TY - JOUR

T1 - Sensitivity Increase in Headspace Analysis of Hydrocarbons in Water by Using Online Selective Elimination of Gas Extractant

AU - Rodinkov, Oleg V.

AU - Pisarev, Alexey Y.

AU - Moskvin, Leonid N.

AU - Bugaichenko, Aleksandra S.

AU - Nesterenko, Pavel N.

PY - 2022/1/14

Y1 - 2022/1/14

N2 - In this study, a novel approach in headspace gas chromatographic analysis using the selective absorption of the gas extractant during concentration of the analytes was developed. The carbon dioxide used as the gas extractant was removed from the sample flow by passing it through a column packed with microdispersed sodium hydroxide granules. The analytical capabilities of the suggested method were illustrated by the determination of aliphatic and aromatic hydrocarbons in water. We established that this method allows the preconcentration of analytes in the gas phase to be increased proportionally to the volume ratios of the gas extractant before and after absorption, while the analyte limits of detection decrease 30-fold. For example, benzene can be detected in water at a concentration of 0.5 µg/L.

AB - In this study, a novel approach in headspace gas chromatographic analysis using the selective absorption of the gas extractant during concentration of the analytes was developed. The carbon dioxide used as the gas extractant was removed from the sample flow by passing it through a column packed with microdispersed sodium hydroxide granules. The analytical capabilities of the suggested method were illustrated by the determination of aliphatic and aromatic hydrocarbons in water. We established that this method allows the preconcentration of analytes in the gas phase to be increased proportionally to the volume ratios of the gas extractant before and after absorption, while the analyte limits of detection decrease 30-fold. For example, benzene can be detected in water at a concentration of 0.5 µg/L.

KW - Aliphatic and aromatic hydrocarbons

KW - Carbon dioxide

KW - Gas chromatography

KW - Gas-extractant absorption

KW - Gas-phase extraction

KW - Headspace analysis

KW - carbon dioxide

KW - gas- phase extraction

KW - gas-extractant absorption

KW - DRINKING

KW - SAMPLE PREPARATION

KW - aliphatic and aromatic hydrocarbons

KW - SOLID-PHASE MICROEXTRACTION

KW - gas chromatography

KW - PURGE-AND-TRAP

KW - HYDROGEN

KW - headspace analysis

KW - VOLATILE ORGANIC-COMPOUNDS

UR - http://www.scopus.com/inward/record.url?scp=85123781587&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/b4ea8ea9-b64c-3865-9f92-6f05bf178493/

U2 - 10.3390/separations9010015

DO - 10.3390/separations9010015

M3 - Article

VL - 9

JO - Separations

JF - Separations

SN - 2297-8739

IS - 1

M1 - 15

ER -