CLC number: Q81
On-line Access: 2019-01-22
Received: 2018-02-25
Revision Accepted: 2018-05-17
Crosschecked: 2018-12-05
Cited: 0
Clicked: 3695
Pattarachaya Preechakasedkit, Nattaya Ngamrojanavanich, Nanthika Khongchareonporn, Orawon Chailapakul. Novel ractopamine–protein carrier conjugation and its application to the lateral flow strip test for ractopamine detection in animal feed[J]. Journal of Zhejiang University Science B,in press.Frontiers of Information Technology & Electronic Engineering,in press.https://doi.org/10.1631/jzus.B1800112 @article{title="Novel ractopamine–protein carrier conjugation and its application to the lateral flow strip test for ractopamine detection in animal feed", %0 Journal Article TY - JOUR
一种新型莱克多巴胺-蛋白质载体结合技术在侧向流试纸条检测动物饲料中莱克多巴胺含量中的应用创新点:基于曼尼希反应的克莱多巴胺-牛血清蛋白(RAC-BSA)结合方法,具有一步性、简单、快速,且所需试剂少的优点. 方法:通过曼尼希反应产生RAC-BSA结合物,制备竞争型侧向流试纸条.将RAC标记于猪饲料中,以体积比10:90的甲醇:电泳缓冲液作为提取缓冲液,在25 min内完成样品制备.通过裸眼观察定性评估RAC-BSA结合物的免疫应答以及检测灵敏性,通过智能手机和电脑软件(ImageJ)进行半定量分析. 结论:在最佳条件下,侧向流试纸条检测的检出限(LOD)在5 min裸眼评估下为1 ng/g;半定量分析中,其线性范围为0.075~0.750 ng/g,计算的LOD为0.10 ng/g,定量限为0.33 ng/g,且相关性较好(R2=0.992).回收率为96.4%~103.7%,同实验内及不同实验间的相对标准偏差为2.5%~3.6%.通过与酶联免疫吸附法对比,该侧向流试纸条检测结果具有较高的准确性和特异性.因此,通过曼尼希反应制备RAC-BSA结合物是一步的简单的结合法,可用于侧向流试纸条检测法. 关键词组: Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article
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[41]List of electronic supplementary materials [42]Fig. S1 Results of MALDI-TOF-MS analysis [43]Fig. S2 Lateral flow strip test for RAC detection using the RAC–BSA(1) prepared via the Mannich reaction and the RAC–BSA(2) prepared using previous method for the immobilization on test line [44]Fig. S3 TEM image of AuNPs [45]Fig. S4 UV-vis spectra of AuNPs and monoclonal antibody against RAC–AuNPs conjugated [46]Fig. S5 Cross reactivity test by loading running buffer, RAC, SAL, CLB, TER, NE, and PHE [47]Fig. S6 Storage stability after keeping the strip tests for 0 to 5 months after loading running buffer as negative control and 1 ng/mL of RAC as positive control [48]Fig. S7 Effect of the volume ratio of methanol and running buffer of 0:100, 5:95, 10:90, 20:80, and 40:60 toward the lateral flow strip test [49]Fig. S8 Relationship between the ∆gray intensity and the concentrations of the non-spiked (0) and spiked RAC in animal feed at 0.075–1.000 ng/g Journal of Zhejiang University-SCIENCE, 38 Zheda Road, Hangzhou
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