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Table 2.

Correlation results of orthogonal linear regression (OR) analyses of volatile organic compound (VOC) with methane at EBC sites. DOI: https://doi.org/10.1525/elementa.2019.00036.t2

CompoundSlope of OR (Compound [ppb]/Methane [ppb])PCCP-Value
Ethane 9.12 × 10–2 0.75 0.000 
Propane 4.57 × 10–2 0.54 0.000 
i-Butane 1.22 × 10–2 0.41 0.006 
n-Butane 1.22 × 10–2 0.46 0.002 
i-Pentane 5.68 × 10–3 0.37 0.014 
n-Pentane 5.75 × 10–3 0.37 0.014 
CompoundSlope of OR (Compound [ppb]/Methane [ppb])PCCP-Value
Ethane 9.12 × 10–2 0.75 0.000 
Propane 4.57 × 10–2 0.54 0.000 
i-Butane 1.22 × 10–2 0.41 0.006 
n-Butane 1.22 × 10–2 0.46 0.002 
i-Pentane 5.68 × 10–3 0.37 0.014 
n-Pentane 5.75 × 10–3 0.37 0.014 

Slopes of the orthogonal linear regression (OR) fit, Pearson correlation coefficients (PCCs), and P-values are tabulated for several VOCs. P-values < 0.001 are reported as 0.000.

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