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...

a simple and sensitive extractive- spectrophotometric method for thedeterrnination of trace amounts of vanadium(v) is reported. the method is based on the quantitative extraction of the anion complex of v(v) with 4-(2-pyridy1azo)-resorcinol with tetrabutylammonium perchlorate into chloroform, followed by spectrophotometric measurements at 554 nm. beer's law is obeyed over the concentration...

The spectrophotometric method described is quick and effective and a reliable alternative to a titrimetric method for measuring trypsin activity in duodenal juice.

The review is devoted for the solid phase extraction and the extractive spectrophotometric methods for the determination of some psychotropic drugs, e.g. phenothiazines, thioxanthenes, dibenzothiazines, fluoxetine, fluvoxamine, trazodone.

The spectrophotometric methods of determination the active pharmaceutical ingredients meloxicam and nimesulide were reviewed a simple UV-spectrophotometric method for these in industrial equipment cleaning validation samples was proposed. based on extraction residual quantities from manufacturing surface by concentrated sodium carbonate solution subsequent basic forms drugs at wavelength 362 nm...

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...

in the present study, a simple and sensitive extractive spectrophotometric method is described for determination of buspirone. the method is based on the reaction of buspirone and bromocresol green. the ion-pair complex was quantitatively extracted into chloroform at ph 2.3 followed by spectrophotometric determination at 415 nm. the complex was stable up to 2 days and obeyed beer's law over the...

Articles about the development of derivative spectrophotometric methods and analytical applications of derivative spectrophotometry (DS) published in the last nine years (since 1994) are reviewed.

The paper presents the using of amperometric sensors in measurements of the oxygen content in the organic solutions such as beer. The resulted data compared with spectrophotometric data.

BACKGROUND The spectrophotometer is well known to be a useful tool for estimating the objective minimal erythema dose (MED) during planning of phototherapy protocol. However, only a few spectrophotometric values are used to evaluate the erythema and pigmentation of the MED site during phototesting. OBJECTIVE To determinea new meaning of the relationships among spectrophotometric values during...