... toluene, xylene, TVOC,NMTHC)2. Natgas, Artificial Gas, Coal-Mine Gas, LPG, Mixed Gas, High Purity Gas (Ar,He,O2,N2,CO2)3. Food ... the column box, power data protection.6. GC9310 gas chromatograph with self-test function, when error occus it will be automatically ... close the temperature controller.7. GC9310 gas chromatograph have been ...