Continuous measurement of automotive exhaust methanol by means of high resolution mass spectrometry

Abstract

In order to grasp the emission characteristics of automotive exhaust gas, high sensitivity and continuously measuring method is required. In this investigation, a continuous measuring technique for determining methanol in automotive exhaust gas with high resolution mass spectrometer was developed. Methanol in the automotive exhaust gas was measured every 1 second by a high resolution mass spectrometry at m/z=32.026. The exhaust gas was directly introduced to injected mass spectrometer. Detection limit of methanol with this method was 0.1 ppm (S/N=2), and 100% response time was 2 s.