TY - JOUR

T1 - Reversed-phase chromatomembrane extraction as a novel approach for automated sample pretreatment

T2 - Anions determination in biodiesel by ion chromatography with conductivity detection

AU - Shishov, Andrey

AU - Stolarova, Elena

AU - Moskvin, Leonid

AU - Bulatov, Andrey

PY - 2019/12/9

Y1 - 2019/12/9

N2 - In this study, a reversed-phase chromatomembrane extraction (RP-CME) method as a novel approach for automated sample pretreatment was suggested for the first time. The RP-CME was applied to automated separation of anions (formate, chloride, nitrate, phosphate and sulfate) from biodiesel samples as a proof-of-concept example. The novel design of chromatomembrane cell was developed for on-line RP-CME. The RP-CME procedure assumed mass-transfer of water-soluble analytes from organic sample phase (biodiesel sample) to aqueous phase supported in a porous composite mass-transfer block. The composite mass-transfer block based on microporous hydrophobic poly (tetrafluoroethylene) and hydrophilic glass fiber was developed for the RP-CME implementation. The block provided the effective retention of aqueous phase into the cell and simultaneous penetration of organic phase. The hydrophilic membrane-based sheet was used for the on-line separation of hydrophilic emulsion (biodiesel in water) containing target analytes obtained during analytes elution by aqueous phase from the mass-transfer block. The RP-CME was successfully coupled with an ion chromatography with conductivity detection. The limits of detection, calculated from a blank test based on 3σ, were 5 μg kg−1 for sulfate, 6 μg kg−1 for nitrate, 3 μg kg−1 for chloride, 5 μg kg−1 for phosphate and 1 μg kg−1 for formate.

AB - In this study, a reversed-phase chromatomembrane extraction (RP-CME) method as a novel approach for automated sample pretreatment was suggested for the first time. The RP-CME was applied to automated separation of anions (formate, chloride, nitrate, phosphate and sulfate) from biodiesel samples as a proof-of-concept example. The novel design of chromatomembrane cell was developed for on-line RP-CME. The RP-CME procedure assumed mass-transfer of water-soluble analytes from organic sample phase (biodiesel sample) to aqueous phase supported in a porous composite mass-transfer block. The composite mass-transfer block based on microporous hydrophobic poly (tetrafluoroethylene) and hydrophilic glass fiber was developed for the RP-CME implementation. The block provided the effective retention of aqueous phase into the cell and simultaneous penetration of organic phase. The hydrophilic membrane-based sheet was used for the on-line separation of hydrophilic emulsion (biodiesel in water) containing target analytes obtained during analytes elution by aqueous phase from the mass-transfer block. The RP-CME was successfully coupled with an ion chromatography with conductivity detection. The limits of detection, calculated from a blank test based on 3σ, were 5 μg kg−1 for sulfate, 6 μg kg−1 for nitrate, 3 μg kg−1 for chloride, 5 μg kg−1 for phosphate and 1 μg kg−1 for formate.

KW - Anions

KW - Automated sample pretreatment

KW - Biodiesel

KW - Chromatomembrane cell

KW - Ion chromatography with conductivity detection

KW - Reversed-phase chromatomembrane extraction

KW - ONLINE COLLECTION/CONCENTRATION

KW - TRACE AMOUNTS

KW - METHANOL

KW - GLYCEROL

KW - DIOXIDE

KW - AIR

KW - FLOW

KW - CHEMISTRY

KW - SEPARATION

KW - CELL

UR - http://www.scopus.com/inward/record.url?scp=85071247228&partnerID=8YFLogxK

UR - http://www.mendeley.com/research/reversedphase-chromatomembrane-extraction-novel-approach-automated-sample-pretreatment-anions-determ

U2 - 10.1016/j.aca.2019.08.031

DO - 10.1016/j.aca.2019.08.031

M3 - Article

AN - SCOPUS:85071247228

VL - 1087

SP - 62

EP - 68

JO - Analytica Chimica Acta

JF - Analytica Chimica Acta

SN - 0003-2670

ER -