title: Application of suspension array for simultaneous detection of four different mycotoxins in corn and peanut.
abstract: Mycotoxins are highly toxic contaminants in foodstuffs and feedstuffs. The study presents a novel suspension array technology for quantifying four mycotoxins, namely, aflatoxin B1, deoxynivalenol, T-2 toxin, and zearalenone, in corn and peanut. Using 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide hydrochloride, the complete antigens of the mycotoxins became attached to the microspheres with viable activity. The optimal concentrations of each antibody and biotin-rabbit anti-goat IgG were obtained through chessboard titration. The four mycotoxins were detected simultaneously and quantitatively in corn and peanut using indirect competitive immunoassay. Multi-channel standard curves with appropriate logistic correlation (R(2)>0.9819) were respectively plotted. The broad working ranges with three to four orders of magnitude were calculated, and limits of detection at the pg level were found to be better than those obtained using high-performance liquid chromatography. The recovery rates in the actual samples generally ranged from 80.16% to 117.65%, with an intra-assay coefficient of variation lower than 15%, which indicated high accuracy and repeatability. A suspension array method for the simultaneous detection of the four mycotoxins within 4h was successfully developed using minimal samples; the method was proven to have high throughput, flexibility, accuracy and reproducibility. The approach could detect multiple contaminants in actual samples.
authors.affiliation: Tianjin Key Laboratory of Risk Assessment and Control Technology for Environment and Food Safety, Institute of Health and Environmental Medicine, Tianjin 300050, PR China.
authors.forename: Ying
authors.initials: Y
authors.lastname: Wang
authors.forename: Baoan
authors.initials: B
authors.lastname: Ning
authors.forename: Yuan
authors.initials: Y
authors.lastname: Peng
authors.forename: Jialei
authors.initials: J
authors.lastname: Bai
authors.forename: Ming
authors.initials: M
authors.lastname: Liu
authors.forename: Xianjun
authors.initials: X
authors.lastname: Fan
authors.forename: Zhiyong
authors.initials: Z
authors.lastname: Sun
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Lv
authors.forename: Caihong
authors.initials: C
authors.lastname: Zhou
authors.forename: Zhixian
authors.initials: Z
authors.lastname: Gao
mesh_terms: D010367:Arachis / Q000737:chemistry*; D015374:Biosensing Techniques / Q000295:instrumentation; D045424:Complex Mixtures / Q000032:analysis; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005504:Food Analysis / Q000295:instrumentation*; D005506:Food Contamination / Q000032:analysis*; D007118:Immunoassay / Q000295:instrumentation*; D046228:Microarray Analysis / Q000295:instrumentation*; D009183:Mycotoxins / Q000032:analysis*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D003313:Zea mays / Q000737:chemistry*
chemical_list: D045424:Complex Mixtures; D009183:Mycotoxins