HPLC-DAD/MS-ESI
Phenolic profile in the quality control of walnut (Juglans regia L.) leaves
... by HPLC/ DAD/MS/MS – ...on HPLC-DAD quantification of major phenolics was developed and applied to six dif- ferent cultivars growing under the same agricultural, geographical and ...
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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 ...
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Desenvolvimento de um método de screening para anfetaminas em urina empregando ESI-MS com confirmação por GC-MS.
... Assim como na cromatografia a gás, a sensibilidade e a especificidade de um método de screening baseado em CLAE estão relacionadas ao tipo de detecção utilizado. Muitos equipamentos utilizam um detector de ultravioleta ...
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J. Braz. Chem. Soc. vol.21 número4
... all pesticides. The calibration curves were linear over the whole concentration range tested for all pesticides under study with correlation coeficients (r) better than 0.998 as outlined in Table 3. The precision ...
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Phlorotannin Extracts from Fucales Characterized by HPLC-DAD-ESI-MSn: Approaches to Hyaluronidase Inhibitory Capacity and Antioxidant Properties
... Abstract: Purified phlorotannin extracts from four brown seaweeds (Cystoseira nodicaulis (Withering) M. Roberts, Cystoseira tamariscifolia (Hudson) Papenfuss, Cystoseira usneoides (Linnaeus) M. Roberts and Fucus spiralis ...
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Identification of some chemical constituents of Indigofera hirsuta Linn. (Fabaceae) by HPLC-ESI-MS (TOF) and evaluation of the antiradical activity.
... os dados de UV e IV estão apresentados no material suplementar. Para conirmar a presença das substâncias nos respectivos ext. MeOH e extrato aquoso, as substâncias isoladas (1-6) e os extratos foram analisadas por ...
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Detecção in silico e caracterização dos constituintes micromoleculares majoritários do fungo endofítico Colletotrichum gloeosporioides isolado de folhas de Garcinia xanthochymus usando HPLC-DAD-HRMS e GC-MS
... com HPLC, devido à sua versatilidade, é a ESI (ionização por electrospray) (MATHIS and McCORD, ...2004). ESI é um processo pelo qual, à pressão atmosférica, um campo elétrico intenso dispersa uma ...
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J. Braz. Chem. Soc. vol.21 número12
... A degradation system using metallic iron and hydrogen peroxide (Fenton reaction) was employed for the degradation of the diuron herbicide. In order to obtain the maximum degradation the main conditions such as pH, ...
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Contents lists available at ScienceDirect
... Given the increasing consumers demand for novelty, tea companies have been presenting new added value products such as reserve lots of aromatic plants. Herein, infusions from different lots of three aromatic plants were ...
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J. Braz. Chem. Soc. vol.21 número8
... Our previous research found that the crude extract of Neo-T. siphonanthun exhibited an effective DPPH (1,1-diphenyl-2-picryhydrazyl) radical scavenging activity. In this study an online rapid screening method, ...
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Espectrometria de massas com ionização electrospray (ESI-MS) e métodos quimiométricos: caracterização de azeite de oliva (extra virgem e puro) e outros óleos vegetais e quantificação de óleos adulterantes em azeite de oliva extra virgem
... positivo, ESI(+)- MS, das amostras dos azeites de oliva e demais óleos vegetais (soja, milho, girassol e canola) é possível se observar uma quantidade maior de sinais (cátions), embora nem todos tenham sido ...
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Estudo fitoquímico de extratos polares e infusão das folhas de Terminalia catappa L. (Combretaceae) e avaliação de suas atividades antiulcerogênica e mutagênica
... Di-O-galoil-β-D-glicose, HHDP-acetilglicosídeo, HHDP-hexosídeo, ácido elágico hexosídeo, ácido galágico e apigenina 8-C-(2’’-galoil)-β-D-glicopiranosil. Estes metabolitos foram confirmados por experimentos ...
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Analysis of pharmaceutical compounds in water by SPE-UPLC-ESI-MS/MS.
... ANALYSIS OF PHARMACEUTICAL COMPOUNDS IN WATER BY SPE-UPLC-ESI-MS/MS. A method was developed for the analysis of 31 pharmaceutical compounds in Lisbon’s drinking water system, using solid-phase ...
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2-(4-IODINE-2,5-DIMETHOXYPHENYL)-N-[(2-METHOXYPHENYL)METHYL]ETAMINE OR 25I-NBOMe: CHEMICAL CHRACTERIZATION OF A DESIGNER DRUG.
... 2-(4-IODINE-2,5-DIMETHOXYPHENYL)-N-[(2-METHOXYPHENYL)METHYL]ETAMINE OR 25I-NBOMe: CHEMICAL CHRACTERIZATION OF A DESIGNER DRUG. Drug traficking and the introduction of new drugs onto the illicit market are one of the main ...
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Reproducibility of an HPLC-ESI-MS/MS method for the measurement of stable-isotope enrichment of in vivo-labeled muscle ATP synthase beta subunit.
... Initially, a full-scan spectrum was acquired followed by collision-induced dissociation mass spectra of the 10 most abundant ions in the survey scan to determine if there were b- F1-ATPase peptides with a high MS ...
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HPLC DAD methodology for the quantification of organic acids, furans and
... [43]. DAD methods are the most common [11–13, 38, 40, 41, 44–56], but other detection methods as electrochemical [57, 58] and MS [59–61] have also been ...
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Determination of estrogens in drinking water using HPLC-DAD.
... DETERMINATION OF ESTROGENS IN DRINKING WATER USING HPLC-DAD. An analytical procedure for determination of estriol, 17β-estradiol, estrone and 17α-ethinylestradiol in drinking water is presented. The method ...
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Potential diagnostic of Branched-Chain Ketoaciduria by HPLC-DAD
... applied to biological fluids constitute important tools for diagnosing diseases caused by errors in metabolism. Liquid chromatography has been widely and succesfully used in this context because of its high precision, ...
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Lopes, Inês Costa
... by HPLC-UV and the identification by LC-MS/MS. The HPLC-UV method was validated for the quantification and has proven to be fit for ...
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Estudo de plantas silvestres comestíveis da região mediterrânica como fontes de compostos bioativos
... por HPLC-DAD os compostos fenólicos mais comuns e abundantes nos extratos analisados são os ácidos clorogénico ...por HPLC-DAD, o que torna mais difícil a sua análise e a identificação de ...
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