MEASUREMENT FOR CONCENTRATION OF ETHYLENEGLYCOL

PURPOSE:To measure the concentration of ethyleneglycol in a conduit handily and quickly, by oxidizing ethyleneglycol in a gas for color reaction of the resulting aldehyde to measure the concentration thereof depending on the length of the colored layer thereof. CONSTITUTION:A measuring apparatus is so arranged to oxidize ethyleneglycol to form formaldehyde. For example, it is made up of a reaction tube 1 holding an oxidizing agent 2 comprising sodium periodate, an assay tube 4 holding a detection agent 5 comprising hydroxylaminephosphate, for instance, which detects and causes a color reaction of formaldehyde, a connection tube 7 and a gas sampler. Then, the reaction tube 1 is connected to an errect tube 10 of a conduit 9 through a connection tube 11. A sample gas is oxidized with the reaction tube 1 to form formaldehyde which is colored with the assay tube 4. Thus, the length of the resulting colored layer is measured to facilitate the measurement of the concentration of ethyleneglycol.