Table 2 Metal concentrations in various size fractions of household dust from Shanghai

Al

1.65 × 10³

2.93 × 10³

3.81 × 10³

1.04 × 10⁴

As

3.50

5.60

8.28

9.47

Ba

276

315

352

367

Cd

2.15

2.80

2.70

1.01

Co

1.78

2.72

4.05

6.46

Cr

16.0

20.9

23.0

26.2

Cu

175

181

206

269

Fe

1.62 × 10³

2.92 × 10³

3.73 × 10³

6.06 × 10³

Ga

244

283

319

346

Mn

125

192

242

340

Ni

41.1

54.1

39.0

42.0

Pb

63.1

146

143

134

Tl

n.d.

n.d.

n.d.

n.d.

U

0.09

0.20

0.26

0.84

V

5.70

9.76

12.6

23.5

Zn

695

701

840

955