PMID- 24731337 OWN - NLM STAT- MEDLINE DCOM- 20151027 LR - 20181202 IS - 1873-7072 (Electronic) IS - 0308-8146 (Linking) VI - 158 DP - 2014 Sep 1 TI - Miniaturized graphene-based pipette tip extraction coupled with liquid chromatography for the determination of sulfonamide residues in bovine milk. PG - 239-44 LID - S0308-8146(14)00274-X [pii] LID - 10.1016/j.foodchem.2014.02.089 [doi] AB - A miniaturized graphene-based pipette tip extraction (M-G-PTE) method coupled with liquid chromatography-ultraviolet detection was developed for rapid screening of sulfadimidine, sulfachloropyridazine, sulfamonomethoxine, and sulfachloropyrazine residues in bovine milk. Because of the large surface area and unique chemical structure of graphene, an M-G-PTE device packed with 3.0mg graphene could handle 2.0mL of milk samples at one time. This M-G-PTE device showed better adsorption performance for sulfonamides (SAs) than those packed with other adsorbents such as C18, HLB, SCX, PCX, and multiwalled carbon nanotubes. Under the optimized conditions, good linearity was obtained in the range of 0.05-6.0 mug g(-1), with a correlation coefficient (r(2)) of ⩾0.9991. The recoveries at three spiking levels ranged from 90.1% to 113.5% with relative standard deviations (RSDs) of ⩽3.9%. The proposed M-G-PTE method was simple, economical, sensitive, and produced less organic pollution. Thus, it could be applied to the rapid screening of SAs in complicated bovine milk samples. CI - Copyright (c) 2014 Elsevier Ltd. All rights reserved. FAU - Yan, Hongyuan AU - Yan H AD - Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education & College of Pharmacy, Hebei University, Baoding 071002, China. Electronic address: yanhy@hbu.edu.cn. FAU - Sun, Ning AU - Sun N AD - Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education & College of Pharmacy, Hebei University, Baoding 071002, China. FAU - Liu, Shijia AU - Liu S AD - Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education & College of Pharmacy, Hebei University, Baoding 071002, China. FAU - Row, Kyung Ho AU - Row KH AD - Department of Chemistry and Chemical Engineering, Inha University, Incheon 402751, Republic of Korea. FAU - Song, Yanxue AU - Song Y AD - Key Laboratory of Medicinal Chemistry and Molecular Diagnosis, Ministry of Education & College of Pharmacy, Hebei University, Baoding 071002, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20140228 PL - England TA - Food Chem JT - Food chemistry JID - 7702639 RN - 0 (Sulfonamides) RN - 7782-42-5 (Graphite) SB - IM MH - Animals MH - Cattle MH - Chromatography, Liquid/*methods MH - Graphite/*chemistry MH - Milk/*chemistry MH - Sulfonamides/analysis/*chemistry OTO - NOTNLM OT - Graphene adsorbent OT - Milk OT - Miniaturized graphene-based pipette tip extraction OT - Sulfonamides EDAT- 2014/04/16 06:00 MHDA- 2015/10/28 06:00 CRDT- 2014/04/16 06:00 PHST- 2013/09/29 00:00 [received] PHST- 2014/02/05 00:00 [revised] PHST- 2014/02/18 00:00 [accepted] PHST- 2014/04/16 06:00 [entrez] PHST- 2014/04/16 06:00 [pubmed] PHST- 2015/10/28 06:00 [medline] AID - S0308-8146(14)00274-X [pii] AID - 10.1016/j.foodchem.2014.02.089 [doi] PST - ppublish SO - Food Chem. 2014 Sep 1;158:239-44. doi: 10.1016/j.foodchem.2014.02.089. Epub 2014 Feb 28.