2024 info:eu-repo/date/embargoEnd/2026-10-01 application/pdf 4730448 bytes info:eu-repo/semantics/article This paper presents the method for monitoring 7 PCB congeners (PCB 28, 52, 101, 118, 138, 153, and 180) from the US EPA priority, which can also be applied for quantification of PCB sums (28+31). The separation of the PCB 28 and PCB 31 was also examined. The GC-MS technique with the HP-5MS column and the accelerated solvent extraction (ASE) were applied. The accuracy and precision of the method were assessed as the recovery (R, %) of the spiked matrices and the relative standard deviation (RSD, %). The obtained recoveries for 17 spiked soil matrices (at the concentration level of 0.05 mg/kg) ranged from 73.8 % to 100.6 % and for spiked sediments from 80.2 % to 106.5 %. The RSD values ranged between 9.7 % and 15 % for soil and from 23 % to 33 % for sediment. The calculation of R and RSD were performed both for individual peaks as well as the sum of PCB (28+31). The recoveries of the certified reference materials (CRM) for soil and sediment were also calculated. The river sediment CRM recovery was in the range from 23.3 % (PCB 28+31) to 60 % (PCB 118) while recovery for soil CRM varied between 51.6 % for PCB (28+31) to 100.6 % for PCB 101. The z-score of the soil and sediment CRMs were in the satisfactory range ±2 for most PCB congeners. It was not possible to separate PCB 28 and PCB 31 for CRM soil. info:eu-repo/semantics/embargoedAccess All rights reserved Microchemical Journal volume: 207 number: 111761 startpage: 1 endpage: 9 https://unilib.phaidrabg.rs/o:5697 doi:10.1016/j.microc.2024.111761 ISSN: 0026-265X PCB 28, PCB 31, soil, sediment, ASE Nenin, Tanja Petković, Anđelka Mitrović, Tatjana Čolić, Jasna Elsevier Ltd., Amsterdam, Netherlands eng Validation of the GCMS method for the determination of polychlorinated biphenyls congeners in soil and sediment samples