A rapid and simple method for the synthesis of boron acid modified expanded graphite (B-EG) with the assist of microwave irradiation was developed. The synthesis process can be completed in one-step, where HSO and HBO were used as intercalating agent and KMnO was used as oxidizing agent. The obtained B-EG was worm-like and lamellar structure with plenty of small dispersed particles. The B-EG was successfully used as solid phase extraction absorbent for the enrichment and separation of chloramphenicol in egg samples, followed by liquid chromatography tandem mass spectrometry analysis. The predominant conditions affecting extraction efficiency were optimized. Under optimal conditions, the detection limit of the method was 0.27 ng g. The relative standard deviations of within-day and between-day were in the range of 2-6% and 2-8%, respectively. The method was successfully used to detect chloramphenicol in five egg samples. At the spiked concentration of 50 ng g, the satisfactory recoveries (87-94%) were obtained.
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http://dx.doi.org/10.1016/j.chroma.2018.06.032 | DOI Listing |
Microb Pathog
November 2024
College of Life Sciences, Sichuan University, Chengdu, PR China; Key Laboratory of Bio-Resource and Eco-Environment of Ministry of Education, Chengdu, PR China; Animal Disease Prevention and Food Safety Key Laboratory of Sichuan Province, Chengdu, PR China. Electronic address:
Sci Rep
September 2024
Paul G. Allen School for Global Health, Washington State University, 240 SE Ott Road, Pullman, WA, 99164-7090, USA.
Large-scale poultry production in low- and middle-income countries may be a source of adulterated products (e.g., Salmonella contamination, antibiotic residues) that can be disseminated over wide areas.
View Article and Find Full Text PDFActa Vet Hung
September 2024
Department of Food Hygiene and Technology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, 34320 Avcilar, Istanbul, Türkiye.
ESBL-producing Escherichia coli strains threaten public health and obligate the use of last-resort antibiotics. This study identified 15 E. coli isolates through 16S rRNA and gyrB genes, specific to E.
View Article and Find Full Text PDFVet Med Sci
July 2024
Department of pathophysiology, College of Veterinary Medicine and Animal Sciences, University of Gondar, Gondar, Ethiopia.
Background: Salmonellosis is one of the most common food-borne diseases in industrialised and developing countries. In recent year, an increase in antimicrobial resistance among different Salmonella serotypes has been observed.
Objective: A cross-sectional study was conducted to assess the prevalence and antimicrobial susceptibility of Salmonella isolated from local chicken eggs in four selected towns in Ethiopia.
Int J Biol Macromol
June 2024
College of Food Science, Guangdong Provincial Key Laboratory of Food Quality and Safety, South China Agricultural University, Guangzhou 510642, China. Electronic address:
Florfenicol (FF), with its broad-spectrum antibacterial activity, is frequently abused in the livestock and poultry industries and has aroused the growing public concern. Owing to structural similarities and varying maximum residue limits between florfenicol and other chloramphenicol (CAP)-type antibiotics, including thiamphenicol (TAP) and chloramphenicol (CAP), there is an urgent need for a rapid and effective immunoassay method to distinguish them, in order to minimize the risk of false positives. Fortunately, a highly specific monoclonal antibody (mAb), named as SF11, has been developed using hybridoma technology.
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