A new issue of this journal has just been published. To see abstracts of the papers it contains (with links through to the full papers) click here:
Selected papers from the latest issue:
Simultaneous determination of thirteen polycyclic aromatic hydrocarbons and twelve aldehydes in cooked food by an automated on-line solid phase extraction ultra high performance liquid chromatography tandem mass spectrometry
06 July 2011, 20:41:17
Publication year: 2011
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Fabio, Gosetti , Ugo, Chiuminatto , Eleonora, Mazzucco , Elisa, Robotti , Giorgio, Calabrese , ...
An on-line solid phase extraction (SPE) ultra high performance liquid chromatography tandem mass spectrometry method has been developed for the simultaneous identification and determination of thirteen polycyclic aromatic hydrocarbons (PAHs) and twelve aldehydes (derivatized with 2,4–dinitrophenylhydrazine).The chromatographic conditions have been optimized to obtain the maximum of sensitivity and resolution taking into account the different retention interactions and the different ionization conditions of PAHs and derivatized aldehydes. LOD values ranging from 0.028 to 0.768μgL–1 for PAHs and from 0.002 to 0.125μgL–1 for aldehydes were obtained. The resolution permitted the separation of four couples of PAH isomers. Sample pre-treatment and SPE were...
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Fabio, Gosetti , Ugo, Chiuminatto , Eleonora, Mazzucco , Elisa, Robotti , Giorgio, Calabrese , ...
An on-line solid phase extraction (SPE) ultra high performance liquid chromatography tandem mass spectrometry method has been developed for the simultaneous identification and determination of thirteen polycyclic aromatic hydrocarbons (PAHs) and twelve aldehydes (derivatized with 2,4–dinitrophenylhydrazine).The chromatographic conditions have been optimized to obtain the maximum of sensitivity and resolution taking into account the different retention interactions and the different ionization conditions of PAHs and derivatized aldehydes. LOD values ranging from 0.028 to 0.768μgL–1 for PAHs and from 0.002 to 0.125μgL–1 for aldehydes were obtained. The resolution permitted the separation of four couples of PAH isomers. Sample pre-treatment and SPE were...
SIMULTANEOUS DETERMINATION OF TRYPTOPHAN, KYNURENINE, KYNURENIC AND XANTHURENIC ACIDS IN HONEY BY LIQUID CHROMATOGRAPHY WITH DIODE ARRAY, FLUORESCENCE AND TANDEM MASS SPECTROMETRY DETECTION
06 July 2011, 20:41:17
Publication year: 2011
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
María E., Soto , Ana M., Ares , José, Bernal , María J., Nozal , José L., Bernal
A liquid chromatography method using diode array fluorescence detection and atmospheric pressure chemical ionization mass spectrometry (LC-DAD-FLD and LC–APCI-MS/MS) was developed to quantify the levels of tryptophan (TRP), kynurenine (KYN), kynurenic (KYNA) and xanthurenic (XA) acids in honey. This procedure involved isolating the compounds of interest via solid-phase extraction (SPE) with mixed-mode polymeric cartridges. Chromatographic separation of the analytes was performed in isocratic mode on a Synergi 4μ Hydro-RP 80Å (150×4.60mm i.d.) analytical column at 30°C. The mobile phase of 20mM ammonium formate (pH 4) and methanol was passed at a flow rate of 0.5mL/min. In replicate sets of spiked...
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
María E., Soto , Ana M., Ares , José, Bernal , María J., Nozal , José L., Bernal
A liquid chromatography method using diode array fluorescence detection and atmospheric pressure chemical ionization mass spectrometry (LC-DAD-FLD and LC–APCI-MS/MS) was developed to quantify the levels of tryptophan (TRP), kynurenine (KYN), kynurenic (KYNA) and xanthurenic (XA) acids in honey. This procedure involved isolating the compounds of interest via solid-phase extraction (SPE) with mixed-mode polymeric cartridges. Chromatographic separation of the analytes was performed in isocratic mode on a Synergi 4μ Hydro-RP 80Å (150×4.60mm i.d.) analytical column at 30°C. The mobile phase of 20mM ammonium formate (pH 4) and methanol was passed at a flow rate of 0.5mL/min. In replicate sets of spiked...
Micelle to Solvent Stacking of Two Alkaloids in Nonaqueous Capillary Electrophoresis
06 July 2011, 20:41:17
Publication year: 2011
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Hua-dong, Zhu , Wen-juan, Lü , Hong-hong, Li , Yan-hua, Ma , Shao-qiang, Hu , ...
This paper for the first time describes the development of micelle to solvent stacking (MSS) to nonaqueous capillary electrophoresis (NACE). In this proposed MSS-NACE, sodium dodecyl sulfate (SDS) micelles transport, release, and focus analytes from the sample solution to the running buffer using methanol as its solvent. After the focusing step, the focused analytes were separated via NACE. The focusing mechanism and influencing factors were discussed using berberine (BBR) and jatrorrhizine (JTZ) as model compounds. And the optimum condition was obtained as following: 50mM ammonium acetate, 6% (v/v) acetic acid and 10mM SDS in redistilled water as sample matrix, 50mM...
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Hua-dong, Zhu , Wen-juan, Lü , Hong-hong, Li , Yan-hua, Ma , Shao-qiang, Hu , ...
This paper for the first time describes the development of micelle to solvent stacking (MSS) to nonaqueous capillary electrophoresis (NACE). In this proposed MSS-NACE, sodium dodecyl sulfate (SDS) micelles transport, release, and focus analytes from the sample solution to the running buffer using methanol as its solvent. After the focusing step, the focused analytes were separated via NACE. The focusing mechanism and influencing factors were discussed using berberine (BBR) and jatrorrhizine (JTZ) as model compounds. And the optimum condition was obtained as following: 50mM ammonium acetate, 6% (v/v) acetic acid and 10mM SDS in redistilled water as sample matrix, 50mM...
Some Theoretical and Practical Aspects in the Separation of Humic Substances by Combined Liquid Chromatography Methods
06 July 2011, 20:41:17
Publication year: 2011
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Milan, Hutta , Róbert, Góra , Radoslav, Halko , Mária, Chalányová
Permanent need to understand nature, structure and properties of humic substances influences also separation methods that are in a wide scope used for fractionation, characterization and and analysis of humic substances (HS). At the first glance techniques based on size-exclusion phenomena are the most useful and utilized for relating elution data to the molecular mass distribution of HS, however with some limitations and exceptions, respectively, in the structural investigation of HS. The second most abundant separation mechanism is reversed-phase based on weak hydrophobic interactions beneficially combined with the step gradients inducing distinct features in rather featureless analytical signal of HS....
Source: Journal of Chromatography A, In Press, Accepted Manuscript, Available online 6 July 2011
Milan, Hutta , Róbert, Góra , Radoslav, Halko , Mária, Chalányová
Permanent need to understand nature, structure and properties of humic substances influences also separation methods that are in a wide scope used for fractionation, characterization and and analysis of humic substances (HS). At the first glance techniques based on size-exclusion phenomena are the most useful and utilized for relating elution data to the molecular mass distribution of HS, however with some limitations and exceptions, respectively, in the structural investigation of HS. The second most abundant separation mechanism is reversed-phase based on weak hydrophobic interactions beneficially combined with the step gradients inducing distinct features in rather featureless analytical signal of HS....
No comments:
Post a Comment