scholarly journals Benzene Monitoring and S-Phenylmercapturic Acid Determination of Workers at Oil Sites in Congo-Brazzaville

2021 ◽  
Vol 09 (03) ◽  
pp. 127-138
Author(s):  
Ebenguela Ataboho Ebatetou ◽  
Josué Richard Ntsimba Nsemi ◽  
Donatien Moukassa
Keyword(s):  
Congo Brazzaville ◽  
Acid Determination

scholarly journals Determination of free amino acids in plants by liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS)

2015 ◽  
Vol 7 (18) ◽  
pp. 7574-7581 ◽  
Author(s):  
Magdalena M. Dziągwa-Becker ◽  
Jose M. Marin Ramos ◽  
Jakub K. Topolski ◽  
Wiesław A. Oleszek
Keyword(s):  
Mass Spectrometry ◽  
Amino Acids ◽  
Liquid Chromatography ◽  
Amino Acid ◽  
Tandem Mass Spectrometry ◽  
Free Amino ◽  
Tandem Mass ◽  
Amino Acid Determination ◽  
Acid Determination

Free amino acid determination in plants by LC-MS/MS.

scholarly journals Determination of 3,4,5-Trihydroxybenzoic Acid Exploiting a Visible-Light-Driven Photoelectrochemical Platform: Application in Wine and Tea Samples

2022 ◽  
Author(s):  
Kayni Lima ◽  
Ridvan Fernandes ◽  
Clenilton dos Santos ◽  
Flavio Damos ◽  
Rita de Cássia Luz
Keyword(s):  
Light Emitting Diode ◽  
Glass Slide ◽  
Experimental Conditions ◽  
Amperometric Determination ◽  
Light Emitting ◽  
Promising Tool ◽  
Visible Light Driven ◽  
Photoelectrochemical Method ◽  
Acid Determination

The present work is based on the development and application of a photoelectrochemical method for the amperometric determination of 3,4,5-trihydroxybenzoic acid in different samples. The method is based on the use of a photoelectrochemical platform based on a glass slide coated with fluorine-doped tin oxide, which has been modified with cadmium sulfide and poly(D-glucosamine) and subjected to a light-emitting diode (LED) lamp. The photoelectrochemical platform was sensitive to the increase of the concentration of the antioxidant 3,4,5-trihydroxybenzoic acid in the solution. Under the optimized experimental conditions, the photoelectrochemical method presented a linear response for a 3,4,5-trihydroxybenzoic acid concentration ranging from 0.2 up to 500 μmol L-1. The method was applied to 3,4,5-trihydroxybenzoic acid determination in samples of wines and teas with recoveries between 95.88 and 101.72%. The results obtained suggest that the developed platform is a promising tool for quantifying the 3,4,5-trihydroxybenzoic acid.

Precipitation of αl-glutamic acid: determination of growth kinetics

2007 ◽  
Vol 136 ◽  
pp. 247 ◽  
Author(s):  
Jochen Schöll ◽  
Christian Lindenberg ◽  
Lars Vicum ◽  
Jörg Brozio ◽  
Marco Mazzotti
Keyword(s):  
Glutamic Acid ◽  
Growth Kinetics ◽  
Acid Determination

Improved automated kinetic determination of uric acid in serum by use of uricase/catalase/aldehyde dehydrogenase.

1979 ◽  
Vol 25 (4) ◽  
pp. 619-621 ◽  
Author(s):  
K Bartl ◽  
M Brandhuber ◽  
J Ziegenhorn
Keyword(s):  
Uric Acid ◽  
Aldehyde Dehydrogenase ◽  
Alcohol Dehydrogenase Isoenzymes ◽  
Kinetic Determination ◽  
Enzymatic Determination ◽  
Other Substances ◽  
Inhibitor System ◽  
Uric Acid Determination ◽  
Acid Determination

Abstract The enzymatic determination of serum uric acid by use of uricase, catalase, and aldehyde dehydrogenase according to Haeckel [J. Clin. Chem. Clin Biochem. 14, 101 (1976)] showed interferences from ethanol-converting enzymes, which are present in some patients' sera. We have identified these enzymes as alcohol dehydrogenase isoenzymes. Among other substances, a mixture of pyrazole and oxalate can be used to eliminate these interferences. This inhibitor system gives good results when used in the automated kinetic uric acid determination, as is shown by a comparison with the manual assay for uric acid according to Kageyama [Clin. Chim. Acta 31, 421 (1971)].

Comparison of anaerobic digesters performance treating palmitic, stearic and oleic acid: determination of the LCFA kinetic constants using ADM1

2020 ◽  
Vol 43 (7) ◽  
pp. 1329-1338 ◽  
Author(s):  
Alexandros Eftaxias ◽  
Vasileios Diamantis ◽  
Christos Michailidis ◽  
Katerina Stamatelatou ◽  
Alexandros Aivasidis
Keyword(s):  
Oleic Acid ◽  
Kinetic Constants ◽  
Anaerobic Digesters ◽  
Acid Determination

scholarly journals Paper-based platforms with coulometric readout for ascorbic acid determination in fruit juices

The Analyst ◽  
2020 ◽  
Vol 145 (9) ◽  
pp. 3431-3439
Author(s):  
Estefanía Nunez-Bajo ◽  
M. Teresa Fernández-Abedul
Keyword(s):  
Ascorbic Acid ◽  
Low Cost ◽  
Fruit Juices ◽  
Ascorbic Acid Determination ◽  
Cost Determination ◽  
Acid Determination

Paper-based electrochemical platforms with coulometric readout are employed for fast and low cost determination of ascorbic acid in commercial juice samples.

scholarly journals SQUARE-WAVE VOLTAMMETRIC METHOD FOR DETERMINATION OF FUMARIC AND MALEIC ACID—DETERMINATION OF FUMARIC ACID IN WINE

2001 ◽  
Vol 34 (10) ◽  
pp. 1719-1731 ◽  
Author(s):  
Rubin Gulaboski ◽  
Ilinka Spirevska ◽  
Lidija Šoptrajanova ◽  
Renata Slavevska
Keyword(s):  
Fumaric Acid ◽  
Maleic Acid ◽  
Voltammetric Method ◽  
Square Wave ◽  
Acid Determination

Spectrofluorimetric determination of uric acid based on its activation of catalytic oxidation of pyronine Y

2008 ◽  
Vol 62 (3) ◽  
Author(s):  
Suling Feng ◽  
Xueping Liu
Keyword(s):  
Uric Acid ◽  
Buffer Solution ◽  
Activation Effect ◽  
Buffer Solutions ◽  
Spectrofluorimetric Method ◽  
Spectrofluorimetric Determination ◽  
Uric Acid Determination ◽  
Catalyzed Oxidation ◽  
Acid Determination

AbstractA novel kinetic spectrofluorimetric method for the determination of uric acid based on the activation effect of uric acid on the Cu(II) ion catalyzed oxidation of pyronine Y by hydrogen peroxide was developed. The influence of different buffer solutions was tested and the Britton-Robinson buffer solution with pH 2.2 was found to be the optimum. The detection limit and the linear range for uric acid are 0.09 μg mL−1 and 0.3–3.0 μg mL−1, respectively. The RSD for eleven determinations of 1.6 μg mL−1 uric acid was 1.6 %. Satisfactory results were obtained when using this method of uric acid determination in human urine.

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