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 ..Determination of Cobalamins (Hydroxo-, Cyano-, Adenosyl- and Methyl-cobalamins) in Seawater Using Reversed-Phase Liquid Chromatography with Diode-Array Detection
02 June 2011, 21:39:25
Publication year: 2011
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Ana, Suárez-Suárez , Antonio, Tovar-Sánchez , Ramón, Rosselló-Mora
A High-Performance Liquid Chromatography method was developed for the separation and determination of four cobalamins in seawater. Chromatographic separation was performed on a reversed-phase Discovery RP-Amide C16 column with buffer potassium dihydrogenphosphate and acetonitrile as the mobile phases in linear gradients elution mode. Cobalamins were previously preconcentrated in C18 resins cartridges. Detection was performed using UV- Dyode Array Detector in a range of λ of 200-400nm. The method showed to be linear over a range of 1 to 300 ng mL-1 with acceptable precision and accuracy. The detection limits ranged between 0.07 pg mL-1 for 5́- deoxyadenosylcobalamina and 0.5 pg...
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Ana, Suárez-Suárez , Antonio, Tovar-Sánchez , Ramón, Rosselló-Mora
A High-Performance Liquid Chromatography method was developed for the separation and determination of four cobalamins in seawater. Chromatographic separation was performed on a reversed-phase Discovery RP-Amide C16 column with buffer potassium dihydrogenphosphate and acetonitrile as the mobile phases in linear gradients elution mode. Cobalamins were previously preconcentrated in C18 resins cartridges. Detection was performed using UV- Dyode Array Detector in a range of λ of 200-400nm. The method showed to be linear over a range of 1 to 300 ng mL-1 with acceptable precision and accuracy. The detection limits ranged between 0.07 pg mL-1 for 5́- deoxyadenosylcobalamina and 0.5 pg...
An integrated experimental and analytical approach to the chemical state imaging of iron in brain gliomas using x-ray absorption near edge, structure spectroscopy
02 June 2011, 21:39:25
Publication year: 2011
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Magdalena, Szczerbowska-Boruchowska , Marek, Lankosz , Mateusz, Czyzycki , Dariusz, Adamek
X-ray absorption near-edge structure spectroscopy is used for human neoplastic tissues in order to investigate distributions and chemical states of iron. The specimens used in this study were obtained intraoperatively from brain gliomas of different types and various grades of malignancy and from a control subject. An integrated experimental and analytical approach toward topographic and quantitative analysis in thin freeze-dried cryosections is presented. The full XANES spectra at the Fe absorption K edge show the presence of both chemical forms of Fe in the analyzed points of the tissues. The main goal of the work is the chemical state imaging...
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Magdalena, Szczerbowska-Boruchowska , Marek, Lankosz , Mateusz, Czyzycki , Dariusz, Adamek
X-ray absorption near-edge structure spectroscopy is used for human neoplastic tissues in order to investigate distributions and chemical states of iron. The specimens used in this study were obtained intraoperatively from brain gliomas of different types and various grades of malignancy and from a control subject. An integrated experimental and analytical approach toward topographic and quantitative analysis in thin freeze-dried cryosections is presented. The full XANES spectra at the Fe absorption K edge show the presence of both chemical forms of Fe in the analyzed points of the tissues. The main goal of the work is the chemical state imaging...
Determination of the Total and Extractable Mass Fractions of Cadmium and Lead in Mineral Feed by using Isotope Dilution Inductively Coupled Plasma Mass Spectrometry
02 June 2011, 21:39:25
Publication year: 2011
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Emilia, Vassileva , Michel, Hoenig
This paper describes the determination of the total and extractable mass fractions of Cd and Pb in mineral feed test sample distributed by the Community Reference Laboratory for Heavy Metals in Feed and Food (CRL-HM), in the frame of the fifth interlaboratory comparison for the European Union National Reference Laboratories (NRL).The developed in this study protocol for the total and extractable mass fractions of Pb and Cd in mineral feed sample is based on isotope dilution inductively coupled plasma mass spectrometry (ID ICP-MS). The applied dual spiking approach reduced by 50% the number of analytical steps. The addition of hydrofluoric...
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Emilia, Vassileva , Michel, Hoenig
This paper describes the determination of the total and extractable mass fractions of Cd and Pb in mineral feed test sample distributed by the Community Reference Laboratory for Heavy Metals in Feed and Food (CRL-HM), in the frame of the fifth interlaboratory comparison for the European Union National Reference Laboratories (NRL).The developed in this study protocol for the total and extractable mass fractions of Pb and Cd in mineral feed sample is based on isotope dilution inductively coupled plasma mass spectrometry (ID ICP-MS). The applied dual spiking approach reduced by 50% the number of analytical steps. The addition of hydrofluoric...
Anodized aluminum wire as a solid-phase microextractionfiber for rapid determination of volatile constituents in medicinal plant
02 June 2011, 21:39:25
Publication year: 2011
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Mohammad, BagherGholivand , MarziehPiryaei , Mir Mahdi, Abolghasemi
Headspace solid phase microextraction using anodized aluminum fiber in combination with capillary GC–MS was utilized as monitoring technique for the collection and detection of the volatile compounds of Echinophoraplatyloba DC. Experimental parameters, including the sample weight, extraction temperature, extraction time and humidity effect, desorption time and desorption temperature were examined and optimized. Using HS-SPME followed by GC–MS, 53 compounds were separated and identified in Echinophoraplatyloba DC, which mainly included E-β ocimene (47.63%), R-D-decalactone (13.28%), α-pinene (7.43%) and nonane (6.71%). Compared with hydrodistillation (HD), HS-SPME, provides the advantages of a small amount of sample, timesaving, simplicityand cheapness. To the best of...
Source: Analytica Chimica Acta, In Press, Accepted Manuscript, Available online 2 June 2011
Mohammad, BagherGholivand , MarziehPiryaei , Mir Mahdi, Abolghasemi
Headspace solid phase microextraction using anodized aluminum fiber in combination with capillary GC–MS was utilized as monitoring technique for the collection and detection of the volatile compounds of Echinophoraplatyloba DC. Experimental parameters, including the sample weight, extraction temperature, extraction time and humidity effect, desorption time and desorption temperature were examined and optimized. Using HS-SPME followed by GC–MS, 53 compounds were separated and identified in Echinophoraplatyloba DC, which mainly included E-β ocimene (47.63%), R-D-decalactone (13.28%), α-pinene (7.43%) and nonane (6.71%). Compared with hydrodistillation (HD), HS-SPME, provides the advantages of a small amount of sample, timesaving, simplicityand cheapness. To the best of...
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