Please use this identifier to cite or link to this item:
|Type:||Artigo de periódico|
|Title:||Construction and evaluation of an ammonium tubular ion-selective electrode with ionophore nonactin.|
|Abstract:||This paper describes the construction of an ammonium tubular potentiometric detector for flow injection analisys (FIA) in which the high molecular weight polyvinyl chloride (PVC) membrane is applied directly on a conducting support consisting of a mixture of an epoxy resin and graphite. The tubular ammonium ion-selective electrode, without internal reference solution, is based on nonactin as the ionophore and bis-(2-ethylhexyl)-adipate as plasticiser solvent, supported upon a PVC membrane, The electrode exhibited a response of 55.6 mV per concentration decade within the 5.0x10(-5) to 1.0x10(-1) mol/L NH4+ range in TRIS-HCl 0.2 mol/L (pH=6.7) buffer. Potassium ions constituted the greatest analytical interference; the electrode response time was 10 seconds, at 25.0 degrees C.|
|Editor:||Soc Brasileira Quimica|
|Citation:||Quimica Nova. Soc Brasileira Quimica, v. 19, n. 5, n. 549, n. 553, 1996.|
|Appears in Collections:||Unicamp - Artigos e Outros Documentos|
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.