HPLC-MS
An improved HILIC HPLC-MS/MS method for the determination of β-ODAP and Its α isomer in lathyrus sativus
... In this study, a HPLC-MS/MS method for the quantification of α- and β-ODAP in grass pea samples was developed, optimized, and validated. The method was validated according to the most recent ...
19
Importância da metodologia na dosagem de testosterona sérica: comparação entre um imunoensaio direto e um método fundamentado em cromatografia líquida de alta performance e espectrometria de massa em tandem (HPLC/MS-MS).
... por HPLC/MS-MS, os valores obtidos foram 21 ng/ dL (0,73 nmol/L) e 7 a 795 ng/dL (0,24 a 27,6 nmol/L, ...por HPLC/MS-MS significativa- mente mais baixos (p < ...
6
Development and validation of an HPLC-MS/MS method for the early diagnosis of aspergillosis.
... Invasive aspergillosis is an opportunistic infection that is mainly caused by Aspergillus fumigatus, which is known to produce several secondary metabolites, including gliotoxin, the most abundant metabolite produced ...
9
Alanine-glyoxylate aminotransferase 2 (AGXT2) polymorphisms have considerable impact on methylarginine and β-aminoisobutyrate metabolism in healthy volunteers.
... Elevated plasma concentrations of asymmetric (ADMA) and symmetric (SDMA) dimethylarginine have repeatedly been linked to adverse clinical outcomes. Both methylarginines are substrates of alanine-glyoxylate ...
12
Bioprospecção em espécies de Inga (Fabaceae Mimosoideae)
... by HPLC-PDA, HPLC-MS, LC-SPE-TT and NMR ...by HPLC-PDA detected the presence of one anthocyanin from aqueous fraction in five other anthocyanins in the methanolic fraction from seeds of ...
32
Drugs of abuse and metabolites in urban wastewater: a case study, municipality of Rio de Janeiro, Brazil
... contamination. However, the study of these pollutants becomes important since the magnitude, nature and consumption patterns can be evaluated through the range of compounds detected in wastewater treatment plant (WWTP). ...
11
Braz. J. Pharm. Sci. vol.51 número4
... via HPLC using a Hypersil ODS (C18) column (250 x ...of HPLC runs were used. HPLC-PDA failed to indicate Valsartan degradation under forced acid degradation, showing an insigniicant peak area ...
8
Phenolic profile in the quality control of walnut (Juglans regia L.) leaves
... by HPLC/DAD analysis revealed that phenolic acids and flavonoids were the two main groups of compounds in walnut leaf ...nm. HPLC-MS data provided some interesting information about those ...the ...
7
Aspectos químicos envolvidos nas interações de Citrus com fitopatógenos
... PCR, HPLC-DAD e HPLC-MS/MS foram aplicadas na avaliação da diferença de metabolismo entre plantas com sintomas de greening e plantas ...técnicas HPLC-DAD e LC-MS/MS também ...
167
Characterization of flavonoids and phenolic acids in Myrcia bella cambess. Using FIA-ESI-IT-MSn and HPLC-PAD-ESI-IT-MS combined with NMR
... hazardous. HPLC–MS plays a prominent role as an analytical tool for detecting and identifying pharmacologically active metabolites and/or reactive metabolites ...methods, MS not just allows ...
15
Contents lists available at ScienceDirect
... For the identification of phenolic compounds, retention times, UV–VIS and mass spectra were compared with available standards (apigenin 6-C-glucoside ≥ 99%, apigenin 7-O-glucoside ≥ 99%, caffeic acid ≥ 99%, chlorogenic ...
7
J. Braz. Chem. Soc. vol.15 número4
... Alguns triterpenos quinonametídicos são conhecidos pela sua citotoxicidade, havendo relatos destas substâncias em várias espécies do gênero Maytenus (Celastraceae), inclusive em Maytenus aquifolium Martius, uma das ...
5
J. Braz. Chem. Soc. vol.21 número8
... HPLC-RSD-DAD-ESI/MS method followed by HSCCC and NMR experiments was successively developed for the fast screening and purification of isomeric radical scavengers from active fraction of Neo-T. ...
6
Phenolic profile of Sercial and Tinta Negra Vitis vinifera L. grape skins by HPLC–DAD–ESI-MS
... The phenolic composition and properties of grapes and wines has been extensively studied by spectrophotometric methods and by high performance liquid chromatography (HPLC) coupled with ultraviolet (UV) or diode ...
11
Antinociceptive activity of the HPLC- and MS-standardized hydroethanolic extract of Pterodon emarginatus Vogel leaves
... The ESI-MS spectra of saponin 12 and 13 exhibited deprotonated molecules at m/z 953 and m/z 955, respectively. The fragmentation pattern, which is similar to saponins 10 and 11, produced fragment ions attributed ...
8
Determinação de compostos fenólicos por HPLC
... de HPLC corresponde à capacidade de fornecer resultados instrumentais, proporcionais à concentração da substância a analisar na amostra através de uma relação ...
136
Cromatografia Líquida de Alta Eficiência (HPLC)
... do HPLC: foi utilizado um cromatógrafo líquido da marca Shimadzu® (Kyoto, Japan), equipado com um degaseificador (DGU-20A3), com auto- injetor (SIL-20A HT), duas bombas LC-10AD e detector de arranjos de diodos ...
10
Arsenic Speciation in Fish and Rice by HPLC-ICP-MS Using Salt Gradient Elution
... ion-exchange HPLC- ICP-MS, laboratories depend on the purchase of this column to carry out speciation ...the HPLC-ICP-MS separation of five arsenic species using another column, namely a ...
8
Chemical characterization of the photodegradation products of midazolam complexes with randomly methylated-β-cyclodextrin by HPLC and LC-MS/MS
... robustness of the method was demonstrated during method development, when it was shown that the best peak resolution was reached when the pH of the mobile phase was between 6 and 8, the concentration of ammonium acetate ...
17
Estudo da determinação do 1-Nitropireno em material particulado atmosférico
... A ocorrência de NHPAs associados com MPA foi investigado por FEILBERG et al., 2001 em uma região urbana e uma região semi rural da Dinamarca. Para este trabalho um método baseado em GC/MS foi desenvolvido e ...
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