Special Issue "Instrumental and Bioanalytical Methods for Food Contaminant Detection"

A special issue of Toxics (ISSN 2305-6304). This special issue belongs to the section "Environmental Chemistry".

Deadline for manuscript submissions: 30 November 2021.

Special Issue Editors

Prof. Dr. Jana Pulkrabova
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Guest Editor
Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6 – Dejvice, Prague, Czech Republic
Interests: chemical food safety; environmental contaminants; pesticides; analytical chemistry; QA/QC
Dr. Aristeidis Tsagkaris
E-Mail
Guest Editor
Department of Food Analysis and Nutrition, Faculty of Food and Biochemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28 Prague 6 – Dejvice, Prague, Czech Republic
Interests: point-of-care diagnostics; smartphone-based analysis; food safety, pesticide residues, mycotoxins; biosensors; instrumental analysis; liquid chromatography; mass spectrometry; food analysis

Special Issue Information

Dear Colleagues,

Food safety is of paramount importance for a wide variety of stakeholders, namely, producers, industry, governmental bodies, or citizens. However, the intensive and globalized food production indicates that food testing from farm-to-fork is a rather challenging task. In fact, although regulatory requirements are in force globally, contaminated food is still consumed, resulting in (i) health-related problems due to acute toxicity incidents, e.g., consumption of an undeclared allergen; (ii) significant financial losses as in the fipronil case (insecticide in eggs, EU, 2017); and (iii) foodborne diseases such as salmonellosis. Therefore, the development of analytical methods able to provide fit-for-purpose results is necessary to tackle such emerging risks. Two different types of methods (in principle complementary) have been applied, namely, instrumental analysis and screening analytical methods predominantly based on biorecognition events.

We are pleased to invite you to submit papers that showcase and discuss novel analytical methods (both instrumental and sensor-based) in the food safety field. The submitted papers should address rapid, cost-efficient, robust, and sensitive analytical procedures to allow effective testing of toxicologically relevant food contaminants.

This Special Issue aims to provide a fruitful collection of papers (both original and review papers) based on (a) novel chromatographic separation methods coupled to various detectors with special emphasis to mass spectrometric (MS) detection, (b) optical and electrochemical biosensors and their potential to be hyphenated with smartphones as their analytical detector, (c) approaches to automate and miniaturize food contaminant analysis, e.g., lab-on-a-chip (LOC) assays or micro total analysis systems (μTAS), and (d) method validation and cross comparison toward golden standard methods.

We look forward to receiving your contributions.

Prof. Dr. Jana Pulkrabova
Dr. Aristeidis Tsagkaris
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Toxics is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • chromatography
  • mass spectrometry
  • biosensors
  • bioassays
  • point-of-care
  • lab-on-a-chip
  • food safety
  • food contaminants
  • validation

Published Papers (1 paper)

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Research

Article
A Quantitative 1H NMR Method for Screening Cannabinoids in CBD Oils
Toxics 2021, 9(6), 136; https://doi.org/10.3390/toxics9060136 - 10 Jun 2021
Viewed by 718
Abstract
Toxicologically relevant levels of the psychoactive ∆9-tetrahydocannabinol (∆9-THC) as well as high levels of non-psychoactive cannabinoids potentially occur in CBD (cannabidiol) oils. For consumer protection in the fast-growing CBD oil market, facile and rapid quantitative methods to determine the [...] Read more.
Toxicologically relevant levels of the psychoactive ∆9-tetrahydocannabinol (∆9-THC) as well as high levels of non-psychoactive cannabinoids potentially occur in CBD (cannabidiol) oils. For consumer protection in the fast-growing CBD oil market, facile and rapid quantitative methods to determine the cannabinoid content are crucial. However, the current standard method, i.e., liquid chromatography combined with tandem mass spectrometry (HPLC-MS/MS), requires a time-consuming multistep sample preparation. In this study, a quantitative nuclear magnetic resonance spectroscopy (qNMR) method for screening cannabinoids in CBD oils was developed. Contrary to the HPLC-MS/MS method, this qNMR features a simple sample preparation, i.e., only diluting the CBD oil in deuterochloroform. Pulse length-based concentration determination (PULCON) enables a direct quantification using an external standard. The signal intensities of the cannabinoids were enhanced during the NMR spectra acquisition by means of multiple suppression of the triglycerides which are a major component of the CBD oil matrix. The validation confirmed linearity for CBD, cannabinol (CBN), ∆9-THC and ∆8-THC in hemp seed oil with sufficient recoveries and precision for screening. Comparing the qNMR results to HPLC-MS/MS data for 46 commercial CBD oils verified the qNMR accuracy for ∆9-THC and CBD, but with higher limits of detection. The developed qNMR method paves the way for increasing the sample throughput as a complementary screening before HPLC-MS/MS. Full article
(This article belongs to the Special Issue Instrumental and Bioanalytical Methods for Food Contaminant Detection)
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