Country

Location

Period

Size

Na⁺

K⁺

Ca²⁺

Cl⁻

Br⁻

Reference

Bangladesh

Dhaka

1.2013-2.2013

PM_2.5

1.30

8.11

3.09

0.16

1.19

0.16

7.75

5.30

Current study

Bangladesh

Dhaka

04.2001-05.2001

TSP

1.27

1.55

6.83

0.11

2.03

-

3.63

11.3

[7] Salam et al. 2003

China

Nanchang

6.2009

PM_2.5

6.92

1.18

2.57

-

1.62

-

2.75

28.9

[31] Huang et al. 2012

Taiwan

Kaohsiung

11.1998-4.1999

PM_2.5

2.79

-

0.03

-

3.07

-

12.8

17.8

[28] Lin et al. 2002

Japan

Yokohama

9.2007-8.2008

PM_2.5

0.25

0.13

0.20

-

0.21

-

0.96

3.8

[29] Khan et al. 2010

Singapore

Singapore

1.2000-12.2000

PM_2.5

0.60

0.53

0.29

-

0.60

-

0.90

5.0

[30] Karthikeyan et al. 2006

Spain

Alicante

9.2005-8.2006

PM_2.5

0.34

0.28

0.75

-

0.52

-

1.53

4.2

[31] Galindo et al. 2011

Switzerland

Bern

4.1998-3.1999

PM_2.5

0.094

0.18

0.132

-

0.102

-

3.0

2.8

[32] Hueglin et al. 2005

India

Chhattisgarh

7.2009-6.2010

PM_2.5

1.08

0.87

0.70

-

2.06

-

3.16

6.75

[26] Dhananjay et al. 2011