. 2023 May 29;23(11):5171. doi: 10.3390/s23115171

Table 2.

Summary of standard deviations, in ppm, extracted from the data shown in Figure 6, for each method of H $_{2}$ concentration quantification.

Method	Numerical Curve Integral	LSQF Data Comparison	Gaussian Fitting	Average
Description	Summation over predefined number of bins around peak	Determination of scale factor between test and reference sample spectrum	Least-squares function fitting to retrieve peak amplitude
No O $_{2}$ normalization	0.03	0.06	0.04	0.01
O $_{2}$ area normalization	0.06	0.1	0.03	0.06
O $_{2}$ LSQF data comparison normalization	0.06	0.03	0.08	0.04