Purity of potassium hydrogen phthalate, determination with precision coulometric and volumetric titration–A comparison

Autor:	Joachim Pautz, Martin Breitenbach, Sebastian Recknagel, Detlef Lück
Rok vydání:	2007
Předmět:	Hydrogen Chemistry Potassium hydrogen phthalate Potassium Single measurement Analytical chemistry chemistry.chemical_element Biochemistry Analytical Chemistry Coulometry chemistry.chemical_compound Certified reference materials Environmental Chemistry Titration Mass fraction Spectroscopy
Zdroj:	Analytica Chimica Acta. 599:256-263
ISSN:	0003-2670
DOI:	10.1016/j.aca.2007.07.062
Popis:	The mass fraction of potassium hydrogen phthalate (KHP) from a specific batch was certified as an acidimetric standard. Two different analytical methods on a metrological level were used to carry out certification analysis: precision constant current coulometric and volumetric titration with NaOH. It could be shown that with a commercial automatic titration system in combination with a reliable software for the end-point detection it is possible to produce equivalent results with the same accuracy in comparison to a definite method handled by a fundamental apparatus for traceable precision coulometry. Prerequisite for titrations are that a high number of single measurement are applied which are calibrated with a high precision certified reference material.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b69f41f5d5885012aab8b16cacb0e0f2 https://doi.org/10.1016/j.aca.2007.07.062 Zobrazit plný text záznamu Full Text from ScienceDirect