Spectrophotometric determination of nicotine with ion association reagents

EXTRACTIVE-SPECTROPHOTOMETRIC DETERMINATION OF VANADIUM(V) AS AN ION-ASSOCIATION COMPLEX WITH 4-(2-PYRIDYLAZ0)-RESORCINOALN D TETRABUTYLAMMONIUM PERCHLORATE

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 ...

A new spectrophotometric method for the determination of tianeptine in tablets using ion-pair reagents.

A new rapid and sensitive procedure assay is proposed for the spectrophotometric determination of tianeptine. The developed method involves formation of colored chloroform extractable ion-pair complexes of tianeptine with bromophenol blue (BPB), bromocresol green (BCG), bromothymol blue (BTB) and methyl orange (MO) in acidic medium. Beer's law is obeyed in the concentration ranges 3.0-12.0, 4.0...

Spectrophotometric Determination of Esmolol Hydrochloride Using Analytical Reagents

In the present study, four simple, rapid, and sensitive charge-transfer spectrophotometric methods were developed for the determination of esmolol hydrochloride (ESM). 2,3-Dichloro-5, 6-dicyano-1, 4-benzoquinone, 1-chloro 2,4-dinitro benzene, 2,5-dichloro-3,6-dihydroxycyclohexa-2,5-diene-1,4-dione (chloranilic acid), and sodium 3,4-dioxo-3,4-dihydronaphthalene-1-sulfonate (Folin’s reagent) were...

New Reagents for the Spectrophotometric Determination of Hypochlorite

New Reagents for the Spectrophotometric Determination of Nitrite and Nitrate