Development of a Flow Injection System with Two Analytical Paths for Ammonium Determination in Soil Extracts by Conductometry
نویسندگان
چکیده
Um sistema de análise química em fluxo com dois percursos analíticos foi desenvolvido para determinação de amônio em extratos de solo por condutometria. A amônia era gerada em linha em um meio alcalino, permeava através de uma membrana hidrofóbica (TPFE), sendo coletada em fluxo de água desionizada que transportava o analito para a cela de condutividade. O módulo de análise compreendia dois percursos analíticos independentes, para aumentar a frequência de amostragem. O sistema foi utilizado para determinar amônia em extratos de solos em KCl 2 mol L. Apresentou uma produtividade analítica de 100 determinações por hora, desvio padrão relativo de 2% e recuperação de 99,9%.
منابع مشابه
Ultra-trace Determination of Palladium(II) by Spectrophotometric Flow Injection Analysis
Nowadays, palladium compounds due to their especial characteristics used in different industries, mainly in electrical power sources and chemical productions as a catalyst. Therefore, Pd concentration is increasing in our around that can be contaminant our environment due its toxic effects. In this work, a simple, selective and rapid flow injection method of analysis (FIA) has been developed fo...
متن کاملDevelopment and Validation of an Ion Chromatography Method for Quantification of Ammonium Ions in STEALTH® Liposomes
Ammonium sulfate is one of the subsidiary components in the stealth liposome structure. The ratio of ammonium ion bound to liposome sphere to ammonium ions outside the liposome plays an important role in drug delivery formulation; accordingly, in order to quantify the ammonium ion in the liposome structure, a rapid and sensitive method was validated using a conductivity detector. Through this m...
متن کاملSpectrophotometric simultaneous determination of nitrite, nitrate and ammonium in soils by flow injection analysis.
A new rapid flow injection procedure for the simultaneous determination of nitrate, nitrite and ammonium in single flow injection analysis system is proposed. The procedure combines on-line reduction of nitrate to nitrite and oxidation of ammonium to nitrite with spectrophotometric detection of nitrite by using the Griess-Ilosvay reaction. The formed azo dye was measured at 543 nm. The influenc...
متن کاملSensitivity improvement of ammonia determination based on flow-injection indophenol spectrophotometry with manganese(II) ion as a catalyst and analysis of exhaust gas of thermal power plant.
The sensitivity improvement of a flow-injection spectrophotometric method for the determination of ammonia was examined based on an indophenol blue coloration reaction with salicylate and hypochlorite in the presence of manganese(II) as a reaction promotion catalyst. The optimal conditions for achieving higher sensitivity of ammonia determination were examined using a three-line flow system. Th...
متن کاملFlow Injection System with Potentiometric Detection for the Determination of Urea Content in Milks
Two variant manifolds of a flow injection analysis (FIA) system are described for the determination of urea content in milks. This determination consists of the enzymatic reaction of urea with urease in which ammonium ion is formed. Ammonium is converted to ammonia by adding a NaOH solution and then led to a gas diffusion unit in which it diffuses to an acceptor channel (Tris/HCl, pH 7.5). Here...
متن کامل