Results 251 to 260 of about 255,317 (292)
A sensitive method detecting trace levels of levonorgestrel using LC-HRMS
Contraception, 2019 To develop a high resolution mass spectrometry (HRMS) method to quantify levonorgestrel (LNG) in serum.Levonorgestrel was extracted using solid phase extraction and measured using liquid chromatography (LC) HRMS.Low limit of quantification (LLOQ) was 25 pg/mL and low limit of detection (LLOD) was 12.5 pg/mL. Precision and accuracy bias were
Sandy, Abujrais +6 more
openaire +3 more sources
Forensic drug screening by liquid chromatography hyphenated with high-resolution mass spectrometry (LC-HRMS) [PDF]
TrAC - Trends in Analytical Chemistry, 2023 Liquid chromatography-high resolution mass spectrometry (LC-HRMS) has been widely used for screening small organic molecules in complex samples. Its selectivity and sensitivity allow for broad-scope screening of thousands of analytes.
Pia Johansson Heinsvig +2 more
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Identification of etazene (etodesnitazene) metabolites in human urine by LC‐HRMS
Drug Testing and Analysis, 2022AbstractEtazene (or etodesnitazene) is a novel and highly active synthetic opioid belonging to the rapidly evolving and emerging group of “nitazenes.” Etazene metabolites were identified through analysis of a human urine sample. The sample was obtained from a 25‐year‐old man who attempted suicide by taking a new psychoactive substances (NPS) cocktail ...
Nick Verougstraete +4 more
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Lipidomic analysis of geopropolis of Brazilian stingless bees by LC-HRMS
Food Research International, 2023Stingless bees (Meliponini) represent over than 500 species, found in tropical and sub-tropical regions of the world. They produce geopropolis, a resinous natural product containing bioactive compounds, which is commonly used in folk medicine. In the current study, LC-HRMS and bioinformatic tools were used to carry out for the first time the lipidomic ...
João, Fabio Turco +2 more
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Untargeted LC-HRMS metabolomics reveals candidate biomarkers for mucopolysaccharidoses
Clinica Chimica Acta, 2023Mucopolysaccharidoses (MPSs) are inherited genetic diseases caused by an absence or deficiency of lysosomal enzymes responsible for catabolizing glycosaminoglycans (GAGs). Undiagnosed patients, or those without adequate treatment in early life, can be severely and irreversibly affected by the disease.
Clarisse L, Torres +4 more
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Steroid profile analysis by LC-HRMS in human seminal fluid
Journal of Chromatography B, 2020Steroids are essential hormones that play a crucial role in homeostasis of many biological processes including sexual development, spermatogenesis, sperm physiology and fertility. Although steroids have been largely studied in many biological matrices (such as urine and plasma), there is very limited information of the steroid content and their study ...
Olesti E +7 more
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Simultaneous LC-HRMS determination of 28 benzodiazepines and metabolites in hair
Analytical and Bioanalytical Chemistry, 2011A liquid chromatography-high resolution mass spectrometry (LC-HRMS) method for the simultaneous identification and quantification of 28 benzodiazepines, including 6 metabolites, in 50 mg of hair has been validated. Positive ion electrospray ionization and HRMS determination in full-scan mode were realized on an Orbitrap mass spectrometer at a nominal ...
VOGLIARDI, SUSANNA +4 more
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A novel LC-HRMS method reveals cysteinyl and glutathionyl polysulfides in wine
Talanta, 2020A novel ultra high pressure liquid chromatography combined with high resolution mass spectrometry (UHPLC-HRMS) method was developed to study glutathionyl and cysteinyl polysulfides in wine. Different HPLC columns were investigated in order to optimise the chromatographic resolution of the polysulfide standard mixtures synthesised in-house.
van Leeuwen, Katryna A +5 more
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LC-HRMS analysis of 13 classes of pharmaceutical substances in food supplements
Food Additives & Contaminants: Part B, 2023Food supplements should not contain substances considered unsafe or pose a health risk to consumers. In recent years illegal adulterants have been found in various functional foods without notification of their presence or amount in the labelling. In this study, a validated method was developed and applied as a screening method to detect 124 forbidden ...
Luigi, Giannetti +7 more
openaire +2 more sources