A micro-discharge photoionization detector for micro-gas chromatography

Autor:	Shree Narayanan, Gary W. Rice, Masoud Agah
Rok vydání:	2013
Předmět:	Photoionization detector Electron capture detector Pulsed discharge ionization detector Chemistry law Thermal conductivity detector Helium ionization detector Analytical chemistry Flame ionization detector Gas detector Discharge ionization detector Analytical Chemistry law.invention
Zdroj:	Microchimica Acta. 181:493-499
ISSN:	1436-5073 0026-3672
DOI:	10.1007/s00604-013-1146-9
Popis:	We report on a small (20 × 10 mm) micromachined device for the detection of gases in micro-gas chromatography (GC). It incorporates a micro-discharge across a 20-μm gap, and a remote electrode in the micro cavity that generates an electrical signal corresponding to the photo-ionization of gaseous analytes in a stream of carrier gas. Multi-component mixtures were detected and the results compared to those obtained with a flame ionization detector. The minimum detectable limit is 350 pg.μL−1 of n-octane in air when applying a 1.4 mW discharge. The combination of wet etching of glass (as used for microfluidic channels) with a lift-off process for detector electrodes by a robust batch process results in a universal, non-destructive, and sensitive microdetector for micro-GC.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::b4c4497c2cf3a400425ac0e3ee6b5932 https://doi.org/10.1007/s00604-013-1146-9 Zobrazit plný text záznamu Full text from SpringerLink