| A new disperser–less, centrifuge–less, ice–bath less and deep eutectic solvent–based solidification of organic
droplets dispersive liquid–liquid microextraction performed in a laboratory–made extraction apparatus coupled
with gas chromatography–mass spectrometry has been developed for the analysis of ten pesticides in plasma and
urine samples. For this purpose, a glass tube containing a glass membrane filter was fabricated and a new
synthesized deep eutectic solvent with density lighter than water was used as an extractant. The extraction
solvent was forced to pass through the glass filter under N2 stream and it was dispersed as the fine droplets in the
sample solution. In this step, the analytes were transferred into the droplets. Due to low density of the extractant,
it was collected on top of the sample solution without centrifugation. After performing the validation of the
method, low limits of detection in the ranges of 2–17 and 4–36 ng L−1 in urine and plasma were obtained,
respectively. Extraction recoveries were in the range of 79–97%. Enrichment factors were obtained from 379 to
485 in urine and 158–194 in plasma. Finally, plasma and urine samples of farmers were effectively analyzed
using the method. |