摘要
建立了一种快速、简单、准确的牛奶蛋白改性纤维鉴定方法。使用ESI(Electron Spray Ionization)/TOF(Time of Flight)质谱对牛奶蛋白改性纤维胰蛋白酶解肽进行分析,确定了牛奶蛋白改性纤维特征肽段,使用该特征肽段制备得到特异性单克隆抗体;将酪蛋白包被于T线,建立了针对牛奶蛋白改性纤维的免疫层析快速鉴定方法。该方法以7M尿素为提取剂,检出限为氨基酸质量分数为1.00%的牛奶蛋白改性纤维(相当于混纺4.00%牛奶蛋白改性纤维的纱线),检测时间不超过20 min(含前处理)。该方法无需使用分析仪器,对常见的纤维没有非特异性识别,纤维的染色不会对检测结果造成干扰。
A rapid, simple and accurate identification method for modified milk protein fibers was developed. The digested modified milk protein fiber was characterized by ESI(electron spray ionization)/TOF(time of flight) mass spectrometry and a characteristic peptide hapten was designed. Then the hapten was used to prepare special monoclonal antibody. The immunochromatographic identification method for modified milk protein fibers was developed by wrapping the casein on T line. The limit of detection(LOD) of the method was 1.00% mass fraction of amino acid of modified milk protein fiber(corresponding to the yarn blending with 4.00% modified milk protein fiber) with 7 M urea as an extraction solution. The total test time was less than 20 min. The method didn't need any analytical equipment and would not disturbe the fiber dyeing.
引文
[1]阮超明.牛奶蛋白改性纤维腈纤维结构及其性能研究[D].上海:东华大学,2008.
[2]韩高锋,廖艳芝,姚伟民.混纺产品中牛奶蛋白改性纤维腈纤维和腈纶鉴别方法的研究[J].中国纤检,2015(13):70-71.
[3]赵俊凤.牛奶蛋白改性纤维腈混纺纱及其产品研究[D].上海:上海工程技术大学,2011.
[4]吴佩云.大豆蛋白纤维和牛奶蛋白纤维的鉴别方法[J].上海纺织科技,2009,37(12):49-52.
[5]GUO L,XU L,SONG S,et al.Development of an immunochromatographic strip for the rapid detection of maduramicin in chicken and egg samples[J].Food&Agricultural Immunology,2018,29(1):458-469.
[6]LEE M J,KIM H J.Development of an immunoaffinity chromatography and LC-MS/MS method for the determination of 6 zearalenones in animal feed[J].PLo S One,2018,13(3):e0193584.
[7]ZHANG W,HE X,LIU P,et al.Rapid determination of ractopamine in porcine urine by a fluorescence immunochromatography assay[J].Analytical Letters,2016,49(14):2165-2176.
[8]SAI J,ZHAO Y,SHAN W,et al.Development of an enzyme-linked immunosorbent assay and immunoaffinity column chromatography for saikosaponin d using an antisaikosaponin d monoclonal antibody[J].Planta Med.,2016,82(5):432-439.
[9]ZHOU Y,LI Y S,PAN F G,et al.Identification of tetrodotoxin antigens and a monoclonal antibody[J].Food Chemistry,2009,112(3):582-586.
[10]WANG J P,ZHANG S X,SHEN J Z.Technical note:A monoclonal antibody-based immunoassay for determination of ractopamine in swine feeds[J].Journal of Animal Science,2006,84(5):1248-1251.
[11]SHYU R H,SHYU H F,LIU H W,et al.Colloidal gold-based immunochromatographic assay for detection of ricin[J].Toxicon,2002,40(3):255-258.
[12]罗晓菊,刘伟,沈加加.牛奶蛋白改性聚丙烯腈针织物的染色性能研究[J].针织工业,2014(6):45-48.
[13]宋娟,王榕妹,王悦秋,等.半抗原的设计、修饰及人工抗原的制备[J].分析化学,2010,38(8):1211-1218.
[14]ZHANGS,LAI X,YANG G.Enzyme-linked Fab'fragment based competitive immunoassay for ovalbumin in hot-processed food[J].Journal of Immunoassay Immunochemistry 2013,34(4):393-403.
[15]ZHANGS,WANG S,HUANG J,et al.High-specificity quantification method for almond-by-products,based on differential proteomic analysis[J].Food Chemistry,2016,194:522-528.