... Gas, Coal-Mine Gas, LPG, Mixed Gas, High Purity Gas (Ar,He,O2,N2,CO2)Food ... Additives & Pesticide Residue (organophosphorus, organochlorine, amino acid methyl ester )Alcohol & Liquor (methanol, ethanol, ethyl acetate, ethyl butyrate, acetaldehyde)Dissolved Gas ... of nitrogen, hydrogen,air & Gas purifierPacked columnsCapillary columnsChromatograph workstationSeptumLiner InsertSyringeConversion ...