| abstract |
Provided is a quantitative analysis method capable of measuring formaldehyde and the like in a gas sample with sufficient sensitivity and accuracy without requiring pretreatment. In an analysis method in which formaldehyde separated by gas chromatography is converted to methane and detected by a flame ionization detector, concentration calibration is performed using a diluted gas of carbon monoxide or carbon dioxide as a standard gas. did. By this method, trace amounts of formaldehyde, etc. in gas can be analyzed with high sensitivity without any pretreatment, and it is possible to calibrate the concentration accurately with a stable standard gas containing a cylinder. Also, the method of the present invention can be applied. [Selection] Figure 1 |