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BioMed Research International
Volume 2017 (2017), Article ID 8649314, 7 pages
https://doi.org/10.1155/2017/8649314
Research Article

Determination of Aflatoxin M1 and Chloramphenicol in Milk Based on Background Fluorescence Quenching Immunochromatographic Assay

1College of Pharmacy, Xinjiang Medical University, Urumqi 830000, China
2Shanghai Simp Bio-Science Co., Ltd., Shanghai 201800, China
3Center for Disease Control and Prevention, Xinjiang Uyghur Autonomous Region, Urumqi 830000, China

Correspondence should be addressed to Xinxia Li; moc.361@8666xxl and Yuwen Wang; moc.361@6691wygnaw

Received 15 October 2016; Revised 1 February 2017; Accepted 6 February 2017; Published 6 March 2017

Academic Editor: Yu-Chang Tyan

Copyright © 2017 Xiaoxia Wu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Harsh demanding has been exposed on the concentration of aflatoxin M1 (AFM1) and chloramphenicol (CAP) in milk. In this study, we developed a new method based on background fluorescence quenching immunochromatographic assay (bFQICA) to detect AFM1 and CAP in milk. The detection limit for AFM1 was 0.0009 ng/mL, while that for the CAP was 0.0008 ng/mL. The assay variability was determined with 3 AFM1 standards (i.e., 0.25 ng/mL, 0.5 ng/mL, and 1.0 ng/mL), and the actual detection value was 0.2497, 0.5329, and 1.0941, respectively. For the assay variability of 3 CAP standards (i.e., 0.10 ng/mL, 0.30 ng/mL, and 0.50 ng/mL), the actual detection value was 0.0996, 0.3096, and 0.4905, respectively. The recovery rate of AFM1 was 99.7%–101.7%, while that for CAP was 95.3%–97.6%. For the test stability, AFM1 and CAP showed satisfactory test stability even at month 5. Compared with the sensitivity of liquid chromatography-mass spectrometry (LC-MS) method, no statistical difference was noticed in results of the bFQICA. Our method is convenient for the detection of AFM1 and CAP in milk with a test duration of about 8 minutes. Additionally, an internal WiFi facility is provided in the system allowing for quick connection and storage in the intelligent cell phone.