Method for measuring greenhouse gases using infrared absorption spectrometer

A method for measuring greenhouse gases using an infrared absorption spectrometer, comprising the steps of:

• when data is analyzed based on an absorption waveform for a gas obtained by an infrared absorption spectrometry, measuring components on priority basis, among components in the gas, having peaks that do not overlap peaks of the other components;
• successively subtracting the peaks of the components from the absorption waveform;
• (a) subtracting peaks of NO and SO2F2 from the absorption waveform of the gas to measure NO and SO2F2;
• (b) subtracting a peak of COF2 from the absorption waveform obtained in the step (a) to measure COF2;
• (c) subtracting a peak of SOF2 from the absorption waveform obtained in the step (b) to measure SOF2;
• (d) subtracting a peak of OF2 from the absorption waveform obtained in the step (c) to measure OF2;
• (e) subtracting peaks of SF6, NP3 and C4F8 from the absorption waveform obtained in the step (d) to measure SF6, NP3 and C4F8, respectively;
• (f) subtracting peaks of C3F8 and SiF4 from the absorption waveform obtained in the step (e) to measure C3F8 and SiF4, respectively;
• (g) subtracting peaks of N2O, C2F6 and C2F4 from the absorption waveform obtained in the step (f) to measure N2O, C2F6 and C2F4, respectively;
• (h) subtracting peaks of CF4, SO2 and CO from the absorption waveform of the gas obtained in the step (g) to measure CF4, SO2 and CO, respectively;
• (i) measuring CHF3 from the absorption waveform obtained in the steps (a)˜(h);
• and
• (j) subtracting peaks of HF, CO2 and NO2 from any of the absorption waveform of the gas and the absorption waveforms of the gas obtained in the steps (a)˜(i).

A method for measuring greenhouse gases using an infrared absorption spectrometer comprising:

• conducting infrared absorption spectrometry for a gas;
• using one or more of components in the gas as correction gases;
• and
• setting a plurality of values for concentrations of the correction gases to be used for correction at equal intervals in logarithmic values of the concentrations.

A method for measuring greenhouse gases using an infrared absorption spectrometer comprising:

• conducting infrared absorption spectrometry for a gas;
• using one or more of components in the gas as correction gases;
• when CF4 or SF6 is selected as the correction gas, making a calibration curve representing absorption areas for concentrations with respect to a main peak region regarding the correction gas;
• and
• performing correction at portion having excellent linearity in the calibration curve with respect to the main peak region.