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Hu M, Hu X, Wang G, Cheng Y, Yu X, Huang X, Li Y. A fluorescent lateral flow immunoassay based on CdSe/CdS/ZnS quantum dots for sensitive detection of olaquindox in feedstuff. Food Chem 2023; 419:136025. [PMID: 37030205 DOI: 10.1016/j.foodchem.2023.136025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2022] [Revised: 03/15/2023] [Accepted: 03/21/2023] [Indexed: 04/07/2023]
Abstract
A portable fluorescence immunosensor based on the CdSe/CdS/ZnS quantum dots (QDs) with multiple-shell structure was fabricated for the precise quantification of olaquindox (OLA). The QDs labeled anti-OLA antibody used as bioprobe played an important role in the design and preparation of a lateral flow test strip. Due to the strong fluorescent intensity of QDs, the sensitivity is greatly improved. The quantitative results were obtained using a fluorescent strip scan reader within 8 min, and the calculated limit of detection for OLA at 0.12 µg/kg, which was 2.7 times more sensitive than that of the conventional colloidal gold-based strips method. Acceptable recovery of 85.0%-95.5% was obtained by the spiked samples. This newly established QDs-based strip immunoassay method is suitable for the on-site detection and rapid initial screening of OLA in swine feedstuff, and is potentially applied for the detection of other veterinary drugs to ensure food safety.
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Li L, Zhang M, Li R, Jiang H, Liu Z. Facile synthesis of highly luminescent rod-like terbium-based metal-organic frameworks for sensitive detection of olaquindox. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2021; 13:3785-3791. [PMID: 34350907 DOI: 10.1039/d1ay00824b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Olaquindox (OLA), a chemically synthesized antibacterial growth promoter, despite being strictly controlled, is illegally used in feed to improve feed conversion efficiency and increase the rate of weight gain for animals. However, it has become clear that OLA has toxic effects on human beings via the transmission of OLA through the food chain. Here, by employing terbium nitrate to provide metal ions and benzene-1,3,5-tricarboxylic acid (H3BTC) as an organic ligand, a simple, rapid, and easy scale-up synthetic method was presented for the fabrication of water-stable and highly luminescent rod-like metal-organic frameworks (Tb-BTC MOFs). Using the Tb-BTC MOFs as a luminescent probe, the luminescence quenching effect was obviously observed upon the addition of OLA, ascribed to the binding of OLA molecules on the surface of Tb-BTC and the existence of an inner-filter effect (IFE) mechanism. The correlation between the luminescence quenching ΔI and the concentration of OLA was found to be linear from 1.0 to 1000.0 μM with a detection limit of 20.6 nM. Furthermore, a Tb-BTC-loaded fiber paper was prepared and it is highly responsive (30 s) and suitable for visual OLA assay. The method described here can be successfully applied to the detection of OLA in animal feed and edible animal tissue samples.
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Affiliation(s)
- Ling Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
| | - Miaomiao Zhang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
| | - Ran Li
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
| | - Huan Jiang
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
| | - Zhongde Liu
- Key Laboratory of Luminescent and Real-Time Analytical Chemistry (Southwest University), Ministry of Education, College of Pharmaceutical Sciences, Southwest University, Chongqing 400716, China.
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Park JM, Koh JH, Kim JM. Development of Pretreatment Method for Analysis of Vitamin B 12 in Cereal Infant Formula using Immunoaffinity Chromatography and High-Performance Liquid Chromatography. Food Sci Anim Resour 2021; 41:335-342. [PMID: 33987553 PMCID: PMC8115006 DOI: 10.5851/kosfa.2020.e92] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/05/2020] [Accepted: 11/16/2020] [Indexed: 11/17/2022] Open
Abstract
Vitamin B12 deficiency may lead to serious health issues in both
infants and adults. A simple analytical method involving sample pretreatment
with enzyme, followed by cyanide addition under acidic conditions; separation on
an immunoaffinity column; and high-performance liquid chromatography (HPLC) was
developed for the rapid detection and quantitation of vitamin B12 in
powdered milk. Detection limit and powdered milk recovery were determined by
quantitative analysis. The limits of detection and quantitation were 2.71 and
8.21 μg/L, respectively. Relative standard deviations of the intra-day
and inter-day precisions varied in the ranges of
0.98%–5.31% and 2.16%–3.90%,
respectively. Recovery of the analysis varied in the range of
83.41%–106.57%, suggesting that the values were acceptable.
Additionally, vitamin B12 content and recovery in SRM 1849a were
54.10 μg/kg and 112.24%, respectively. Our results suggested that
the analytical method, including the sample pretreatment step, was valid. This
analytical method can be implemented in many laboratory-scale experiments that
seek to save time and labor. Therefore, this study shows that
immunoaffinity–HPLC/ultraviolet is an acceptable technique for
constructing a reliable database on vitamin B12 in powdered milk
containing starch as well as protein and/or fat in high amounts.
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Affiliation(s)
- Jung Min Park
- Department of Food Marketing and Safety, Konkuk University, Seoul 05029, Korea
| | - Jong Ho Koh
- Department of Bio-Food Analysis, Bio-Campus, Korea Polytechnic College, Nonsan 32940, Korea
| | - Jin Man Kim
- Department of Food Marketing and Safety, Konkuk University, Seoul 05029, Korea
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Guo L, Wu X, Cui G, Song S, Kuang H, Xu C. Colloidal Gold Immunochromatographic Assay for Rapid Detection of Carbadox and Cyadox in Chicken Breast. ACS OMEGA 2020; 5:1422-1429. [PMID: 32010814 PMCID: PMC6990421 DOI: 10.1021/acsomega.9b02931] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 10/11/2019] [Indexed: 05/21/2023]
Abstract
Abused or misused carbadox (CBX) and cyadox (CYA) in animal feed may cause food safety concerns, threatening human health. Here, we describe the design of a novel hapten for preparation of a monoclonal antibody against CBX and CYA simultaneously. Using this antibody, colloidal gold immunochromatographic assay (GICA) was developed for screening of CBX and CYA residues in chicken breast. Under optimal conditions, semiquantitative analysis results were visible by eye, with a visual limit of detection of 8 μg/kg for CBX and CYA, and cut-off values of 20 μg/kg for CBX and 40 μg/kg for CYA in chicken breast. Quantitative analysis could be performed using a hand-held strip scanner, with a calculated limit of detection of 2.92 μg/kg for CBX and 2.68 μg/kg for CYA in chicken breast. Validated by liquid chromatography-MS/MS, the developed GICA provides a useful tool for rapid on-site CBX and CYA residue screening in chicken breast.
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Affiliation(s)
- Lingling Guo
- State
Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- School
of Food Science and Technology, Collaborative Innovation Center of
Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
| | - Xiaoling Wu
- State
Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- School
of Food Science and Technology, Collaborative Innovation Center of
Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- E-mail: (X.W.)
| | - Gang Cui
- YanCheng
Teachers University, Yancheng 224100, People’s Republic
of China
| | - Shanshan Song
- State
Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- School
of Food Science and Technology, Collaborative Innovation Center of
Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
| | - Hua Kuang
- State
Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- School
of Food Science and Technology, Collaborative Innovation Center of
Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
| | - Chuanlai Xu
- State
Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- School
of Food Science and Technology, Collaborative Innovation Center of
Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi, Jiangsu 214122, People’s Republic of China
- E-mail: (C.X.)
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