PMID- 29757971 OWN - NLM STAT- MEDLINE DCOM- 20180926 LR - 20181207 IS - 1420-3049 (Electronic) IS - 1420-3049 (Linking) VI - 23 IP - 5 DP - 2018 May 14 TI - Comparison of the Conventional and Electroenhanced Direct-Immersion Solid-Phase Microextraction for Sampling of Nicotine in Biological Fluids of the Human Body. LID - 10.3390/molecules23051171 [doi] LID - 1171 AB - A stainless steel fiber was made porous and adhesive by platinization and then coated by nanostructured polypyrrole (PPy), using an appropriate electrophoretic deposition (EPD) method. The morphological surface structure and functional groups of the PPy-coated fiber were studied using SEM (Scanning electron microscope) instrument. The prepared fiber was used for comparison of direct immersion (DI) and electroenhanced direct immersion solid-phase microextraction (EE-DI-SPME) of nicotine in human plasma and urine samples followed by gas chromatography flame ionization detector (GC-FID) determination. The effects of the influential experimental parameters on the efficiency of the DI-SPME and EE-DI-SPME methods, including the pH and ionic strength of the sample solution, applied Direct current (DC) voltage, extraction temperature and time and stirring rate, were optimized. Under the optimal conditions, the calibration curves for the DI-SPME-GC-FID and EE-DI-SPME-GC-FID methods were linear over the ranges of 0.1(-)10.0 mug mL(-1) and 0.001(-)10.0 mug mL(-1), respectively. The relative standard deviations (RSDs, n = 6) were found to be 6.1% and 4.6% for the DI and EE strategies, respectively. The LODs (limit of detection) of the DI-SPME-GC-FID and EE-DI-SPME-GC-FID methods were found to be 10 and 0.3 ng mL(-1), respectively. The relative recovery values (for the analysis of 1 microg mL(-1) nicotine) were found to be 91(-)110% for EE-DI-SPME and 75(-)105% for DI-SPME. The enrichment factors for DI-SPME and EE-DI-SPME sampling were obtained as 38,734 and 50,597, respectively. The results indicated that EE-SPME was more efficient for quantitation of nicotine in biological fluids. The developed procedure was successfully carried out for the extraction and measurement of nicotine in real plasma and urine samples. FAU - Abdolhosseini, Sana AU - Abdolhosseini S AD - Department of Chemistry, Lorestan University, P.O. Box 465, Khorramabad 44316-68151, Iran. sana_abdolhoseiny@yahoo.com. FAU - Ghiasvand, Ali Reza AU - Ghiasvand AR AUID- ORCID: 0000-0002-4570-7988 AD - Department of Chemistry, Lorestan University, P.O. Box 465, Khorramabad 44316-68151, Iran. alireza.ghiasvand@utas.edu.au. FAU - Heidari, Nahid AU - Heidari N AD - Department of Chemistry, Lorestan University, P.O. Box 465, Khorramabad 44316-68151, Iran. nheidari44@yahoo.com. LA - eng PT - Journal Article DEP - 20180514 PL - Switzerland TA - Molecules JT - Molecules (Basel, Switzerland) JID - 100964009 RN - 0 (Coated Materials, Biocompatible) RN - 0 (Polymers) RN - 0 (Pyrroles) RN - 0 (Solutions) RN - 30604-81-0 (polypyrrole) RN - 6M3C89ZY6R (Nicotine) SB - IM MH - Body Fluids/*chemistry MH - Coated Materials, Biocompatible/chemistry MH - Humans MH - Hydrogen-Ion Concentration MH - Nanostructures/chemistry/ultrastructure MH - Nicotine/*chemistry/*isolation & purification MH - Osmolar Concentration MH - Polymers/chemistry MH - Pyrroles/chemistry MH - Reproducibility of Results MH - *Solid Phase Microextraction/methods MH - Solutions MH - Temperature MH - Time Factors PMC - PMC6099498 OTO - NOTNLM OT - direct-immersion SPME OT - electroenhanced SPME OT - nicotine OT - plasma OT - urine COIS- The authors have no conflict of interest to declare. EDAT- 2018/05/15 06:00 MHDA- 2018/09/27 06:00 PMCR- 2018/05/14 CRDT- 2018/05/15 06:00 PHST- 2018/03/23 00:00 [received] PHST- 2018/04/30 00:00 [revised] PHST- 2018/05/09 00:00 [accepted] PHST- 2018/05/15 06:00 [entrez] PHST- 2018/05/15 06:00 [pubmed] PHST- 2018/09/27 06:00 [medline] PHST- 2018/05/14 00:00 [pmc-release] AID - molecules23051171 [pii] AID - molecules-23-01171 [pii] AID - 10.3390/molecules23051171 [doi] PST - epublish SO - Molecules. 2018 May 14;23(5):1171. doi: 10.3390/molecules23051171.