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Table 1 Particle exposure measures

From: Occupational quartz and particle exposure affect systemic levels of inflammatory markers related to inflammasome activation and cardiovascular disease

Personal measurements (mg/m3)

N

AM

SD

GM

GSD

Min

Max

Respirable dust

72

1.3

2.05

0.57

3.5

0.058

11

Respirable dust, resp. adj

72

0.65

0.57

0.43

2.8

0.058

2.5

Respirable quartz

72

0.066

0.18

0.016

4.6

0.0012

1.0

Respirable quartz, resp. adj

72

0.020

0.022

0.011

3.4

0.0011

0.10

Stationary measurements (mg/m3)

 Inhalable dust

24

4.7

6.62

3.1

2.8

0.77

35

 Respirable dust

24

1.14

0.95

0.83

2.2

0.22

3.7

 Respirable quartz

24

0.026

0.032

0.014

3

0.0018

0.14

 PM10

24

2.74

2.47

2.1

2.1

0.54

11.7

 PM2.5

24

1.52

2.39

0.81

2.8

0.16

11.7

 PM1 (ultrafine)

24

0.40

0.41

0.26

2.6

0.040

1.84

Total particle area

 (A-trak) µm2/cm3

24

560

576

311

3.3

32

2600

Particle number

 (P-trak)/cm3

24

134 774

111 109

90 245

2.6

15 800

467 600

  1. Different PM exposure measures (8-h time weight average levels) measured at two Swedish iron foundries. The personal measurements include 72 measurements from 40 individuals (32 individuals sampled twice). The stationary measurements were positioned at the casting/mold making site (n = 10), core making (n = 4), sand preparation (n = 3), melting (n = 3), shake out (n = 1), fettling (n = 2), and feedstock area (n = 1)
  2. GM Geometric mean, GSD Geometric standard deviation, AM Arithmetic mean, SD Arithmetic standard deviation, resp. adj. Respirator adjusted exposure values