نتایج جستجو برای: spectrophotometric method

تعداد نتایج: 1637699  

Journal: :journal of sciences islamic republic of iran 0

a simple and sensitive extraction-spectrophotometric method for rapid and accurate determination of benzocaine in pure and dosage forms was developed. benzocaine was effectively extracted as a 1:1 ion pair complex with dicyclohexyl-18-crown-6 and calmagite in acidic media into chloroform, followed by spectrophotometric determination at 486 nm. molar absorptivity of the ternary complex at this w...

Journal: :Guang pu xue yu guang pu fen xi = Guang pu 2015
Nesrine T Lamie

A simple, specific, accurate and precise spectrophotometric stability indicating method is developed for determination of itraconazole in the presence of its oxidative degradation product and in pharmaceutical formulations. A newly developed spectrophotometric method called ratio difference method by measuring the difference in amplitudes between 230 and 265 nm of ratio spectra. The calibration...

Journal: :International Journal of Research in Engineering and Innovation 2020

Journal: :Indian Journal of Pharmaceutical Sciences 2009

2004
Bettye Hollins Beverly Noe MIchael Henderson

With this fluorometric method for measuring indocyanine green (ICG) in biological fluids, the limit of detection is an order of magnitude lower than for the traditional spectrophotometric procedure. The excitation and emission maxima are 780 and 810 nm, respectively. Agreement was excellent (r = 0.998) between direct results by this method and those by a liquid-chromatographic procedure with sp...

Journal: :Clinical chemistry 1975
S W Kiang J W Kuan G G Guilbault

We describe an enzymatic fluorometric method for determining glucose concentrations in blood samples by analysis on a semi-solid surface (silicone-rubber pads). The method is an adaptation of existing spectrophotometric procedures based on the sequential coupling reactions with glucose-6-phosphate dehydrogenase and NADP+. The rate of appearance of NADPH fluorescence at 460 nm (excitation wavele...

2010
SUBHASH CHAUDHARY

This paper describes the Spectrophotometric and titrimetric methods for the determination of gentamycin and amoxycillin. The use of potassium iodate reagent for direct titrimetric method for the determination of some selected antibiotic has been described. The end point was characterized by a sharp change in color from colorless to deep red followed by spectrophotometric measurements.

Journal: :Clinical chemistry 1979
A D Fraser A L Lindsay

Hemoglobin interferes with determination of total bilirubin by the diazo procedure with the DuPont aca. We compared results by that procedure with those by a manual direct spectrophotometric two-wavelength method. Because the manual method was not inhibited by hemolysis as was the DuPont aca diazo procedure, we reprogrammed our DuPont aca to measure the absorbance of diluted serum samples at 45...

2010
Zenovia Moldovan Andrei A. Bunaciu Mohammed A. Al-Omar Hassan Y. Aboul-Enein

A rapid and sensitive spectrophotometric method for the determination of diosmin (D) has been developed. The method is based on the reaction of D with 4-aminoantipyrine (AAP) in the presence of hexacyanoferrate (III) (HCF) in an alkaline medium and subsequent formation of a purple coloured product having max at 524.5 nm. The conditions affecting the reaction (reagents concentration, pH, order o...

ژورنال: :international journal of new chemistry 0

abstract: spectrophotometric studies were successfully used in quantitative analysis of amitriptyline hydrochloride (ath) two new methods using spectrophotometry are described for the determination of (ath) with potassium bromate as the oxidizing agent and acid dyes, methyl orange and indigo carmine. both spectrophotometric methods are based on the oxidation of mentioned drugs by a known excess...

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