PMID- 34635223 OWN - NLM STAT- MEDLINE DCOM- 20211013 LR - 20211013 IS - 1873-3573 (Electronic) IS - 0039-9140 (Linking) VI - 236 DP - 2022 Jan 1 TI - Simultaneous preconcentration and determination of sulfonamide antibiotics in milk and yoghurt by dynamic pH junction focusing coupled with capillary electrophoresis. PG - 122833 LID - S0039-9140(21)00754-2 [pii] LID - 10.1016/j.talanta.2021.122833 [doi] AB - A dynamic pH junction was used in capillary electrophoresis (CE-DAD) to on-line preconcentrate, separate, and determine trace amounts of sulfonamide antibiotics (SAs) in milk and yoghurt samples in this study. A sample matrix with 0.15% acetic acid and 10% methanol (MeOH) at a pH of 4.0, and a background electrolyte (BGE) that contained 35 mM sodium citrate with 10% MeOH at a pH of 8.5, and an acidic barrage of 0.4% acetic acid with 10% MeOH at a pH of 2.5 were utilised to achieve a stacking effect for SAs through a dynamic pH junction. Under optimised conditions, the proposed preconcentration method showed good linearity (30-500 ng/mL, r(2) >/= 0.9940), low limits of detection (LODs) of 4.1-6.3 ng/mL, and acceptable analytes recovery (81.2-106.9%) with relative standard deviations (RSDs) within 5.3-13.7 (n = 9). The limits of quantification (LOQs) were below the maximum residue limit approved by the European Union (EU) in this type of matrices. Sensitivity enhancement factors of up to 129 were reached with the optimised dynamic pH junction using CE with a diode array detector (DAD). The method was used to determine SAs in fresh milk, low-fat milk, full-cream milk, and yoghurt samples. CI - Copyright (c) 2021 Elsevier B.V. All rights reserved. FAU - Semail, Nadhiratul-Farihin AU - Semail NF AD - Integrative Medicine Clusters, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam, 13200, Kepala Batas, Penang, Malaysia. FAU - Abdul Keyon, Aemi Syazwani AU - Abdul Keyon AS AD - Department of Chemistry, Faculty of Science and Centre for Sustainable Nanomaterials, Ibnu Sina Institute for Scientific and Industrial Research, Universiti Teknologi Malaysia, 81310, UTM, Johor Bahru, Johor, Malaysia. FAU - Saad, Bahruddin AU - Saad B AD - Fundamental & Applied Sciences Department, Universiti Teknologi PETRONAS, 32601, Seri Iskandar, Perak Darul Ridzuan, Malaysia. FAU - Kamaruzaman, Sazlinda AU - Kamaruzaman S AD - Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43400, UPM Serdang, Selangor Darul Ehsan, Malaysia. FAU - Mohamad Zain, Nur Nadhirah AU - Mohamad Zain NN AD - Integrative Medicine Clusters, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam, 13200, Kepala Batas, Penang, Malaysia. FAU - Lim, Vuanghao AU - Lim V AD - Integrative Medicine Clusters, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam, 13200, Kepala Batas, Penang, Malaysia. FAU - Miskam, Mazidatulakmam AU - Miskam M AD - School of Chemical Sciences, Universiti Sains Malaysia, 11800, USM Pulau Pinang, Malaysia. FAU - Wan Abdullah, Wan Nazwanie AU - Wan Abdullah WN AD - School of Chemical Sciences, Universiti Sains Malaysia, 11800, USM Pulau Pinang, Malaysia. FAU - Yahaya, Noorfatimah AU - Yahaya N AD - Integrative Medicine Clusters, Advanced Medical and Dental Institute (AMDI), Universiti Sains Malaysia, Bertam, 13200, Kepala Batas, Penang, Malaysia. Electronic address: noorfatimah@usm.my. FAU - Chen, David D Y AU - Chen DDY AD - Department of Chemistry, University of British Columbia, Vancouver, V6T 1Z1, Canada. Electronic address: chen@chem.ubc.ca. LA - eng PT - Journal Article DEP - 20210831 PL - Netherlands TA - Talanta JT - Talanta JID - 2984816R RN - 0 (Anti-Bacterial Agents) RN - 0 (Sulfonamides) SB - IM MH - Animals MH - *Anti-Bacterial Agents MH - Electrophoresis, Capillary MH - Hydrogen-Ion Concentration MH - Milk MH - Sulfonamides MH - *Yogurt OTO - NOTNLM OT - Capillary electrophoresis OT - Dynamic pH junction OT - Milk OT - Online preconcentration OT - Sulfonamide antibiotics OT - Yoghurt EDAT- 2021/10/13 06:00 MHDA- 2021/10/14 06:00 CRDT- 2021/10/12 05:42 PHST- 2021/07/07 00:00 [received] PHST- 2021/08/27 00:00 [revised] PHST- 2021/08/28 00:00 [accepted] PHST- 2021/10/12 05:42 [entrez] PHST- 2021/10/13 06:00 [pubmed] PHST- 2021/10/14 06:00 [medline] AID - S0039-9140(21)00754-2 [pii] AID - 10.1016/j.talanta.2021.122833 [doi] PST - ppublish SO - Talanta. 2022 Jan 1;236:122833. doi: 10.1016/j.talanta.2021.122833. Epub 2021 Aug 31.