Conductometric Titration
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. DETERMINAÇÃO CONDUTOMÉTRICA DE CLORIDRATO DE TETRACICLINA EM FORMULAÇÕES FARMACÊUTICAS
In the present article it is described, a simple, precise, rapid and low-cost conductometric titration of tetracycline hydrochloride in pharmaceutical formulations using silver nitrate as titrant. The method is based on the precipitation of chloride ions derived from tetracycline hydrochloride with silver ions, yielding silver chloride precipitate and the co
Quím. Nova. Publicado em: 2017-09
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2. Cloreto de n-(2-hidroxil) propil-3-trimetil amônio quitosana como adsorvente de corantes reativos em solução aquosa
The quaternary chitosan was synthesized by reaction of chitosan with glycidyl trimethylammonium chloride. it was characterized by infrared spectra and conductometric titration. Adsorption of reactive blue 4 (RB4) and reactive red 120 (RR120) by quaternary chitosan was studied from aqueous medium. Two kinetic adsorption models were tested: pseudo first-order
Química Nova. Publicado em: 2010
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3. Determinação condutométrica de cloridrato de metformina em formulações farmacêuticas empregando nitrato de prata como titulante
A simple, precise, rapid and low-cost conductometric titration method for the determination of metformin hydrochloride (MET) in pharmaceuticals using silver nitrate as titrant is proposed. The method was based on the chemical reaction between the chloride of metformin hydrochloride molecule and Ag(I) ions, yielding the precipitate AgCl(s). The method was app
Química Nova. Publicado em: 2009
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4. Aperfeiçoamento de métodos para a determinação de componentes ácidos e básicos em amostras de água de chuva / Enhancement of methods for the determination of acid and alkaline compounds in rainwater samples
O estudo da variação da composição atmosférica contribui para a compreensão dos efeitos das emissões antrópicas sobre a troposfera. A análise química da água de chuva assume importância neste contexto, uma vez que a precipitação úmida constitui um excelente meio de remoção de muitos poluentes da atmosfera. O aumento de acidez das chuvas, em
Publicado em: 2005
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5. Studies on formation of chromium niobates
The precise nature of the reaction between chromium chloride and potassium niobate at specific pH levels 12.0, 10.8 and 7.6 has been studied by means of electrometric techniques involving pH and conductometric titrations. The well defined breaks and inflections in the titration curves provide cogent evidence for the formation and precipitation of chromium or
Química Nova. Publicado em: 2000-12
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6. Electrorotation of colloidal particles and cells depends on surface charge.
The importance of surface conductivity to the frequency-dependent polarizability and the rotation of particles in circular electric fields (electrorotation) is emphasized by various theoretical and experimental investigations. Although surface conductivity seems to be naturally related to the ionic double layer, there is rare experimental evidence of a direc