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Wang Y, El-Aty AMA, Chen G, Jia H, Cui X, Xu L, Cao Z, She Y, Jin F, Zhang Y, Hacimuftuoglu A, Lamu S, Wang J, Zheng L, Jin M, Hammock BD. A competitive immunoassay for detecting triazophos based on fluorescent catalytic hairpin self-assembly. Mikrochim Acta 2022; 189:114. [PMID: 35190860 PMCID: PMC10111248 DOI: 10.1007/s00604-022-05217-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 02/01/2022] [Indexed: 11/30/2022]
Abstract
A rapid detection method is introduced for residual trace levels of triazophos in water and agricultural products using an immunoassay based on catalytic hairpin self-assembly (CHA). The gold nanoparticle (AuNPs) surface was modified with triazophos antibody and sulfhydryl bio-barcode, and an immune competition reaction system was established between triazophos and its ovalbumin-hapten (OVA-hapten). The bio-barcode served as a catalyst to continuously induce the CHA reaction to achieve the dual signal amplification. The method does not rely on the participation of enzymes, and the addition of fluorescent materials in the last step avoids interfering factors, such as a fluorescence burst. The emitted fluorescence was detected at 489/521 nm excitation/emission wavelengths. The detection range of the developed method was 0.01-50 ng/mL for triazophos, and the limit of detection (LOD) was 0.0048 ng/mL. The developed method correlates well with the results obtained by LC-MS/MS, with satisfactory recovery and sensitivity. In sum, the designed method is reliable and provides a new approach to detect pesticide residues rapidly and quantitatively.
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Affiliation(s)
- Yuanshang Wang
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - A M Abd El-Aty
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, 250353, China.,Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, Giza, 12211, Egypt.,Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Turkey
| | - Ge Chen
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Huiyan Jia
- Ningbo Academy of Agricultural Sciences, Ningbo, 315040, China
| | - Xueyan Cui
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Lingyuan Xu
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Zhen Cao
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yongxin She
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Fen Jin
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Yudan Zhang
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Ahmet Hacimuftuoglu
- Department of Medical Pharmacology, Medical Faculty, Ataturk University, 25240, Erzurum, Turkey
| | - Sangqiong Lamu
- Inspection and Testing Center of Agricultural and Livestock Products of Tibet, Lhasa, 850000, China
| | - Jing Wang
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - LuFei Zheng
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China.,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China
| | - Maojun Jin
- Institute of Quality Standard and Testing Technology for Agro-Products, Key Laboratory of Agro-Product Quality and Safety, Chinese Academy of Agricultural Sciences, Beijing, 100081, China. .,Key Laboratory of Agro-Product Quality and Safety, Ministry of Agriculture, Beijing, 100081, China. .,Department of Entomology & Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA.
| | - Bruce D Hammock
- Department of Entomology & Nematology, UC Davis Comprehensive Cancer Center, University of California, Davis, CA, 95616, USA
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Gu Y, Xu D, Zou K, Zhou T, Zhu G, Yang G, Qu LL. Combined Paper Centrifugal Chromatographic Separation and SERS Detection for Multicomponent Substances. Anal Chem 2021; 93:8693-8697. [PMID: 34137589 DOI: 10.1021/acs.analchem.1c01625] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The separation and chemical analysis of mixtures in an emergency situation represent major challenges, especially in remote or poverty-stricken areas. A novel method was developed for the rapid separation and detection of multiple components via paper centrifugal chromatography, which costs as little as $2.26 US. The method was realized based on the combination of portable paper centrifugal chromatography and surface-enhanced Raman scattering (SERS) detection. This coupled technique was successfully implemented for the separation and qualitative analysis of a rhodamine 6G-crystal violet mixture and a colorless aniline-pyrocatechol-benzidine mixture. A chromatographic mobile phase was collected using absorbent cotton, which was demonstrated to have no effect on the SERS results. The optimized device achieved rapid and effective separation of the colorless aniline-pyrocatechol-benzidine mixture with a high centrifugal force (0.3303π2 N). The newly developed method involving multicomponent paper centrifugal chromatography-SERS detection will be of great value for emergency-related substance separation and analysis in remote and poor areas.
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Affiliation(s)
- Yingqiu Gu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Di Xu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Kun Zou
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Tingrong Zhou
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Gen Zhu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Guohai Yang
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Lu-Lu Qu
- School of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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Guo WJ, Yang XY, Wu Z, Zhang ZL. A colorimetric and electrochemical dual-mode biosensor for thrombin using a magnetic separation technique. J Mater Chem B 2021; 8:3574-3581. [PMID: 31746938 DOI: 10.1039/c9tb02170a] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
In general, protein detection relies primarily on enzyme-linked immunosorbent assays. Here, we constructed a colorimetric and electrochemical dual-mode biosensor for thrombin detection based on the mechanism of aptamer recognition. Magnetic nanobeads (MBs) were used as carriers for separation and enrichment to quickly capture thrombin (TB) in the complex matrix. Also, the combination of MBs and the magnetic electrode array (MEA) effectively avoided the poisoning of the electrode by biological samples. Furthermore, hybridization chain reaction (HCR) was indirectly used to achieve amplification of TB. A large number of horseradish peroxidases (HRPs) were coupled with the amplified long nucleic acid fragments. Based on the color and current response of the substrate TMB catalyzed by HRP, a dual-mode detection system for thrombin was established to ensure the accuracy of the test results. The method had a minimum resolution of 10 nM to the naked eye and an electrochemical detection limit as low as 0.35 nM. In addition, the sensor provided good anti-interference ability in a complex matrix and showed great potential to detect TB in complex samples.
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Affiliation(s)
- Wen-Jing Guo
- Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, P. R. China.
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Nguyen TH, Sedighi A, Krull UJ, Ren CL. Multifunctional Droplet Microfluidic Platform for Rapid Immobilization of Oligonucleotides on Semiconductor Quantum Dots. ACS Sens 2020; 5:746-753. [PMID: 32115948 DOI: 10.1021/acssensors.9b02145] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Quantum dot-DNA oligonucleotide (QD-DNA) conjugates have been used in many fields such as nucleic acid bioassays, intracellular probes, and drug delivery systems. A typical solid-phase method that achieves rapid loading of oligonucleotides on surfaces of QDs involves a two-step reaction and is performed in a batch-based approach. In contrast, droplet microfluidics offers many advantages that are unavailable when using batch processing, providing rapid and dense immobilized DNA oligonucleotides on QDs. The presented droplet microfluidic approach allows high-quality QD-DNA conjugates to be produced using one single device, which is designed to have two droplet generators, one droplet merger, and one mixer. One of the droplet generators coencapsulates QDs and magnetic beads (MBs) into nanoliter-sized droplets for the production of QD-MB conjugates and the other encapsulates oligonucleotides in nanoliter-sized droplets. These two streams of droplets then merge at a one-to-one ratio in a chamber. The merged droplets travel along the mixer, which is a serpentine microchannel with 30 turns, resulting in QD-DNA conjugation structures of high quality. This multifunctional microfluidic device provides advantages such as higher degree of control over the reaction conditions, minimized cross-contamination and impurities, and reduction of reagent consumption while eliminating any need for external vortexing and pipetting. To evaluate the quality of the QD-DNA conjugates, they were used as Forster resonance energy transfer (FRET) probes to quantify oligonucleic targets.
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Affiliation(s)
- Thu H. Nguyen
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo N2L3G1, Ontario Canada
| | - Abootaleb Sedighi
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga L5L1C6, Ontario, Canada
| | - Ulrich J. Krull
- Department of Chemical and Physical Sciences, University of Toronto Mississauga, 3359 Mississauga Road, Mississauga L5L1C6, Ontario, Canada
| | - Carolyn L. Ren
- Department of Mechanical and Mechatronics Engineering, University of Waterloo, 200 University Avenue West, Waterloo N2L3G1, Ontario Canada
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