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Chemosphere 2021 Mar 1;275:130036. Epub 2021 Mar 1.

Université de Paris-Est, ANSES, Laboratory for Food Safety, 94700, Maisons-Alfort, France. Electronic address:

Predicting chromatographic retention times of pesticides has become more and more important for suspect and non-target screening. Indeed, high-resolution mass spectrometry hyphenated (HRMS) to liquid chromatography (LC) are of growing interest for research and monitoring of pesticides, their metabolites and transformation products. The development of quantitative structure-retention relationship models require selecting the most adequate and best set of molecular descriptors and the best machine-learning algorithm. Read More

Chemosphere 2021 Feb 21;275:130010. Epub 2021 Feb 21.

Universidade Federal de São Carlos, Departamento de Química, 13565-905, São Carlos, SP, Brazil. Electronic address:

Water contamination by contaminants of emerging concern is one of the main challenges to be solved by our desired sustainable society. In the same time, different technologies for water treatment are becoming enough mature to be implemented. In this work, two different advanced oxidation processes (AOP) were investigated: i) electrochemical processes (electrochemical, photoassisted electrochemical, electro Fered-Fenton, and photo-electro Fered-Fenton - PEF-Fered) using a BDD and DSA® electrodes under UVA and UVC irradiation (9 W) and ii) solar-based AOP using four distinct oxidants (HOCl, HO, SO, HSO) in the presence or absence of Fe ions to oxidize and mineralize imidacloprid (IMD: 50 mg L) containing solutions. Read More

J Hazard Mater 2021 Feb 27;414:125549. Epub 2021 Feb 27.

Analytical and Testing Center of Beijing Normal University, Beijing 100875, China. Electronic address:

The pollution caused by the abuse of antibiotics has posed a serious threat to the ecological environment and human health, so development of effective strategies for degradation and disposal of antibiotic residues is urgently needed. In this work, penicillinase, a kind of β-lactamase, was immobilized into zeolitic imidazolate framework-8 (ZIF-8) by self-assembly method and the catalytic performance of the β-lactamase@ZIF-8 porous materials for degradation of penicillins has been investigated by high performance liquid chromatography coupled with mass spectrometry. The results illustrated that the catalytic activity of the encapsulated enzyme was significantly enhanced comparing with that of free enzyme. Read More

Forensic Sci Int 2021 Feb 26;321:110746. Epub 2021 Feb 26.

King Abdul-Aziz Hospital, Laboratory Department, Jeddah, Saudi Arabia. Electronic address:

A more than 500% increase in the number of deaths involving methamphetamine occurred between 2016 and 2018 in Jeddah, Saudi Arabia. As such, this report employed a validated liquid chromatography tandem mass spectrometry method to quantify methamphetamine and its metabolites in bodily fluids from 47 postmortem cases in which methamphetamine was involved. The mean age of the deceased was 33 years old (median: 30, range: 16-63), and 94% were male. Read More

Forensic Sci Int 2021 Feb 27;321:110745. Epub 2021 Feb 27.

Department of Forensic Pathology, School of Forensic Medicine, Southern Medical University, 510515 Guangzhou, China. Electronic address:

We present a case of fatal poisoning from accidental ingestion of Gelsemium elegans (G. elegans), a rarely toxic plant. A 41-year-old man was found dead, at his home, 6 h after drinking homemade herbal liqueur during lunch. Read More