建立了一种超高效液相色谱-串联质谱法测定牛奶和奶粉中二氰二胺(DCD)、三聚氰胺(MEL)和三聚氰酸(CY)的分析方法.样品用5%(质量分数)三氯乙酸水溶液提取,无需净化和浓缩,用Acquity UPLC HSS T3色谱柱(50mm×2.1 mm,1.8 μm)分离,以乙腈和乙酸铵作为流动相进行梯度洗脱,电喷雾正、负离子(ESI±)模式同时电离,多反应监测模式进行检测.结果表明:在5.0 ~ 200.0μg/L范围内线性关系良好(r≥0.995).牛奶中3种化合物在0.02、0.10、0.20 mg/kg的添加回收率为60.0% ~ 105.8%,相对标准偏差(RSD,n=6)为4.2% ~ 13.6%;奶粉中3种化合物在0.05、0.10、0.20 mg/kg的添加回收率为78.0%~115.0%,RSD(n=6)为2.7% ~7.5%.牛奶中方法的定量限(信噪比为10)为0.02 mg/kg,奶粉中方法的定量限为0.05 mg/kg.该方法简单、快速、灵敏、准确,适合于牛奶、奶粉等乳及乳制品中DCD、MEL和CY的快速、高灵敏的分析检测.
参考文献
[1] | Ministry for Primary Industries (MPI).For Letter of Assurance.(2013-01-27).http:// www.mpi.govt.nz/Portals/0/Documents/news-resources/news/letter-of-assurance.pdf |
[2] | MPI.For Chinese Translation of Letter of Assurance.(2013-01-27).http://www.mpi.govt.nz/Portals/0/Documents/news-resources/news/chinese-translation-letter-assurance.pdf |
[3] | ChinaNews.(2013-01-25).http://finance.chinanews.com/cj/2013/01-25/4521748.shtml |
[4] | MPI.For Chinese Translation of Frequently Asked Questions.(2013-01-26).http://www.mpi.govt.nz/Portals/0/Documents/ news-resources/ news/ chinese-translation-faq.pdf |
[5] | MPI.New Zealand Government Assures Safety of Country' s Dairy Products.(2013-01-26).http://www.mpi.govt.nz/news-resources/news/new-zealand-government-assures-safety |
[6] | Moret S,Prevarin A,Tubaro F.Food Chemistry,2011,126:1232 |
[7] | Routon B J,Kocher B B,Goodpaster J V.J Forensic Sci,2011,56(1):194 |
[8] | MacMahon S,Begley T H,Diachenko G W,et al.J Chromatogr A,2012,1220:101 |
[9] | Wang Z X,Jiang J,Sun L,et al.Journal of Instrumental Analysis(王祖翔,蒋俊,孙莉,等.分析测试学报),2012,31 (5):593 |
[10] | Li F G,Yao W Q,Su M,et al.Chinese Journal of Chromatography(李锋格,姚伟琴,苏敏,等.色谱),2009,27(2):233 |
[11] | Yun H,Zhang Z H,Gao Y Y,et al.Chinese Journal of Chromatography(云环,张朝晖,高洋洋,等.色谱),2010,28(11):1026 |
[12] | Gui Q W,Liu H,Zhao Z Y,et al.Chinese Journal of Chromatography(桂茜雯,柳菡,赵增运,等.色谱),2010,28(9):859 |
[13] | Zhao S Z,Deng X J,Yi X H,et al.Chinese Journal of Chromatography(赵善贞,邓晓军,伊雄海,等.色谱),2012,30(7):677 |
[14] | FDA.LIB No.4421.[2013-02-05].http://www.fda.gov/Food/ScienceResearch/LaboratoryMethods/DrugChemicalResiduesMethodology/ucm071637.htm |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%