This paper reviewed different analytical techniques to determine concentrations of the environmentally-friendly oxidant ferrate(VI) (Fe(VI)O(2-)(4), Fe(VI)) anion in solid and solution samples. The techniques included volumetric (chromite and arsenite), electrochemical (cyclic voltammetry and potentiometry), and spectrophotometric methods (Fourier transform infrared, Mossbauer, UV-Visible, 2,2-...

determined by six different analytical methods, i.e., the glucose-oxidase method (G), the autoanalyser method with Hoffman's method (A), the Somogyi-Nelson method (S), the o-toluidine method (T), the Momose's method (M) and the Hage dorn-Jensen method (H). The values determined by micromethods of HagedornJensen, of Momose and of Somogyi-Nelson are usually higher, and the values obtained by o-to...

We present for the #rst time an analytical approach for determining the time of #ring of nonlinear stochastic neuronal models. The theory of Markov processes is applied to the Fitzhugh–Nagumo system with a constant mean, Gaussian white noise input, representing stochastic excitation and inhibition. An equation obtained for the mean of the time to #rst spike is solved by means of an accurate one...

This review article summarized the analytical methods for the quantitative determinations of H2 receptor antagonist famotidine by spectral methods, electrochemical procedures (potentiometric titration, polarography, diferential pulse voltammetry) as well as separation procedures such as high-performance liquid chromatography (HPLC), thin layer chromatography (HPTLC) and capillary electrophoresi...

Spectrophotometric determination of protein concentrations is an important analytical tool for nearly all phases of protein drug development and manufacturing. Determinations of absorptivities (A0.1%) and molar extinction coefficients (ε) for protein solutions require at least one initial, accurate measurement of protein concentration. Traditionally, this crucial concentration has been determin...

Six drugs viz., Astemizole, Cisapride, Domperidone, Pantoprazole, Rabeprazole and Trazadone were tested for the formation of charge transfer complexes with Iodine. Each of these drugs turned the violet coloured i.e iodine , in CH2Cl2, to brown and exhibited a new band at 366nm in addition to the original band of iodine at 510nm due to anion of the reagent whose intensity increased with increase...

寺 田喜久雄,西 村 かず よ,木 羽敏泰:金 沢大学理学部化学教室,金 沢市丸 の内1-1〒920 A simple and effective method for determining 106Ru in sea water is presented. After the sea water is heated with oxidants (potassium peroxodisulfate and potassium periodate) in potassium hy droxide solution, ruthenium tetraoxide is extracted into carbon tetrachloride from the aqueous solution adjusted to pH 4-6, and then back-extracted with a ...

We performed an analytical evaluation of a commercially available instrument for determining ionized magnesium through use of a neutral carrier, liquid-membrane-based ion-selective electrode. Reproducibility (CV 2-4%), linearity (0.30-2.50 mmol/L), lower limit of detection (0.30 mmol/L), and absence of interference from Ca2+ indicate adequate performance for measuring ionized magnesium in plasm...

In recent years, the analytical determination of coenzyme Q10 (CoQ10) has gained importance in clinical diagnosis and in pharmaceutical quality control. CoQ10 is an important cofactor in the mitochondrial respiratory chain and a potent endogenous antioxidant. CoQ10 deficiency is often associated with numerous diseases and patients with these conditions may benefit from administration of supplem...

This report presents a general analysis for the performance of WLAN location determination systems. In particular, we present an analytical method for calculating the average distance error and probability of error of WLAN location determination systems. These expressions are obtained with no assumptions regarding the distribution of signal strength or the probability of the user being at a spe...