Results 31 to 40 of about 14,031,935 (298)

Use of Passive and Grab Sampling and High-Resolution Mass Spectrometry for Non-Targeted Analysis of Emerging Contaminants and Their Semi-Quantification in Water

open access: yesMolecules, 2022
Different groups of organic micropollutants including pharmaceuticals and pesticides have emerged in the environment in the last years, resulting in a rise in environmental and human health risks. In order to face up and evaluate these risks, there is an
Đorđe Tadić   +4 more
doaj   +1 more source

A Data-Independent Methodology for the Structural Characterization of Microcystins and Anabaenopeptins Leading to the Identification of Four New Congeners

open access: yesToxins, 2019
Toxin-producing cyanobacteria are responsible for the presence of hundreds of bioactive compounds in aquatic environments undergoing increasing eutrophication.
Audrey Roy-Lachapelle   +3 more
doaj   +1 more source

Collision Cross Section Prediction with Molecular Fingerprint Using Machine Learning

open access: yesMolecules, 2022
High-resolution mass spectrometry is a promising technique in non-target screening (NTS) to monitor contaminants of emerging concern in complex samples. Current chemical identification strategies in NTS experiments typically depend on spectral libraries,
Fan Yang   +3 more
doaj   +1 more source

Quantification for non-targeted LC/MS screening without standard substances [PDF]

open access: yesScientific Reports, 2020
AbstractNon-targeted and suspect analyses with liquid chromatography/electrospray/high-resolution mass spectrometry (LC/ESI/HRMS) are gaining importance as they enable identification of hundreds or even thousands of compounds in a single sample. Here, we present an approach to address the challenge to quantify compounds identified from LC/HRMS data ...
Jaanus Liigand   +5 more
openaire   +2 more sources

Preliminary Automated Determination of Edibility of Alternative Foods: Non-Targeted Screening for Toxins in Red Maple Leaf Concentrate

open access: yesPlants, 2019
Alternative food supplies could maintain humanity despite sun-blocking global catastrophic risks (GCRs) that eliminate conventional agriculture. A promising alternative food is making leaf concentrate.
Joshua M. Pearce   +2 more
doaj   +1 more source

Non-target screening and risk assessment of organophosphate esters (OPEs) in drinking water resource water, surface water, groundwater, and seawater

open access: yesEnvironment International, 2022
By use of an integrated target, suspect, and non-target screening strategy, we investigated occurrence and spatial distribution of organophosphate esters (OPEs) in four types of water (drinking water resource water, surface water, groundwater, and ...
Jianan Huang   +3 more
doaj   +1 more source

Machine Learning for Absolute Quantification of Unidentified Compounds in Non-Targeted LC/HRMS

open access: yesMolecules, 2022
LC/ESI/HRMS is increasingly employed for monitoring chemical pollutants in water samples, with non-targeted analysis becoming more common. Unfortunately, due to the lack of analytical standards, non-targeted analysis is mostly qualitative. To remedy this,
Emma Palm, Anneli Kruve
doaj   +1 more source

GC-IMS data on the discrimination between geographic origins of olive oils

open access: yesData in Brief, 2022
Gas chromatography hyphenated with ion mobility spectrometry (GC-IMS) is an emerging benchtop technique for sensitive and selective detection of volatile organic compounds.
Joscha Christmann   +2 more
doaj   +1 more source

Metabolomics Approach on Non-Targeted Screening of 50 PPCPs in Lettuce and Maize

open access: yesMolecules, 2022
The metabolomics approach has proved to be promising in achieving non-targeted screening for those unknown and unexpected (U&U) contaminants in foods, but data analysis is often the bottleneck of the approach. In this study, a novel metabolomics analytical method via seeking marker compounds in 50 pharmaceutical and personal care products (PPCPs ...
Xue, Weifeng   +5 more
openaire   +3 more sources

Exploring the efficacy of metabarcoding and non-target screening for detecting treated wastewater

open access: yesScience of The Total Environment, 2023
Wastewater treatment processes can eliminate many pollutants, yet remainder pollutants contain organic compounds and microorganisms released into ecosystems. These remainder pollutants have the potential to adversely impact downstream ecosystem processes, but their presence is currently not being monitored.
Sieber, Guido   +12 more
openaire   +2 more sources

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