TY - JOUR

T1 - Deep eutectic solvent decomposition-based microextraction for chromium determination in aqueous environments by atomic absorption spectrometry with electrothermal atomization

AU - Shishov, Andrey

AU - Terno, Pavel

AU - Bulatov, Andrey

N1 - Publisher Copyright: © The Royal Society of Chemistry.

PY - 2021/8/21

Y1 - 2021/8/21

N2 - A sensitive, rapid, and simple procedure for the determination of traces of chromium species in natural and waste waters after microextraction using a quasi-hydrophobic deep eutectic solvent based on tetrabutylammonium bromide and hexanoic acid was developed for the first time. In the developed procedure, the deep eutectic solvent played the role of a source of dispersive agent, chelating agent, and extraction solvent. During mixing the aqueous phase with the quasi-hydrophobic deep eutectic solvent, dissolution and dissociation of tetrabutylammonium bromide took place. Tetrabutylammonium bromide acted as a dispersive agent for the hexanoic acid emulsion formation and as an agent for the formation of an ion-association complex with Cr(vi) in an aqueous phase followed by its extraction in hexanoic acid. The organic phase containing Cr(vi) complexes was analyzed by atomic absorption spectrometry with electrothermal atomization. The enrichment factor value was 53, the extraction recovery was 89%, and the limit of detection calculated from a blank test, based on 3σ, was 5.0 ng L-1. The values of intra-day RSD and inter-day RSD were 3.9% and 5.0%, respectively. This journal is

AB - A sensitive, rapid, and simple procedure for the determination of traces of chromium species in natural and waste waters after microextraction using a quasi-hydrophobic deep eutectic solvent based on tetrabutylammonium bromide and hexanoic acid was developed for the first time. In the developed procedure, the deep eutectic solvent played the role of a source of dispersive agent, chelating agent, and extraction solvent. During mixing the aqueous phase with the quasi-hydrophobic deep eutectic solvent, dissolution and dissociation of tetrabutylammonium bromide took place. Tetrabutylammonium bromide acted as a dispersive agent for the hexanoic acid emulsion formation and as an agent for the formation of an ion-association complex with Cr(vi) in an aqueous phase followed by its extraction in hexanoic acid. The organic phase containing Cr(vi) complexes was analyzed by atomic absorption spectrometry with electrothermal atomization. The enrichment factor value was 53, the extraction recovery was 89%, and the limit of detection calculated from a blank test, based on 3σ, was 5.0 ng L-1. The values of intra-day RSD and inter-day RSD were 3.9% and 5.0%, respectively. This journal is

KW - Chromium

KW - Limit of Detection

KW - Liquid Phase Microextraction

KW - Solvents

KW - Spectrophotometry, Atomic

KW - PRECONCENTRATION

KW - SELECTIVE EXTRACTION

KW - CLOUD POINT EXTRACTION

KW - CR(VI)

KW - MESOPOROUS SILICA

KW - SEPARATION

KW - SPECIATION ANALYSIS

KW - WATER SAMPLES

KW - CR(III)

KW - SOLID-PHASE EXTRACTION

UR - http://www.scopus.com/inward/record.url?scp=85112847851&partnerID=8YFLogxK

U2 - 10.1039/d1an00924a

DO - 10.1039/d1an00924a

M3 - Article

C2 - 34296719

AN - SCOPUS:85112847851

VL - 146

SP - 5081

EP - 5088

JO - The Analyst

JF - The Analyst

SN - 0003-2654

IS - 16

ER -