Table 1 Background values (Bv), toxicity response factor (Tir).

B_v (mg kg⁻¹ )

0.08^a

17^c

75^b

15^a

60^a

30^a

0.20^b

T_ir

40^a

2^d

5^b

5^a

1^a

5^a

30^b

MAC (mg kg⁻¹)

0.5–5

75–100

100

200–300

100–300

60–150

3–8

Organization

Iran’s environment

7

110

110

75

500

200

5