NDLI: Amperometric titration of metal ions with edta. the analytical application of the oxide electrode

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Amperometric titration of metal ions with edta. the analytical application of the oxide electrode

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sontag, G. Kainz, G.
Organization	The National Aeronautics and Space Administration (NASA)
Copyright Year	1974
Abstract	IN THE AMPEROMETRIC TITRATION OF METAL IONS WITH ETHYLENEDIAMINETETRAACETIC ACID (EDTA), AN OXIDE ELECTRODE IS EMPLOYED (A PLATINUM ELECTRODE COATED WITH AN OXIDE LAYER. THESE ELECTRODES ARE ACTIVE AND STABLE OVER A RELATIVELY WIDE RANGE OF PH AND WILL REACT TO AN EXCESS OF EDTA (AFTER THE EQUIVALENCE POINT). THE PROCEDURES ARE SPECIFIED: (1) FOR DETERMINING INDIVIDUAL METAL IONS, AND (2) FOR DETERMINING 2 IONS WHEN PRESENT TOGETHER. IN CASE (2) THE PRINCIPLE THAT THE STABILITY OF METAL-EDTA COMPLEXES IS A FUNCTION OF THE PH OF THE SOLUTION IS APPLIED. FIRST A PH IS CHOSEN SUCH THAT ONLY ONE ION FORMS A STABLE COMPLEX (STABILITY CONSTANT GREATER THAN 10 TO THE 7TH POWER). THIS ION CAN THEN BE TITRATED WITH EDTA WITHOUT INTERFERENCE FROM THE OTHER ION. NEXT THE PH IS ADJUSTED SO THAT THE 2ND ION ALSO FORMS A SUITABLY STABLE COMPLEX.
File Size	599587
File Format	PDF
Alternate Webpage(s)	http://www.archive.org/details/nasa_techdoc_19750004975
Archival Resource Key	ark:/13960/t0sq9m60q
Language	English
Publisher Date	1974-12-01
Access Restriction	Open
Subject Keyword	Dry Heat Temperature Effects Thermal Resistance Ionizing Radiation Microorganisms Planetary Quarantine Sterilization Effects Atmospheric Moisture Bacillus Radiant Flux Density Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text

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