High performance residue analysis: determination of antibacterial agents in foods using liquid chromatography screening and confirmation methods

 



Ádám Tölgyesi, Éva Pálffi, Tímea Horváth, Viktória Lipcsei


In Hungary, food toxicology monitoring and control analyses, their course and the process of preparation of the monitoring plan for the given year are prescribed and determined by FVM decree 10/2002. (I. 23.). The efficiency of monitoring analyses is increased if the focus is placed primarily on screening methods, and independent confirmation methods are used to test objectionable samples. This allows for the distinguishing between negative samples and those containing drug residues using a simpler, faster and cheaper screening type method, and also for higher certainty in the qualitative and quantitative evaluation of positive samples.

 The objective of this paper is to present an analytical concept developed for antibacterial agents, including a multicomponent screening method and independent confirmation measurements for type B1 authorized agents.

 

LXIV./2. 30/06/18

Welcome 2018/2

Wednesday, June 20, 2018

Dear Readers,


Our leading material presents the latest work of Ádám Tölgyesi et al. The authors discuss rapid and convenient screening methods of the residues of various antibacterial products using a high performance liquid chromatography system. The importance of the analysis of residues that have a significant impact on food chain safety is also signified by the unusually large collection of keywords, prepared for the paper.


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Determination of the sensory development directions of beers using the method of penalty analysis

Wednesday, June 20, 2018

Author: Barbara Tompos

 

1.     Summary


In my research, one of the methods of the determination of sensory product development directions is presented, based on the preference for different beers and the sensory characteristics influencing it. Six different beers were tested, four of which are commercially available (Löwenbrau, Staropramen, cold hop Dreher, Soproni), and two of them are made in breweries (lager, cold hop lager). 


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Study of basic taste recognition among the tourism and catering management students of the Budapest Business School

Wednesday, June 20, 2018

Authors: Zsófia Fekete-Frojimovics, Beatrix Lenkovics, Kinga Magyarné Horváth, Tímea Jakuschné Kocsis, Andrea Lugasi

 

1.     Summary

 

The role of sensory analyses in the food industry and in gastronomy has increased significantly in the last decade. The regulation of both quality and certification is of paramount importance in this area as well.

In this paper presenting our series of analyses, we endeavored to find out to what extent tourism and catering management students are able to recognize the four basic tastes (sweet, salty, sour, bitter) when using all of their senses, and whether their abilities are affected by the exclusion of sight and smell.


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Measures for the protection of honey bees and other pollinating species in plant protection

Wednesday, June 20, 2018

Authors: Géza Ripka, Anna Rónai

 

1. Summary


The Hungarian pesticide authorization authority, the Directorate of Plant Protection, Soil Conservation and Agri-environment of the National Food Chain Safety Office (NÉBIH NTAI) strives to ensure with new measures that the risk to bees and other pollinating organisms is minimized during the proper use of pesticides. This article provides an overview of the causes of recent bee deaths and of the authorization changes intended for the protection of pollinators. Bee protection measures serve not only the economic interests of beekeepers, but they 


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The effect of ground poppy seeds with different properties on the rheological properties of white chocolate

Wednesday, June 20, 2018

Authors: Katalin Zay, László Somogyi, Anita Soós

 

1. Summary


In the coarse of our research, white chocolate samples prepared using poppy seeds and poppy seed flour of different grain size and in different amounts were compared in order to be able to determine what kind of effect they had on the rheological properties of the finished products, i.e., how the penetration and rotational viscosity properties of the finished products were influenced. Based on the results of rotational viscometry, there was a significant difference between the samples that contained poppy seeds, depending on the poppy seed grain size. 


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Review of national standardization 2018/2

Wednesday, June 20, 2018

Author: Csilla Kurucz

 

Published national standards from March, 2018 to May, 2018


03.120.20 Product and company certification. Conformity assessment 

MSZ EN ISO/IEC 17025:2018 General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2017) (published in Hungarian) which has withdrawn the MSZ EN ISO/IEC 17025:2005

13.060 Water quality

MSZ EN ISO 19340:2018 Water quality. Determination of dissolved perchlorate. Method using ion chromatography (IC) (ISO 19340:2017)

MSZ EN ISO 9696:2018 Water quality. Gross alpha activity. Test method using thick source (ISO 9696:2017)


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Domestic panorama 2018/2

Wednesday, June 20, 2018

Author: Gábor Szunyogh

 

Revolutionary changes in microplastic analysis


Following the first microplastic analyses in Hungary, samples taken in the catchment area of the river Tisza were analyzed again by the researchers. Microplastics could be detected in the samples taken from the Eger stream, a tributary of Lake Tisza, from the Great Morotva within the reservoir, and from the river Tisza at Tiszafüred.

It is an alarming phenomenon that, due to the use of large amounts of plastics, particles smaller than 5 mm, i.e., microplastics are also present now in fresh waters, posing environmental and food safety hazards, as they are concentrated in the bodies of aquatic organisms, and thus the organic contaminants (pesticides, drug residues) adsorbed on their surface can enter the bodies of fish.


 

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Outlook 2018/2

Wednesday, June 20, 2018

EFSA news:

 

Fipronil: results of follow-up monitoring published


EFSA has published its analysis of food data collected following the widespread detection of fipronil residues in eggs last summer.

The detection of fipronil residues in eggs by Belgian authorities in July 2017 led to millions of eggs being withdrawn from the market in the European Union. The contamination was caused by illegal use of non-approved veterinary medicinal products in poultry farms.


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