Salt assisted liquid-liquid extraction combined with dispersive liquid-liquid microextraction for the determination of 24 regulated polycyclic aromatic hydrocarbons in human serum.
J Pharm Biomed Anal
; 248: 116319, 2024 Sep 15.
Article
in En
| MEDLINE
| ID: mdl-38908235
ABSTRACT
Polycyclic aromatic hydrocarbons (PAHs) are persistent organic pollutants of great concern due to their carcinogenicity and mutagenicity. Their determination in human serum, particularly in at-risk populations, is necessary but difficult because they are distributed over a wide range of polarity and are present at trace level. A new method combining salting-out assisted liquid-liquid extraction (SALLE) and dispersive liquid-liquid microextraction with solidification of floating organic drop (DLLME-SFO) adapted to a reduced volume of sample (100⯵l) was developed to determine 24 PAHs in human serum. Some key parameters of DLLME-SFO (volume of extraction solvent, ratio of extraction/dispersive solvent volumes, and salt addition) were first studied by applying it to spiked pure water. For its application to serum, a sample treatment step involving SALLE was optimized in terms of nature and content of salts and applied upstream of DLLME-SFO. It was applied to the extraction of 24 regulated PAHs from spiked serum followed by an analysis by liquid chromatography coupled with UV and fluorescence detection. The extraction recoveries ranged from 48.2 and 116.0â¯% (relative standard deviations 2.0-14.6â¯%, n=5-9), leading to limits of quantification of PAHs in human serum from 0.04 to 1.03⯵g/L using fluorescence detection and from 10 to 40⯵g/L using UV detection. This final method combining SALLE and DLLME-SFO showed numerous advantages such as no evaporation step, high efficiency and low solvent-consumption and will be useful for monitoring PAHs in low volumes of serum.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Polycyclic Aromatic Hydrocarbons
/
Solvents
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Liquid-Liquid Extraction
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Liquid Phase Microextraction
Limits:
Humans
Language:
En
Journal:
J Pharm Biomed Anal
Year:
2024
Document type:
Article