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Title:Validacija in izračun merilne negotovosti potenciometričnih postopkov določanja masnih deležev HCl in NaOH
Authors:ID Polajžer, Urška (Author)
ID Kolar, Mitja (Mentor) More about this mentor... New window
ID Brodnjak - Vončina, Darinka (Comentor)
Files:.pdf VS_Polajzer_Urska_2013.pdf (3,53 MB)
MD5: ED10B145443D29C0EFF6414A2B617F92
PID: 20.500.12556/dkum/7785a1bf-cbcf-4510-a191-a992abcb38d4
 
Language:Slovenian
Work type:Undergraduate thesis
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Namen diplomske naloge je bil validirati: metodo za določitev masnega deleža HCl v vzorcih klorovodikove kisline in metodo za določitev masnega deleža NaOH v vzorcih natrijevega hidroksida z uporabo avtomatskega titratorja in potenciometrično indikacijo končne točke. Pri postopku validacije smo preverili: linearnost, ponovljivost, obnovljivost, točnost in robustnost preskusnih metod. Po izbiri ustreznih validacijskih parametrov smo izvedli eksperimente in potrdili primernost metod za predvideno uporabo ter ovrednotili merilno negotovost rezultata določitev masnega deleža HCl in NaOH. Ugotovili smo, da je postopek določitve masnega deleža HCl in NaOH v vzorcih klorovodikove kisline in natrijevega hidroksida primeren za predvideno vsakodnevno in rutinsko uporabo. Z validacijo smo dokazali, da sta preskusni metodi natančni, točni, linearni in robustni. V sklepnem delu diplomske naloge smo indentificirali vse izvore merilne negotovosti in s pomočjo modelnih enačb izračunali razširejeno merilno negotovost.
Keywords:klorovodikova kislina, natrijev hidroksid, avtomatski titrator, potenciometrična titracija, končna točka, kombinirana steklena elektroda.
Place of publishing:Maribor
Publisher:[U. Polajžer]
Year of publishing:2013
PID:20.500.12556/DKUM-40656 New window
UDC:577.164.2:620.193.4(043.2)
COBISS.SI-ID:17476374 New window
NUK URN:URN:SI:UM:DK:KUZRQKYU
Publication date in DKUM:01.07.2013
Views:2361
Downloads:327
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Secondary language

Language:English
Title:Validation and calculation of measurement uncertainty potenciometric determination procedure by weight HCl and NaOH
Abstract:In this undergraduate thesis, two potentiometric methods are validated: the method for the determination of the HCl mass fraction in hydrochloric acid samples and the method for the determination of NaOH mass fraction in sodium hydroxide samples. Automatic titration and potentiometric definition of the endpoint. were used for the validation. Linearity, repeatability, reproducibility, accuracy in robustness of testing methods were examined in the validation process. After selecting the appropriate validation parameters, experiments were carried out and the suitability the methods was confirmed. The measurement uncertainty of the result of the mass fraction results HCl and NaOH was evaluated. We found out that the procedure for the determination of the HCl and NaOH mass fraction in hydrochloric acid and sodium hydroxide samples is suitable for the intended use. The validation showed that both test methods are precise, exact, linear and robust. All measurement uncertainty sources were identified/determined and with the use of model equasions, extended measurement uncertainty was calculated.
Keywords:hydrochloric acid, sodium hydroxide, automatic titrator, potentiometric titration, endpoint, combined glass electrode


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