prikaz prve stranice dokumenta Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži
Embargo period 2027-02-12
master's thesis
Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži
diplosmki rad
2024. urn:nbn:hr:167:666351
Mrvelj, Jure
University of Split
Faculty of Chemistry and Technology
Division of Chemistry

Cite this document

Mrvelj, J. (2024). Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad (Master's thesis). Split: University of Split, Faculty of Chemistry and Technology. Retrieved from https://urn.nsk.hr/urn:nbn:hr:167:666351

Mrvelj, Jure. "Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:167:666351

Mrvelj, Jure. "Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad." Master's thesis, University of Split, Faculty of Chemistry and Technology, 2024. https://urn.nsk.hr/urn:nbn:hr:167:666351

Mrvelj, J. (2024). 'Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad', Master's thesis, University of Split, Faculty of Chemistry and Technology, accessed 01 April 2025, https://urn.nsk.hr/urn:nbn:hr:167:666351

Mrvelj J. Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad [Master's thesis]. Split: University of Split, Faculty of Chemistry and Technology; 2024 [cited 2025 April 01] Available at: https://urn.nsk.hr/urn:nbn:hr:167:666351

J. Mrvelj, "Ispitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad", Master's thesis, University of Split, Faculty of Chemistry and Technology, Split, 2024. Available at: https://urn.nsk.hr/urn:nbn:hr:167:666351

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Metadata
TitleIspitivanje stabilnosti otopina fluorida različitih koncentracija u staklenoj ambalaži : diplosmki rad
Title (english)Testing the stability of fluoride solutions of different concentrations in glass packaging : diploma thesis
AuthorJure Mrvelj
MentorJosip Radić (mentor)
Committee memberMila Radan (predsjednik povjerenstva)
Committee memberMaša Buljac (član povjerenstva)
Committee memberJosip Radić (član povjerenstva)
GranterUniversity of Split
Faculty of Chemistry and Technology
(Division of Chemistry)
Split
Defense date and country2024-07-18, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Chemistry
Abstract
Staklo je jedan od najvažnijih materijala u svakodnevnom životu, u kojem se pojavljuje posvuda, a razlog zbog kojeg se tako često koristi je njegova kemijska stabilnost. Kemijski je stabilno zbog svoje amorfne strukture odnosno izostanka pravilnog rasporeda atoma. Iako je staklo otporno na mnoge kemikalije, ono nije univerzalno inertno. Zadatak ovog diplomskog rada je bio u određenom vremenskog periodu, u nekoliko staklenih boca pohraniti različite koncentracije standardne... More otopine natrijevog fluorida, utvrditi utječe li pohrana tih otopina u staklu na promjenu koncentracije fluorida, odnosno događa li se interakcija otopine (fluorida) sa staklom. U eksperimentu su pripravljene otopine natrijevog fluorida u rasponu koncentracija 1,0×10 --6 do 1,0×10 -2 mol L -1 . Radnim otopinama u svakom mjerenju izmjeren je potencijal, konstruiran je graf ovisnosti potencijala o pF-vrijednosti koncentracija i metodom dodatka standarda matematičkim modelom određena koncentracija. Na temelju eksperimentalnih podataka doneseni su određeni zaključci. Najmanje odstupanje od očekivane koncentracije ispitivanih otopina zabilježeno je u otopini koncentracije 1,0×10 -2 mol L -1 , dok je najveće odstupanje zabilježeno u otopini koncentracije 1,0×10 -3 mol L -1 . Koncentracija otopine 1×10 -5 mol L - 1 je bila nešto malo viša u odnosu na očekivanu vrijednost kroz sva mjerenja. U nastavku eksperimenta uočeno je kako se prvotno izmjerene koncentracije previše ne mijenjaju, pri tome blago rastu ili padaju ali variraju oko početno izmjerenih vrijednosti. Iz grafičkog prikaza ovisnosti pF vrijednosti o danima mjerenja, kao i iz ovisnosti nagiba o danima mjerenja zaključeno je kako se koncentracije, iako u pojedinačnim mjerenjima blago rastu ili padaju, u konačnici ipak ne mijenjaju drastično što ukazuju i navedeni grafički prikazi iz kojih se vidi da su rezultati smješteni uglavnom linearno. Obzirom na to da se ni pri jednoj koncentraciji ne uočava kontinuirani pad vrijednosti kroz cijeli period mjerenja, zaključuje se da u ovom eksperimentu staklo ne utječe na koncentraciju fluorida. Less
Abstract (english)
Glass is one of the most important materials in everyday life, in which it appears everywhere, and the reason it is used so often is its chemical stability. It is chemically stable due to its amorphous structure, i.e. the absence of a regular arrangement of atoms. Although glass is resistant to many chemicals, it is not universally inert. The task of this thesis was to store different concentrations of a standard solution of sodium fluoride in several glass bottles for a... More certain period of time, to determine whether the storage of these solutions in glass affects the change in fluoride concentration, or whether the solution (fluoride) interacts with the glass. In the experiment, sodium fluoride solutions were prepared in the concentration range of 1,0×10 -6 to 1,0×10 -2 mol L -1 . The potential was measured with the working solutions in each measurement, a graph of the dependence of the potential on the pF-value of the concentrations was constructed, and the concentration was determined using the standard addition method using a mathematical model. Based on the experimental data, certain conclusions were drawn. The smallest deviation from the expected concentration of the tested solutions was recorded in a solution with a concentration of 1,0×10 -2 mol L -1 , while the largest deviation was recorded in a solution with a concentration of 1,0×10 -3 mol L -1 . The concentration of the solution 1,0×10 -5 mol L -1 was slightly higher compared to the expected value throughout all measurements. In the continuation of the experiment, it was observed that the initially measured concentrations do not change too much, while they rise or fall slightly, but vary around the initially measured values. From the graphical presentation of the dependence of the pF value on the days of measurement, as well as from the dependence of the slope on the days of measurement, it was concluded that the concentrations, although they slightly increase or decrease in individual measurements, ultimately do not change drastically, as indicated by the above graphical representations, which show that the results are arranged mostly linearly. Given that no continuous decrease in values is observed at any concentration throughout the entire measurement period, it is concluded that in this experiment the glass does not affect the fluoride concentration. Less
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:167:666351
Study programmeTitle: Chemistry; specializations in: Environmental Protection, Organic Chemistry and Biochemistry
Course: Environmental Protection
Study programme type: university
Study level: graduate
Academic / professional title: magistar/magistra kemije (magistar/magistra kemije)
Type of resourceText
File originBorn digital
Access conditionsEmbargoed access
Embargo expiration date: 2027-02-12
Terms of useLicence In copyright icon
Created on2024-09-04 07:41:51
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