scholarly journals Studies on a Pb2+ - selective electrode with a macrocyclic liquid membrane: Potentiometric determination of pb2+ ions

2006 ◽  
Vol 71 (12) ◽  
pp. 1345-1352 ◽  
Author(s):  
Marian Isvoranu ◽  
Constantin Luca ◽  
Maria Pleniceanu ◽  
Cezar Spinu
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Liquid Membrane ◽  
Theoretical Data ◽  
Absorption Spectrometry ◽  
Systematic Errors ◽  
Ion Selective Electrode ◽  
Selective Electrode ◽  
Active Complex ◽  
Direct Potentiometry

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 successful 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. .

Determination of Sodium in Alkali-Treated Cereal Straws, Lye-Peel Wastes, and Brine-Frozen Foods with an Ion Selective Electrode Compared with Atomic Absorption Spectrometry

1976 ◽  
Vol 59 (4) ◽  
pp. 761-765 ◽  
Author(s):  
Geraldine E Secor ◽  
Gary M McDonald ◽  
Rolland M McCready
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Rice Straw ◽  
Simple Procedure ◽  
Absorption Spectrometry ◽  
Sodium Ion ◽  
Ion Selective Electrode ◽  
Frozen Foods ◽  
Selective Electrode

Abstract A simple procedure is described for determining sodium in sodium hydroxide-treated rice straw and rye grass, lye-peeled potato wastes, and brine-frozen vegetables. Samples containing ≤4% sodium were extracted with 0.05M ammonium carbonate and the extracts were analyzed directly by using a sodium ion selective electrode over the range 10−4 to 10−2M sodium ion. Comparable analyses of the same extracts by atomic absorption spectrometry agreed to within 10%. Recovery of sodium added to control rice straw was 102%.

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