130 where the gross of volatile organic compound VOC inside breath air sample 101, is detected CO VOC oxidation/combustion 120 by doing in order to form2 and H2 O, one side or the both quantity of these chemical compounds is measured. As for CO2 inside breath air sample 101 and the H2 O molecule, VOC in CO2 and H2 O conversion 120 before being done, 110 where it is removed. As for one VOC molecule because plural carbons and the hydrogen atom is included, CO the quantity of2 which was formed and the H2 O molecule becomes considerably more than as much as the original number of VOC molecules, sensitivity of detection is improved with that.呼吸気サンプル101内の揮発性有機化合物VOCの総量が、CO2及びH2Oを形成するためにVOCを酸化/燃焼120することによって検出され、これらの化合物の一方又は両方の量が測定される130。呼吸気サンプル101内のCO2及びH2O分子は、VOCがCO2及びH2Oに変換120される前に除去される110。一つのVOC分子は複数の炭素及び水素原子を含むため、形成されたCO2及びH2O分子の数は、VOC分子の元の数よりもかなり多くなり、それによって、検出の感度が改善される。
