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Tandem mass spectrometry
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Ebook Interpretation of MS–MS mass spectra of drugs and pesticides includes the following main contents: Provides a general discussion on the fragmentation of even-electron ions (protonated and deprotonated molecules) in both positive-ion and negative-ion modes; This is the reference book for the interpretation of MS–MS mass spectra of small organic molecules; Covers related therapeutic classes of compounds such as drugs for cardiovascular diseases, psychotropic compounds, drugs of abuse and designer drugs, antimicrobials, among many others.
405p
vimeyers
29-05-2024
4
2
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Ebook "Mass spectrometry: Principles and applications (Third edition)" provides students with a complete overview of the principles, theories and key applications of modern mass spectrometry. All instrumental aspects of mass spectrometry are clearly and concisely described: sources, analysers and detectors. Tandem mass spectrometry is introduced early on and then developed in more detail in a later chapter.
502p
coduathanh1122
27-03-2024
5
1
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In this study, a liquid chromatography with tandem mass spectrometry (LC-MS/MS) method was developed and applied to quantify sex hormones: progesterone (PG), testosterone (TS), and 17β-estradiol (E2) in health supplements.
13p
vigojek
02-02-2024
2
1
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Several generic products containing simvastatin are circulating on the Vietnamese market at a more inexpensive price than that of a brand-name one. These formulations, however, have not been assessed for in vivo bioequivalence to the reference product.
9p
vikissinger
21-12-2023
2
1
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For the purpose of determining the residues of some recently registered pesticides in Vietnam agricultural products, a quick and precise approach based on a modification of QuEChERS extraction and liquid chromatography tandem mass spectrometry (LC-MS/MS) has been studied.
10p
visybill
19-07-2023
3
2
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Polychlorinated biphenyls (PCBs) are a typical group of persistent organic pollutants (POPs), which have been listed under Annex A (Elimination) and Annex C (Unintentional production) of the Stockholm Convention. In this study, a gas chromatography tandem mass spectrometry method was developed and applied to analyze concentrations of 28 PCB congeners in some Vietnamese marine fish samples.
17p
viwhitewolf
11-07-2023
5
3
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A sensitive and specific liquid chromatography-tandem mass spectrometry (LCMS/MS) method was developed for the simultaneous analysis of 4 compounds used for treating hypertension as adulterants in herbal products. The method was validated in terms of selectivity, linearity, accuracy, limit of detection (LOD), limit of quantitation (LOQ), and precision in accordance with AOAC and ICH guidelines.
11p
viwolverine
11-07-2023
11
5
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The widespread use of antimicrobials in husbandry has increased antimicrobial residues in animal faeces. Therefore, the investigation of antimicrobials in animal faeces is essential because they are the main cause of environmental pollution. This study analyzed and assessed samples of chiken, cow and swine faeces for seven antimicrobials, namely trimethoprim (TRI), ormethoprim (ORM), ofloxacin (OFL), norfloxacin (NOR), tetracycline (TET), chlortetracycline (CTE) and tylosin (TLS).
9p
vidudley
20-02-2023
6
2
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Oligosaccharides are one of the most important components in mammalian milk. Milk oligosaccharides can promote colonization of gut microbiota and protect newborns from infections. The diversity and structures of MOs differ among mammalian species.
10p
viginny
30-12-2022
8
2
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Adirectinjection, multi residue analytical method separated in two chromatographic runs was developed utilizing scheduled analysis to simultaneously quantify 154 compounds, 84 precursors and 70 transformation products (TPs)/metabolites.
10p
viginny
23-12-2022
9
3
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Fatty acyl-Coenzyme A species (acyl-CoAs) are key biomarkers in studies focusing on cellular energy metabolism. Existing analytical approaches are unable to simultaneously detect the full range of short- , medium-, and long-chain acyl-CoAs, while chromatographic limitations encountered in the analysis of limited amounts of biological samples are an often overlooked problem.
12p
viginny
23-12-2022
4
4
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Insect repellents (IRs) are a group of organic chemicals whose function is to prevent the ability of insects of landing in a surface. These compounds have been found in the environment and may pose a risk to non-target organisms.
8p
viginny
23-12-2022
9
3
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A sensitive and accurate method for the quantification of 1 -Demethyl-1 -nitrosonicotine (NNN) and 4-(methylnitrosamino)-1-(3-Pyridyl)-1-butanone (NNK) in indoor air was developed and validated. To this aim, a novel approach for the collection of two tobacco-specific nitrosamines, using silica sorbent cartridges followed by simplified sample preparation and isotope dilution liquid chromatography/electrospray ionization tandem mass spectrometry, was applied.
10p
viginny
23-12-2022
3
3
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Plants accumulate several thousand of phenolic compounds, including lignins and flavonoids, which are mainly synthesized through the phenylpropanoid pathway, and play important roles in plant growth and adaptation.
12p
viginny
23-12-2022
6
3
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A semi-quantitative method was developed to monitor the misuse of 15 SARM compounds belonging to nine different families, in urine matrices from a range of species (equine, canine, human, bovine and murine).
14p
viginny
23-12-2022
9
3
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This research focuses on retention mechanisms in a LC column with C18 stationary phase when novel eluent additives (HFIP, HFTB and TFE as well as NFTB and perfluoropinacol) are used. The retention factors between novel eluent additives and conventional ones like ammonium acetate and ammonium bicarbonate at different eluent pH values were compared.
8p
viginny
23-12-2022
6
2
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In this work, an easy and fast procedure for the selective multiresidue determination of 14 highly polar pesticides (including glyphosate, glufosinate, ethephon and fosetyl) and metabolites in beverages is presented.
8p
viginny
23-12-2022
11
3
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The first quantitative multiclass approach enabling the accurate quantification of >1200 biotoxins, pesticides and veterinary drugs in complex feed using liquid chromatography tandem mass spectrometry (LC–MS/MS) has been developed.
9p
viginny
23-12-2022
10
3
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In the present document, we report the development of an analytical method consisting of a sequential direct-immersion/headspace solid-phase microextraction (DI-HS-SPME) followed by gas-phase chromatography and tandem mass spectrometry (GC-MS/MS).
9p
viginny
23-12-2022
8
3
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Due to the heterogeneous and isomeric nature of glycans, the development of an advanced separation of distinct glycan isomers is essential for glycan research and application. In this study, we utilized porous graphite carbon (PGC) chromatography for the separation of isomeric oligosaccharides without reduction or chemical derivatization at 190 °C in a custom-built heating oven.
12p
viginny
23-12-2022
10
3
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