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Dostęp zamkniętyAmperometric detector for gas chromatography based on a silica sol-gel solid electrolyte
| dc.abstract.en | An electrochemical cell comprising a silica sol-gel solid electrolyte, a working electrode that protrudes into a gas phase, and reference and counter electrodes that contact the solid electrolyte comprises an amperometric detector for gas chromatography. Under potentiostatic conditions, a current related to the concentration of an analyte in the gas phase is produced by its oxidation at the three-phase boundary among the sol-gel, working electrode, and the gas phase. The sol-gel is processed to contain an electrolyte that also serves as a humidistat to maintain a constant water activity even in the presence the gas chromatographic mobile phase. Response was demonstrated toward a diverse set of analytes, namely hydrogen, 1,2-ethandithiol, phenol, p-cresol, and thioanisole. Using flow injection amperometry of hydrogen with He as the carrier gas, 90% of the steady-state current was achieved in < 1 s at a flow rate of 20 mL min−1. A separation of 1,2-ethandithiol, phenol, p-cresol, and thioanisole at a 2.2 mL min−1 flow rate was achieved with respective detection limits (k = 3 criterion) of 4, 1, 3, and 70 ppmv when the working electrode potential was 800 mV. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Steinecker, William H. |
| dc.contributor.author | Miecznikowski, Krzysztof |
| dc.contributor.author | Cox, James A. |
| dc.contributor.author | Sandlin, Zechariah D. |
| dc.contributor.author | Kulesza, Paweł |
| dc.date.accessioned | 2024-01-24T16:28:49Z |
| dc.date.available | 2024-01-24T16:28:49Z |
| dc.date.issued | 2017 |
| dc.description.finance | Nie dotyczy |
| dc.description.volume | 174 |
| dc.identifier.doi | 10.1016/J.TALANTA.2017.05.074 |
| dc.identifier.issn | 0039-9140 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/100553 |
| dc.language | eng |
| dc.pbn.affiliation | chemical sciences |
| dc.relation.ispartof | Talanta |
| dc.relation.pages | 1-6 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | Amperometric detector |
| dc.subject.en | Gas phase |
| dc.subject.en | Constant applied potential |
| dc.subject.en | Silica sol-gel electrolyte |
| dc.title | Amperometric detector for gas chromatography based on a silica sol-gel solid electrolyte |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |