Sample

Standard

Cd

Pb

Ni

Soil, ug·g^-1

Indian Standard Awashthi

3-6

250-500

75-150

WHO/FAO, 2007

-

-

-

European Union, 2002

3-0

300

75

Soil, mg·kg^-1

Canadian human quality health soil quality guideline

14

140

Plant, ug·g^-1

Indian Standard Awashthi

1.5

2.5

1.5

WHO/FAO, 2007

0.2

5.0

-

Commission regulation, EU, 2006

0.2

0.30

-

Leaf vegetables

European Union maximum levels in foods (mg·kg^-1 wet weight)

0.20 ^a

0.3b

Vegetables, excluding leaf vegetables

0.050 ^a

Stem vegetables, root vegetables, and potatoes

0.10 ^a