Table 4 Heavy metal concentrations (ppm) in different countries around the world

Nigeria

-

-

0.63 ± 0.24

-

0.59±0.01–0.56±0.02

-

Non-Brand

Ali et al. 2011

Iran

-

-

0.013±0.006

-

-

-

Non-Brand

Seyed and Ebrahim 2012

Palestine

0.054

-

0.93

-

0.66

12.91

Brand

Abdul et al. 2012

0.036

-

0.20

-

0.62

8.23

Non-Brand

Philippines

0.003 to 0.01

0.0008 to 0.001

-

-

-

-

Brand

Solidum et al. 2012

Egypt

0.288

-

4.404

-

2.836

16.38

Non-Brand

Farag et al. 2012

India

-

0.175 to 0.013

5.904 to 0.139

-

37.290 to 0.039

-

Brand

Zodape et al. 2012

Pakistan

1.97±0.40

-

0.68±0.15

-

-

-

Non-Brand

Mohammed et al. 2013

4.06±1.9

3.32±1.66

Brand

Saudi Arabia

-

-

0.01 to 0.02

-

0.16 to 0.42

1.13

Brand

Khalil and Seliem 2013

Libia

0.001

-

0.003

-

-

-

Non-Brand

Elatrash and Atoweir 2014

Ethiopia

-

0.064± 0.010

-

-

0.206±0.024

-

Non-Brand

Alem et al. 2015

Bangladesh

0.029±0.026

1.6± 0.41

0.20±0.23

-

2.3±1.2

-

Non-Brand

Islam et al. 2015

Bangladesh

0.053±0.022

0.672±0.010

0.033±0.006

0.092±0.02

0.163±0.031

0.486±0.077

Brand

Present study

Bangladesh

0.024±.009

0.373±.008

0.015±0.002

0.126±0.02

0.064±0.013

0.064±0.013

Dairy Cow Milk

Present study

Bangladesh

0.047±0.026

0.539±0.013

0.012±0.001

0.130±0.023

0.127±0.029

0.631±0.101

Domestic Cow Milk

Present study