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. 2019 Mar 14;19(6):1296. doi: 10.3390/s19061296

Table 2.

Fitting curve parameters for the tested acetone concentrations under different carrier gases.

Acetone Concentration (ppm)
3.5 10.5 17.6 35
Carrier Gas Nitrogen Air Nitrogen Air Nitrogen Air Air
Fit Parameter
y0 −2.517 × 10−4 −0.00262 0.00625 −0.00856 −0.00507 −0.00109 −0.00447
A1 0.808 0.808 0.950 0.950 0.925 0.925 0.246
t1 0.247 0.247 0.384 0.384 0.394 0.394 2.26
A2 0.189 0.189 0.103 0.103 0.102 0.102 0.802
t2 2.29 2.29 2.72 2.72 3.11 3.11 0.355
Adj. R2 0.886 0.974 0.993 0.972 0.995 0.988 0.997