PMID- 21847972 OWN - NLM STAT- MEDLINE DCOM- 20120802 LR - 20190923 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 29 IP - 5 DP - 2011 May TI - [Determination of bisphenol A in milk by liquid chromatography-tandem mass spectrometry coupled with solid phase extraction of monodisperse magnetic submicron particles as adsorbent]. PG - 399-403 AB - Monodisperse magnetic submicron particles were synthesized by a solvothermal reduction method. A solid phase extraction (SPE) based on the monodisperse magnetic submicron particles and high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) method for the determination of bisphenol A (BPA) at trace level in milk has been established. The important parameters that affect the extraction efficiency such as the solution pH, dosage of magnetic submicron particles, nature of elution solution and its volume were optimized. The optimal extraction conditions were as follows: the pH 6.0, the dosage of 3.5 mg magnetic submicron particles and 0.4 mL methanol as elution solution. BPA was analyzed by HPLC-MS/MS in negative ion mode using an Agilent XDB C18 column as analytical column. Under the optimal conditions, the calibration curves showed a good linearity in the BPA concentration range of 1.0-100.0 micro g/L. The correlation coefficient was 0. 999 3. The average recoveries of BPA at three spiked levels ranged from 85.3% to 96. 1% with the relative standard deviations (RSDs) less than 10%. The detection limit of the method was 1.0 microg/L. The method is sensitive, simple, and suitable for the rapid determination of BPA in milk. FAU - Wu, Xinhua AU - Wu X AD - Faculty of Food Science & Engineering, Central South University of Forestry & Technology, Changsha 410004, China. FAU - Ding, Li AU - Ding L FAU - Xiao, Jiayong AU - Xiao J FAU - Long, Yanjiao AU - Long Y FAU - Xu, Zhou AU - Xu Z FAU - Li, Zhonghai AU - Li Z FAU - Wang, Libing AU - Wang L LA - chi PT - English Abstract PT - Journal Article PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Benzhydryl Compounds) RN - 0 (Phenols) RN - MLT3645I99 (bisphenol A) RN - XM0M87F357 (Ferrosoferric Oxide) SB - IM MH - Animals MH - Benzhydryl Compounds MH - Chromatography, Liquid/*methods MH - Ferrosoferric Oxide/chemistry MH - Food Contamination/*analysis MH - Milk/*chemistry MH - Particle Size MH - Phenols/*analysis MH - Solid Phase Extraction/methods MH - Tandem Mass Spectrometry/*methods EDAT- 2011/08/19 06:00 MHDA- 2012/08/03 06:00 CRDT- 2011/08/19 06:00 PHST- 2011/08/19 06:00 [entrez] PHST- 2011/08/19 06:00 [pubmed] PHST- 2012/08/03 06:00 [medline] AID - 10.3724/sp.j.1123.2011.00399 [doi] PST - ppublish SO - Se Pu. 2011 May;29(5):399-403. doi: 10.3724/sp.j.1123.2011.00399.