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. Author manuscript; available in PMC: 2016 Nov 21.
Published in final edited form as: Res Rep Health Eff Inst. 2012 Dec;(172):5–82.

Table 9.

Correlationsa of VOC Data with EC and PM2.5 Data

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Compound EC PM2.5 EC PM2.5 EC PM2.5
Trimethylpentane 0.53b 0.56b 0.41b 0.21 0.52b 0.37b
Dimethylpentane 0.57b 0.43b 0.60b 0.04 0.54b 0.32b
2-Methylhexane 0.54b 0.40b 0.56b 0.06 0.60b 0.35b
Methylpentane 0.59b 0.46b 0.47 0.19 0.56b 0.32b
3-Methylhexane 0.57b 0.45b 0.56b 0.04 0.59b 0.35b
Methylcyclohexane 0.54b 0.50b 0.61b 0.19 0.63b 0.44b
Hexane 0.23 0.52b 0.34 0.35 0.71b 0.24b
1,3-Butadiene 0.34b 0.44b 0.66b 0.24 0.39b 0.53b
Benzene 0.57b 0.63b 0.67b 0.34 0.59b 0.35b
Ethylbenzene 0.33b 0.39b −0.13 −0.33 0.61b 0.39b
m&p-Xylenes 0.40b 0.38b −0.13 −0.33 0.60b 0.37b
o-Xylene 0.42b 0.40b −0.13 −0.33 0.62b 0.40b
Styrene 0.53b 0.21 0.51b 0.30 0.61b 0.49b
Toluene 0.09 0.32b 0.55b 0.22b 0.61b 0.39b
MTBE −0.13 0.51b 0.44 0.06 0.39b 0.53b
Acetone 0.40b 0.38b 0.80b 0.18 0.28b 0.40b
Acetaldehyde 0.12 0.70b 0.18 0.57b 0.24b 0.27b
Formaldehyde 0.24b 0.51b 0.91b 0.47 0.28b 0.26b
a

Nonparametric Spearman correlation coefficients.

b

Significant at the 5% level.