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01 June 2011, 21:45:49
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Quoc Tuc, Dinh , Fabrice, Alliot , Elodie, Moreau-Guigon , Joëlle, Eurin , Marc, Chevreuil , ...
This study presents the development of an automated on-line solid phase extraction (SPE)-liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of 23 antibiotics in environmental water samples. After optimisation of LC-MS/MS conditions, SPE parameters such as sorbent type, sample pH or sample volume were optimised. Antibiotic recoveries ranged from 64% to 98% and compared favourably with those achieved using off-line SPE. Limits of detection were in the range 0.5-13.7ngL−1.This on-line SPE-LC-MS/MS procedure was applied to the analysis of water samples taken in three rivers within the Seine River basin, near Paris (France). The obtained results revealed the occurrence of...
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Quoc Tuc, Dinh , Fabrice, Alliot , Elodie, Moreau-Guigon , Joëlle, Eurin , Marc, Chevreuil , ...
This study presents the development of an automated on-line solid phase extraction (SPE)-liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the determination of 23 antibiotics in environmental water samples. After optimisation of LC-MS/MS conditions, SPE parameters such as sorbent type, sample pH or sample volume were optimised. Antibiotic recoveries ranged from 64% to 98% and compared favourably with those achieved using off-line SPE. Limits of detection were in the range 0.5-13.7ngL−1.This on-line SPE-LC-MS/MS procedure was applied to the analysis of water samples taken in three rivers within the Seine River basin, near Paris (France). The obtained results revealed the occurrence of...
In situ copper oxide modified molecularly imprinted polypyrrole film based voltammetric sensor for selective recognition of tyrosine
01 June 2011, 21:45:49
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Varghese, Saumya , Krishnapillai P., Prathish , Talasila P., Rao
Organic-inorganic hybrids are promising functional materials as they combine the special characteristics of both organic (polymer) and inorganic phases. Among different existing approaches for the preparation of such polymer-inorganic hybrid coatings, in situ electrochemical methods are very advantageous because of their high sensitivity and simplicity. In the present study, voltammetric sensors for tyrosine are designed and developed via various modifications on glassy carbon electrode such as polypyrrole coated GCE, molecularly imprinted polypyrrole coated GCE (MIPPy) and in situ copper oxide modified MIPPy coated GCE. Of these, in situ copper oxide modified MIPPy coated GCE sensor responds to tyrosine concentrations in...
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Varghese, Saumya , Krishnapillai P., Prathish , Talasila P., Rao
Organic-inorganic hybrids are promising functional materials as they combine the special characteristics of both organic (polymer) and inorganic phases. Among different existing approaches for the preparation of such polymer-inorganic hybrid coatings, in situ electrochemical methods are very advantageous because of their high sensitivity and simplicity. In the present study, voltammetric sensors for tyrosine are designed and developed via various modifications on glassy carbon electrode such as polypyrrole coated GCE, molecularly imprinted polypyrrole coated GCE (MIPPy) and in situ copper oxide modified MIPPy coated GCE. Of these, in situ copper oxide modified MIPPy coated GCE sensor responds to tyrosine concentrations in...
Use of ionic liquid aggregates of 1-hexadecyl-3-butyl imidazolium bromide in a focused-microwave assisted extraction method followed by high-performance liquid chromatography with ultraviolet and fluorescence detection to determine the 15+1EU priority PAHs in toasted cereals (“gofios”)
01 June 2011, 21:45:49
Publication year: 2011
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Monica, German-Hernandez , Veronica, Pino , Jared L., Anderson , M., Afonso
A focused-microwave assisted extraction using aggregates of the ionic liquid (IL) 1-hexadecyl-3-butylimidazolium bromide (HDBIm-Br) followed by high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection and single-channel fluorescence detection (FLD) has been developed for the determination of polycyclic aromatic hydrocarbons (PAHs) in toasted cereals (“gofios”) of different nature (wheat, barley, rye, and maize corn) of the Canary Islands, Spain. The optimized HPLC-UV-Vis/single-channel FLD method takes 40minutes for the chromatographic run with limits of detection varying between 0.02 to 4.01ng·mL−1 for the fluorescent PAHs from the European Union (EU) priority list in foods, and 20.5ng·mL−1 for the non-fluorescent PAH cyclopenta[c,d]pyrene (CPP). The...
Source: Talanta, In Press, Accepted Manuscript, Available online 31 May 2011
Monica, German-Hernandez , Veronica, Pino , Jared L., Anderson , M., Afonso
A focused-microwave assisted extraction using aggregates of the ionic liquid (IL) 1-hexadecyl-3-butylimidazolium bromide (HDBIm-Br) followed by high-performance liquid chromatography (HPLC) with ultraviolet (UV) detection and single-channel fluorescence detection (FLD) has been developed for the determination of polycyclic aromatic hydrocarbons (PAHs) in toasted cereals (“gofios”) of different nature (wheat, barley, rye, and maize corn) of the Canary Islands, Spain. The optimized HPLC-UV-Vis/single-channel FLD method takes 40minutes for the chromatographic run with limits of detection varying between 0.02 to 4.01ng·mL−1 for the fluorescent PAHs from the European Union (EU) priority list in foods, and 20.5ng·mL−1 for the non-fluorescent PAH cyclopenta[c,d]pyrene (CPP). The...
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