Figure 1
From: Can modern infrared analyzers replace gas chromatography to measure anesthetic vapor concentrations?
Linear regression plots comparing IR with GC analysis of isoflurane (A), sevoflurane (B), and desflurane (C) in O2 over a range of concentrations. Closed circles = individual data points; thick black line = line of unity; thin grey line = linear regression (see text for formulas), thick grey lines = upper and lower accuracy limits according to company. The performance of the four modules conformed to that specified by the company, +/- (0.15% + 5% of IR reading).