Optimization of a sample subtraction procedure: potentiometric analysis of bases

✍ Scribed by Carlo Maccà; Andrea Tapparo

• Book ID: 102982846
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 952 KB
• Volume: 273
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)80196-r

✦ Synopsis

A previously proposed vanation of the pnnclple of potentlometnc sample subtraction was theoretically and emenmentally evaluated usmg acid-base reactions as model systems The potential of a glass electrode was measured a& ad&tton of two measured ahquots of a standard acid, followed by "subtractlon" of a measured volume of sample base Cntena for optlmlzatlon of the procedure are discussed If the ratio between the second and the first addition of standard IS large enough ( & 5 1) and the analyte m the added sample consumes a major part of the standard reagent (80% or more), very good accuracy and preaslon, approaching those of tltratlon, can be attamed The theoretlcal predxt:ons were confirmed by expenments Keyword Optlmlzatlon methods, Potentlometry, Acl&metry, Sample subtraction