{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T00:56:23Z","timestamp":1790643383965,"version":"4.1.0"},"reference-count":49,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2018,11,10]],"date-time":"2018-11-10T00:00:00Z","timestamp":1541808000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"CAMS Innovation Fund for Medical Sciences (CIFMS)","award":["No. 2016-I2M-1-001"],"award-info":[{"award-number":["No. 2016-I2M-1-001"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>A novel, precise, and accurate high-performance liquid chromatography-tandem mass spectrometry (Q-trap-MS) method was developed, optimized, and validated for determination of vancomycin in human serum using norvancomycin as an internal standard. Effect of different parameters on the analysis was evaluated. ZORBAX SB-C18 column (150 \u00d7 4.6 mm, 5 \u03bcm) using water (containing 0.1% formic acid, v\/v)\u2013acetonitrile (containing 0.1% formic acid, v\/v) as a mobile phase was chosen. The calibration curve was linear over the concentration ranges of 1 to 2000 ng\/mL for vancomycin. The limit of detection (LOD) and limit of quantification (LOQ) for vancomycin were 0.3 and 1.0 ng\/mL. Recoveries were between 87.2 and 102.3%, which gave satisfactory precision. A total of 100 serum samples (from 50 patients with diabetic foot proven Gram-positive infection and 50 nondiabetic patients with pneumonia requiring hospitalization and antibiotic therapy) were analyzed by this method. The trough vancomycin concentrations of diabetic foot infection (DFI) patients and nondiabetic patients were 8.20 \u00b1 2.83 \u03bcg\/mL (range: 4.80\u201314.2 \u03bcg\/mL) and 15.80 \u00b1 5.43 \u03bcg\/mL (range: 8.60\u201319.5 \u03bcg\/mL), respectively. The method is sensitive, precise, and reproducible, it could be applied for routine laboratory analysis of vancomycin in serum samples.<\/jats:p>","DOI":"10.3390\/molecules23112939","type":"journal-article","created":{"date-parts":[[2018,11,14]],"date-time":"2018-11-14T02:42:41Z","timestamp":1542163361000},"page":"2939","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":34,"title":["A Novel Method for the Determination of Vancomycin in Serum by High-Performance Liquid Chromatography-Tandem Mass Spectrometry and Its Application in Patients with Diabetic Foot Infections"],"prefix":"10.3390","volume":"23","author":[{"given":"Min","family":"Liu","sequence":"first","affiliation":[{"name":"Department of Pharmacy, National Cancer Center\/National Clinical Research Center for Cancer\/Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhi-Hui","family":"Yang","sequence":"additional","affiliation":[{"name":"Institute of Aviation Medicine of Air Force, Beijing 100142, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Guo-Hui","family":"Li","sequence":"additional","affiliation":[{"name":"Department of Pharmacy, National Cancer Center\/National Clinical Research Center for Cancer\/Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2018,11,10]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"2819","DOI":"10.1128\/JCM.00551-07","article-title":"Bacteriology of moderate-to-severe diabetic foot infections and in vitro activity of antimicrobial agents","volume":"45","author":"Citron","year":"2007","journal-title":"J. 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