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. Author manuscript; available in PMC: 2010 Mar 15.
Published in final edited form as: J Air Waste Manag Assoc. 2010 Feb;60(2):204–209. doi: 10.3155/1047-3289.60.2.204

Table 3.

Results of regression analysis for relationship between concentrations measured with passive diffusion tubes, CM, and true contaminant concentrations, CT; see Eq. (3).

Concentrations are in ppm and exposure time, T, in hours. Coefficients listed are ± values for 95% confidence intervals. All coefficients are significant at the 95% confidence level (p < 0.05).

Contaminant A B C R2
CO −0.87 ± 0.43 0.88 ± 0.05 0.0066 ± 0.0049 0.96
H2S −0.022 ± 0.066 0.95 ± 0.17 0.0005 ± 0.0004 0.73
NO2 0.036 ± 0.016 0.37 ± 0.057 −0.0002 ± 0.0001 0.90
SO2 0.055 ± 0.022 0.80 ± 0.058 −0.0004 ± 0.0001 0.95
benzene −0.44 ± 0.43 1.08 ± 0.24 −0.0021 ± 0.0018 0.61