کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1169707 | 960647 | 2007 | 8 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Purity of potassium hydrogen phthalate, determination with precision coulometric and volumetric titration–A comparison Purity of potassium hydrogen phthalate, determination with precision coulometric and volumetric titration–A comparison](/preview/png/1169707.png)
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.
Journal: Analytica Chimica Acta - Volume 599, Issue 2, 19 September 2007, Pages 256–263