TVOC Gas Detector Method Method hom
Cov kev ntsuas ntawm TVOC gas detectors feem ntau suav nrog kev tshawb pom photoionization, electrochemical detection, infrared absorption, optical absorption, thiab roj chromatography. cov
Photoionization nrhiav kom tau txoj kev (PID nrhiav kom tau txoj kev): Txoj kev no siv lub tshuab nqus tsev ultraviolet teeb nrog lub zog ionization tshwj xeeb los tsim lub teeb ultraviolet, uas tso cov roj molecules nkag mus rau hauv chav ionization los ntawm lub lim membrane, ionizing thiab rhuav tshem cov organic molecules hauv cov roj rau hauv qhov zoo. ions thiab tsis zoo them electrons. Nyob rau hauv lub teb hluav taws xob ntawm lub electrode, ions thiab electrons sib tsoo nrog cov electrode phaj, tsim ib tug deterioration tsis muaj zog ion tam sim no. Tom qab tau nthuav dav los ntawm lub siab-rhiab heev microcurrent amplifier, cov teeb liab tam sim no tau sau thiab hloov mus rau hauv cov teeb liab digital rau tso saib raws li qhov ntsuas roj.
Electrochemical detection method: Txoj kev no yog ua raws li lub hauv paus ntsiab lus ntawm cov tshuaj tiv thaiv tshuaj, thiab siv electrodes react TVOC nyob rau hauv cov huab cua nrog reagents, tsim hluav taws xob teeb liab los ntsuas TVOC concentration. Txoj kev no muaj qhov zoo ntawm kev nkag siab zoo, kev teb ceev ceev, thiab kev ua haujlwm yooj yim, tab sis nws yuav tsum tau siv cov tshuaj reagents thiab muaj qee qhov kev ua qias tuaj rau ib puag ncig.
Infrared absorption method: Txoj kev no suav cov TVOC concentration los ntawm kev kuaj xyuas qhov nqus ntawm cov wavelengths tshwj xeeb ntawm lub teeb infrared los ntawm TVOC molecules hauv huab cua. Nws tsis xav tau cov tshuaj reagents, yooj yim rau kev khiav lag luam, thiab muaj cov lus teb ceev ceev, tab sis muaj qee qhov kev txwv ntawm kev ntsuas ntau ntawm TVOC concentration.
Optical absorption method: Txoj kev no suav cov TVOC concentration los ntawm kev txheeb xyuas cov qib ntawm kev tawg ntawm lub teeb tshwj xeeb ntawm lub teeb los ntawm TVOC molecules hauv huab cua. Txoj kev no muaj qhov ntsuas dav dav thiab cov lus teb ceev ceev rau TVOC concentration, tab sis nws yuav tsum tau siv cov khoom siv kho qhov muag thiab muaj qee qhov kev ua qias tuaj ib puag ncig.
Gas chromatography: Txoj kev no cais TVOC hauv huab cua los ntawm cov roj chromatography kem thiab ntsuas qhov concentration ntawm TVOC hauv kem. Txoj kev no muaj cov yam ntxwv ntawm kev ntsuas qhov tseeb thiab cov lus teb ceev ceev, tab sis nws yuav tsum tau siv cov khoom siv xws li roj chromatography txhua kab thiab cov cuab yeej ntes, uas yog kim heev.
