PMID- 34494438 OWN - NLM STAT- MEDLINE DCOM- 20210923 LR - 20210923 IS - 1520-5118 (Electronic) IS - 0021-8561 (Linking) VI - 69 IP - 37 DP - 2021 Sep 22 TI - Enhanced Bio-Barcode Immunoassay Using Droplet Digital PCR for Multiplex Detection of Organophosphate Pesticides. PG - 11131-11141 LID - 10.1021/acs.jafc.1c03216 [doi] AB - A bio-barcode immunoassay based on droplet digital polymerase chain reaction (ddPCR) was developed to simultaneously quantify triazophos, parathion, and chlorpyrifos in apple, cucumber, cabbage, and pear. Three gold nanoparticle (AuNP) probes and magnetic nanoparticle (MNP) probes were prepared, binding through their antibodies with the three pesticides in the same tube. Three groups of primers, probes, templates, and three antibodies were designed to ensure the specificity of the method. Under the optimal conditions, the detection limits (expressed as IC(10)) of triazophos, parathion, and chlorpyrifos were 0.22, 0.45, and 4.49 ng mL(-1), respectively. The linear ranges were 0.01-20, 0.1-100, and 0.1-500 ng mL(-1), and the correlation coefficients (R(2)) were 0.9661, 0.9834, and 0.9612, respectively. The recoveries and relative standard deviations (RSDs) were in the ranges of 75.5-98.9 and 8.3-16.7%. This study provides the first insights into the ddPCR for the determination of organophosphate pesticides. It also laid the foundation for high-throughput detection of other small molecules. FAU - Cui, Xueyan AU - Cui X AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Abd El-Aty, A M AU - Abd El-Aty AM AD - State Key Laboratory of Biobased Material and Green Papermaking, College of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Science, Jinan 250353, P. R. China. AD - Department of Pharmacology, Faculty of Veterinary Medicine, Cairo University, 12211 Giza, Egypt. AD - Department of Medical Pharmacology, Medical Faculty, Ataturk University, Erzurum 25240, Turkey. FAU - Zhang, Chan AU - Zhang C AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Xu, Lingyuan AU - Xu L AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Liu, Haijin AU - Liu H AD - Inspection and Testing Center of Agricultural and Livestock Products of Tibet, Lhasa 850000, P. R. China. FAU - Jia, Huiyan AU - Jia H AD - Ningbo Academy of Agricultural Sciences, Ningbo 315040, Zhengjiang, P. R. China. FAU - Wang, Yuanshang AU - Wang Y AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Cao, Zhen AU - Cao Z AUID- ORCID: 0000-0003-1259-6107 AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Salvador, J-Pablo AU - Salvador JP AUID- ORCID: 0000-0002-3608-0634 AD - Nanobiotechnology for Diagnostics Group, Instituto de Quimica Avanzada de Cataluna, IQAC-CSIC, C/ Jordi Girona, 18-26, 08034 Barcelona, Spain. AD - CIBER de Bioingenieria, Biomateriales y Nanomedicina (CIBER-BBN), Avenida Monforte de Lemos, 3-5, Pavillion 11, Floor 0, 28029 Madrid, Spain. FAU - She, Yongxin AU - She Y AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Jin, Fen AU - Jin F AUID- ORCID: 0000-0002-8686-7582 AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Wang, Jing AU - Wang J AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Jin, Maojun AU - Jin M AUID- ORCID: 0000-0002-9102-8572 AD - Institute of Quality Standard and Testing Technology for Agro-Products, Chinese Academy of Agricultural Science, Beijing 100081, P. R. China. FAU - Hammock, Bruce D AU - Hammock BD AUID- ORCID: 0000-0003-1408-8317 AD - Department of Entomology & Nematology and the UC Davis Comprehensive Cancer Center, University of California, Davis, Davis, California 95616, United States. LA - eng PT - Journal Article DEP - 20210908 PL - United States TA - J Agric Food Chem JT - Journal of agricultural and food chemistry JID - 0374755 RN - 0 (Pesticides) RN - 7440-57-5 (Gold) SB - IM MH - Gold MH - Immunoassay MH - Limit of Detection MH - *Metal Nanoparticles MH - *Pesticides/analysis MH - Polymerase Chain Reaction OTO - NOTNLM OT - ddPCR OT - gold nanoparticles OT - magnetic nanoparticles OT - oligonucleotides OT - organophosphate pesticides EDAT- 2021/09/09 06:00 MHDA- 2021/09/24 06:00 CRDT- 2021/09/08 08:38 PHST- 2021/09/09 06:00 [pubmed] PHST- 2021/09/24 06:00 [medline] PHST- 2021/09/08 08:38 [entrez] AID - 10.1021/acs.jafc.1c03216 [doi] PST - ppublish SO - J Agric Food Chem. 2021 Sep 22;69(37):11131-11141. doi: 10.1021/acs.jafc.1c03216. Epub 2021 Sep 8.