150	44	113	53	40	45

^aOrganic and inorganic As concentrations were calculated from percentage values presented in Table 1.

^bThe contribution to MTDI As values (%) was calculated using consumption of 0.42 g rice dry weight/day for a 60-kg person and the total As concentration for each rice variety.

^cThe contribution to MTDI As values (%) was calculated using consumption of 0.42 g rice dry weight/day for a 60-kg person and the concentration of inorganic As for each rice variety.

^dThe contribution to MTDI As values (%) was calculated using consumption of 0.42 g rice dry weight/day for a 60-kg person, the concentration of organic and inorganic As and bioavailability factors of 0.33 and 1.0 for organic and inorganic As respectively. DMA was assumed to represent the organic As fraction.

^eWilliams et al. 2005.

^fSchoof et al. 1998.

^gThis study.

^hD’Amato et al. 2004.

ⁱHeitkemper et al. 2001.

^jKohlmeyer et al. 2003.

^kAckerman et al. 2005.