in this study a sensitive, simple and accurate spectrophotometric method was suggested for determination of tamsulosin in bulk powder and pharmaceutical dosage form based on the formation of an ion-pair complex between the drug and bromocresol green in a buffer solution at ph 3.5. the formed yellow color complex was extracted with chloroform and measured at 415 nm. the optimum reaction conditio...

a solid chelating material, 1-(2-pyridy1azo)-2-naphthol (pan) supported on naphthalene provides a rapid and highly selective means of preconcentration of uranium from aqueous solution. uranium is quantitatively retained on this adsorbent in the ph range 9.8-10.7 with a flow rate of 1 ml min . the metal complex was desorbed with 10 ml of 2 m hydrochloric acid and uranium is determined by differe...

Determination of the characteristics pH sensor using U-shaped optical fiber was carried out with various varieties, namely length without a coat, indentation diameter, and number imperfections. Optical as light transmission medium is used to detect level solution. The output read on OPM in form power. best characteristic obtained imperfections, imperfections 3 value range 32.0 µW, sensitivity 3...

An alpha Amyl Cinnamaldehyde Isonicotinoyl Hydrazone (ACINH) is newly synthesised novel chromogenic reagent, ACINH is used for the determination of Cd (II) by a spectrophotometric method. ACINH forms a yellow coloured water soluble [Cd (II)ACINH] complex with Cd (II) in the pH range 9.0. At λmax 380 nm the complexes shows maximum absorbance and at pH range 9.0. Hence further analytical studies ...

This study aims to investigate the nature and types of complexes formed in aqueous solution between 8Hydroxyquinoline (HQ) and the ions of Sc, Y, and La. Potentiometric titration was used to follow the formation of complexes. The coordination compounds formed were studied through the determination of stability constants of these complexes in aqueous solution at 25,0 ± 0,1oC and ionic strength o...

A method for the determination of ofloxacin (OFL) has been developed, based on the enhancement of resonance light scattering (RLS) of OFL in the presence of alizarin violet 3B (AV3B). Under the experimental conditions, the RLS intensity of AV3B was greatly enhanced by adding OFL. At pH 5.09, the enhancement of the RLS intensity at 439.5 nm was proportional to the concentration of OFL in the ran...

PURPOSE Cyclic voltammetry and differential pulse voltammetry were used to explore the diffusion behavior of two antipsychotic drugs at a glassy carbon electrode. A well-defined oxidation peak was obtained in Britton-Robinson (BR) buffer (pH 2.0). The response was evaluated as a function of some variables such as the scan rate, and pH. METHODS A simple, precise, inexpensive and sensitive volt...

Electrochemical method based on voltammetry using bare and single walled carbon nanotubes (SWNT) modified edge plane pyrolytic graphite electrode (EPPGE) is proposed for the simultaneous determination of adenosine and adenine in phosphate buffer medium of pH 7.2. The oxidation peak current of both the analytes increases significantly along with the negative shift of peak potentials using SWNT/E...

This paper describes an investigation of the conditions affecting the determination of phosphate using the reduced phosphoantimonylmolybdic acid method. The aim was to develop a determination method with faster kinetics than the original procedure of Murphy and Riley, for automation using flow-injection analysis. Optimum colour formation was found to occur at [H+ ] / [MOO:-] ratios between SW30...

A new ammonia optical sensor was designed using bis(acetylacetoneethylendiamine)tributylphosphin cobalt(III) tetraphenylborate complex, coated on transparent triacetylcellulose film as membrane. The change in the absorbance of the optode at the maximum wavelength of 408 nm was related to ammonia concentration in aqueous samples. A buffer solution with a pH of 9 (sodium borate-HCl) was used. The...