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HAV detection from milk-based products containing soft fruits: Comparison between four different extraction methods.
International Journal of Food Microbiology ( IF 5.0 ) Pub Date : 2020-05-15 , DOI: 10.1016/j.ijfoodmicro.2020.108661
Roberta Battistini 1 , Irene Rossini 1 , Valeria Listorti 1 , Carlo Ercolini 1 , Cristiana Maurella 1 , Laura Serracca 1
Affiliation  

Virus detection in food requires appropriate elution and concentration techniques which need to be adapted for different food matrices. ISO/TS-15216-1:2017 and ISO/TS-15216-2:2019 describe standard methods for hepatitis A virus (HAV) research in some food only. Milk-based products containing one or more types of fruit are not covered by ISO procedures, even though they can be contaminated by fruit added to these products or by the food handlers. The aim of this work was to identify an efficient method for the detection of HAV in milk-based products. Four methods were tested to recover HAV from artificially contaminated milk, yoghurt and ice cream containing soft fruits. Results showed that the efficiency of the tested methods depends on the analyzed matrix. In milk we obtained a mean recovery from 13.4% to 1.9%; method based on high speed centrifuge gave the best values. The average recovery in yoghurt was between 3.3% and 114.4%, the latter value achieved by method with beef extract at 3% as eluent. Finally, two methods gave the best results in ice cream with similar recoveries: 29.1% and 27.7% respectively. The first method used glycine as eluent while the other one was based on high speed centrifugation. The ISO method has never proved to be the most efficient in the matrices studied. Therefore, based on the results obtained, a complete rethinking of the ISO method may be necessary to improve its recovery for some products such as milk, while only small changes would be sufficient for other products, such as yoghurt and ice cream.



中文翻译:

从含有软果的牛奶制品中检测HAV:四种不同提取方法之间的比较。

食品中的病毒检测需要适当的洗脱和浓缩技术,这些技术需要适应不同的食品基质。ISO / TS-15216-1:2017和ISO / TS-15216-2:2019仅描述了在某些食品中进行甲型肝炎病毒(HAV)研究的标准方法。包含一种或多种水果的乳基产品不受ISO程序的限制,即使添加到这些产品中的水果或食品处理人员可能将其污染。这项工作的目的是确定一种检测乳制品中HAV的有效方法。测试了四种方法以从人工污染的牛奶,酸奶和含软果的冰淇淋中回收HAV。结果表明,所测试方法的效率取决于所分析的矩阵。在牛奶中,我们的平均回收率从13.4%提高到1.9%;基于高速离心机的方法给出了最佳值。酸奶的平均回收率在3.3%至114.4%之间,后者的值通过使用3%的牛肉提取物作为洗脱剂的方法获得。最后,两种方法在冰激凌中的回收率最高,分别达到29.1%和27.7%。第一种方法使用甘氨酸作为洗脱液,而另一种方法则基于高速离心。在所研究的矩阵中,从未证明ISO方法是最有效的。因此,根据获得的结果,可能需要对ISO方法进行彻底的重新思考,以提高某些产品(如牛奶)的回收率,而对于其他产品(如酸奶和冰淇淋)而言,只需进行很小的改动就足够了。后者的值通过使用3%的牛肉提取物作为洗脱液的方法获得。最后,两种方法在冰激凌中的回收率最高,分别达到29.1%和27.7%。第一种方法使用甘氨酸作为洗脱液,而另一种方法则基于高速离心。在所研究的矩阵中,从未证明ISO方法是最有效的。因此,根据获得的结果,可能需要对ISO方法进行彻底的重新思考,以提高某些产品(如牛奶)的回收率,而对于其他产品(如酸奶和冰淇淋)而言,只需进行很小的改动就足够了。后者的值通过使用3%的牛肉提取物作为洗脱液的方法获得。最后,两种方法在冰激凌中的回收率最高,分别达到29.1%和27.7%。第一种方法使用甘氨酸作为洗脱液,而另一种方法则基于高速离心。在所研究的矩阵中,从未证明ISO方法是最有效的。因此,根据获得的结果,可能需要对ISO方法进行彻底的重新思考,以提高某些产品(如牛奶)的回收率,而对于其他产品(如酸奶和冰淇淋)而言,只需进行很小的改动就足够了。在所研究的矩阵中,从未证明ISO方法是最有效的。因此,根据获得的结果,可能需要对ISO方法进行彻底的重新思考,以提高某些产品(如牛奶)的回收率,而对于其他产品(如酸奶和冰淇淋)而言,只需进行很小的改动就足够了。在所研究的矩阵中,从未证明ISO方法是最有效的。因此,根据获得的结果,可能需要对ISO方法进行彻底的重新思考,以提高某些产品(如牛奶)的回收率,而对于其他产品(如酸奶和冰淇淋)而言,只需进行很小的改动就足够了。

更新日期:2020-05-15
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