Buscar
Mostrando ítems 21-30 de 1761
5th EspeQBrasil meeting discussed the prominent role of Chemical Speciation in Analytical Chemistry
(Visao Fokka Communication Agency, 2018-01-01)
RP-HPLC×HILIC chromatography for quantifying ertapenem sodium with a look at green chemistry
(2016-11-01)
Ertapenem sodium is a polar and ionizable compound; therefore, it has little retention on traditional C18 columns in reverse-phase high-performance liquid chromatography, even using a highly-aqueous mobile phase that can ...
Analytical chemistry in Brazil: healthy and growing
(Sociedade Brasileira de Química, 2009)
Chemical sciences in Brazil are growing fast and being one of the main supports for the continuous development of the country. Inspired on the 15th Brazilian Meeting on Analytical Chemistry, ENQA, with a record number of ...
Implementation and Validation of an Analytical Method for Lincomycin Determination in Feathers and Edible Tissues of Broiler Chickens by Liquid Chromatography Tandem Mass Spectrometry
(Hindawi Limited, 2019)
Recent studies have detected different antimicrobial residues in broiler chicken feathers, where they persisted for longer periods of time and at greater concentrations than in edible tissues. However, until today, lincomycin ...
Application of a microplate-based orac-pyrogallol red assay for the estimation of antioxidant capacity: First action 2012.03
(AOAC International, 2012)
The method was approved by the Expert Review Panel on Strategic Foods Analytical Methods as First Action. See "Standards News," (2012) Inside Laboratory Management, March/April issue. The AOAC Stakeholder Panel on Strategic ...
Química Analítica de ProcessosProcess Analytical Chemistry
(Sociedade Brasileira de Química, 2006)
Absolute configuration of the meroditerpenoids taondiol and epitaondiol diacetates by vibrational circular dichroism
(2012)
The absolute configuration of alga meroditerpenoids (-)-taondiol diacetate (1b) and (+)-epitaondiol diacetate (2c) are assigned by vibrational circular dichroism (VCD). The spectra of (2S,3S,6R,7R,10R,11R,14S)-1b and ...
Analytical chemistry in a liquid film/droplet
(1995-12-01)
The measurement of nitrogen dioxide at the parts-perbillion level is described. The experimental arrangement consists of two optical fibers placed on opposite sides of and in contact with a liquid film (14-57 μL in volume) ...
Non-supervised pattern recognition methods: Exploring chemometrical procedures for evaluating analytical data
(Soc Brasileira QuimicaSao PauloBrasil, 2007)
An HPLC method for determination of azadirachtin residues in bovine muscle
(Oxford University Press, 2011)
A high-performance liquid chromatography (HPLC) method for the determination of azadirachtin (A and B) residues in bovine muscle has been developed. Azadirachtin is a neutral triterpene and chemotherapeutic agent effective ...