Spectrophotometric determination of Ru(III) using rhodanine

1019-1020A simple and direct spectrophotometric method using 2-thion-thiazolid-4-one has been developed for determination of Ru (III).Molar absorptivity and Sandell' s sensitivity are calculated to be 6.5555×103 L mol-1 cm-1 and 0.0154 μg cm-2 respectively. The effect of various parameters including time, pH and volume of reagent has been studied. The Beer's law is obeyed over the range 0.202-6.873 μg of Ru(III). The method has been applied for the determination of Ru(III) in various synthetic and real samples

Stuides on a Pb2+-selective electrode with a macrocyclic liquid membrane. Potentiometric determination of Pb2+ ions

This paper presents experimental and theoretical data regarding the design, characterization and analytical applications of a non-expensive, liquid-membrane ion-selective electrode for Pb2+ ions. The membrane is a solution of the active complex formed by Pb2+ ions with dibenzo-18-crown-6-ionophore (DB-[18]-C-6) extracted in propylene carbonate (PC). The sucessful application of the developed electrode for the determination of Pb2+ ions in aqueos solution samples by direct potentiometry and potentiometric titration is presented. For the presented analytical results, there are insignificant systematic errors between the direct potentiometric method with the developed ion-selective electrode and atomic absorption spectrometry

Spectrophotometric study of binary system Bi(III)-solochrom violet RS and determination of Bi(III)

1101-1102A simple and direct spectrophotometric method using solochrom violet RS has been developed for determination ofBi(III). The molar absorbtivity and the sandell's sensitivity are calculated to be 1.5 x 104 1-mol-1 cm-1 and 0.0114 mg-cm-2 respectively. The effect of various parameters including time. pH and added reactant volume have been studied. The Beer's law is obeyed over the range 0.42-7.52 mg /ml of Bi(lII). The method has been applied for the determination of Bi(III) in various alloys and salt-water samples

<b>Potentiometric determination of K⁺ ions using a K⁺-selective electrode with macrocyclic liquid membrane</b>

This paper describes analytical applications of K+-selective liquid membrane electrode. Themembrane is the solution of the active complex formed by the K+ ions with dibenzo-18-crown-6 ionophore (DB-[18]-C-6) extracted in propylenecarbonate (PC). Successful application of the developed electrode for K+ ions determination in aqueous solution and samples of commercial mineral water by direct potentiometry is presented