Determination of seven tetracyclines in milk by dissolvable layered double hydroxide-based solid-phase extraction coupled with high-performance liquid chromatography. Issue 13 (18th March 2021)

• Record Type: Journal Article
• Authors: Yang, Yi; Zhang, Jing; Li, Yongxin; Yin, Shuo; Jiang, Yang; Sun, Chengjun
• Is Part Of: Analytical methods. Volume 13:Issue 13(2021)
• Page Start: 1618
• Page End: 1624
• Publication Date: 2021-03-18
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/d1ay00154j
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : A dissolvable layered double hydroxide-based solid-phase extraction combined with high-performance liquid chromatography was developed for the analysis of seven tetracyclines in milk samples. Abstract : A dissolvable layered double hydroxide-based solid-phase extraction combined with high-performance liquid chromatography was developed for the analysis of minocycline, oxytetracycline, tetracycline, demeclocycline, metacycline, chlortetracycline and doxycycline in milk samples. In situ formation of the layered double hydroxide was achieved by the addition of MgCl2 –AlCl3 solution to alkaline deproteinized milk. The analytes were efficiently extracted by the Mg/Al layered double hydroxide. After centrifugation, the co-precipitates were dissolved in 0.1 mol L −1 Na2 EDTA–McIlvaine buffer prior to HPLC analysis. Under optimized conditions, the method achieved low detection limits of 0.414–0.986 μg L −1 and quantification limits of 1.38–3.29 μg L −1, and good recoveries of 93.5–100% with intra- and inter-day RSDs of 0.498–4.08% and 1.23–10.0%, respectively. This method is convenient, accurate, sensitive, rapid, cost-effective, eco-friendly, and suitable for the determination of seven tetracycline antibiotics in milk samples.