Sample (n = 3)

Gardens

Cr (Mean ± SE) µg/g

Pb

Arrowroots

Control

2.03 ± 0.02^a

U001

2.45 ± 0.02^b

0.86 ± 011^f

U002

2.73 ± 0.04^c

0.94 ± 0.32^d

U003

3.72 ± 0.04^f

0.43 ± 0.05^e

U004

3.05 ± 0.02^d

0.32 ± 0.02^d

U005

3.36 ± 0.05^e

0.46 ± 0.01^c

U006

2.63 ± 0.02 ^c

0.65 ± 0.02^e

P-value

<0.001

<0.001

Amaranthus

Control

1.55 ± 0.02^a

U001

3.72 ± 0.03^f

0.34 ± 0.07^d

U002

4.32 ± 0.03^g

0.35 ± 0.02^a

U003

3.25 ± 0.04^e

0.79 ± 0.02^d

U004

2.99 ± 0.01^d

0.31 ± 0.01^a

U005

2.09 ± 0.02^b

0.33 ± 0.08^a

U006

2.56 ± 0.02^c

0.14 ± 0.01^b

P-value

<0.001

<0.001

Spinach

Control

1.15 ± 0.02^a

U001

2.64 ± 0.03^d

0.02 ± 0.17^c

U002

2.44 ± 0.01^c

0.32 ± 0.16^e

U003

2.65 ± 0.06^d

0.44 ± 0.14^c

U004

2.38 ± 0.04^c

0.21 ± 0.18^f

U005

4.07 ± 0.01^e

0.62 ± 0.32^d

U006

1.80 ± 0.05^b

0.45 ± 0.07^c

P-value

<0.001

<0.001

Kales

Control

2.35 ± 0.06^a

U001

2.58 ± 0.02^a

0.75 ± 0.01^a

U002

3.35 ± 0.04^c

0.84 ± 0.02^b

U003

2.57 ± 0.03^a

0.63 ± 0.01^a

U004

2.95 ± 0.01^b

0.44 ± 0.00^a

U005

3.16 ± 0.03^c

0.86 ± 0.03^c

U006

3.01 ± 0.03^b

0.91 ± 0.06^d

P-value

<0.001

<0.001

Permissible levels of [28]

1

0.43