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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: Atmos Environ (1994). 2010 Nov 1;44(36):4545–4552. doi: 10.1016/j.atmosenv.2010.08.024

Table 3.

Seasonal variation of median PAH to Abs or PM2.5 ratio, stratified by location.

Ratio Indoor Outdoor
Heating (n=201) Nonheating (n=97) Heating (n=67) Nonheating (n=31)
Σ8PAHnonvolatile/Abs 1.867 0.975** 2.239 0.853**
Σ8PAHsemivolatile/Abs 39.64 59.06** 12.34 28.53**
BaP/Abs 0.167 0.072** 0.142 0.055**
Σ8PAHnonvolatile/PM2.5 0.118 0.062** 0.219 0.074**
Σ8PAHsemivolatile/PM2.5 2.523 3.804** 1.126 2.469**
BaP/PM2.5 0.010 0.004** 0.013 0.004**
Abs/PM2.5 0.066 0.063 0.090 0.076**

Mann-Whitney test performed;

*

p<0.05,

**

p<0.001