izpis_h1_title_alt

Rentgenska praškovna difrakcija prehranskih dopolnil
BELE, TEJA (Author), Meden, Anton (Mentor) More about this mentor... This link opens in a new window

.pdfPDF - Presentation file, Download (3,98 MB)
MD5: 8193F7F8DB2B16EE1B54A155EAED41B8

Abstract
Prehranska dopolnila so danes močno razširjena na trgu. Veliko ljudi posega po njih, zato sem se odločila preveriti njihovo fazno sestavo in jo primerjati z deklaracijo posameznega izdelka. To mi je omogočila rentgenska praškovna difrakcija, pri kateri obsevamo vzorce z rentgensko svetlobo specifične valovne dolžine. Vzorec mora vsebovati kristalinične snovi, saj metoda temelji na periodično urejeni strukturi kristalov. Analizirala sem 21 vzorcev prehranskih dopolnil. Za določitev fazne sestave sem si pomagala z dvema programoma, X΄ pert HighScore Plus in Crystallographica Search-Match (CSM). S pomočjo programa X΄ pert HighScore Plus sem prikazala difraktograme posnetih vzorca ter jih med seboj primerjala glede na skupne lastnosti vzorca. Vzorce sem umestila v šest skupin: glede na vsebnost magnezija, kalcija, železa, cinka, selena ter vzorce, ki se nahajajo v obliki šumeče tablete. CSM-program pa mi je omogočil primerjavo difgraktograma posameznega standarda spojine z difraktogramom vzorca. S kvalitativno analizo sem ugotovila, da sem pri večini vzorcev lahko potrdila faze, navedene v deklaraciji izdelka. V zbirki PDF nisem našla magnezijevega citrata, zato ga ni bilo mogoče identificirati. Selena v vzorcih nisem uspela identificirati, saj se ta nahaja pod mejo zaznave. Med difraktogrami posnetih vzorcev najdemo tudi tipični difraktogram amorfne snovi.

Language:Slovenian
Keywords:rentgenska praškovna difrakcija, kvalitativna fazna analiza, prehranska dopolnila, minerali, vitamini
Work type:Bachelor thesis/paper (mb11)
Tipology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Technology
Year:2020
COBISS.SI-ID:27584259 This link opens in a new window
Views:326
Downloads:222
Metadata:XML RDF-CHPDL DC-XML DC-RDF
 
Average score:(0 votes)
Your score:Voting is allowed only to logged in users.
:
Share:AddThis
AddThis uses cookies that require your consent. Edit consent...

Secondary language

Language:English
Title:X-ray powder diffraction of dietary supplements
Abstract:
Nowadays dietary supplements are widespread on the market. As they are used by many people, I decided to investigate their phase composition and compare my findings with the product's declaration. I preformed X-ray powder diffraction, which involves irradiating the samples with X-rays of a specific wavelength. The analysed sample must contain crystalline matter, as the method relies on the periodic arrangement of atoms in crystals. I analysed 21 samples of dietary supplements. To determine the phase composition, I used two software packages, X΄ pert HighScore Plus and Crystallographica Search-Match (CSM). I used X΄ pert HighScore Plus to display the recorded diffractograms and compare them based on common traits of the sample. I sorted the samples into 6 groups: based on magnesium, calcium, iron, zinc and selenium content, and samples in the form of an effervescent tablet. The CMS software package allowed me to compare the difractogram of a standard solution with the diffractogram of the sample. Using qualitative analysis, I was able to confirm that the phase composition of most samples matches the information in the product’s declaration. I wasn't able to identify magnesium citrate, as it wasn't present in the PDF collection. I also wasn't able to identify selenium in the samples, as its quantity was too low to detect. The typical diffractogram of an amorphous substance can also be found amongst the recorded diffractograms.

Keywords:X-ray Powder Diffraction, qualitative phase analysis, nutritional supplements, minerals, vitamins

Similar documents

Similar works from RUL:
Similar works from other Slovenian collections:

Comments

Leave comment

You have to log in to leave a comment.

Comments (0)
0 - 0 / 0
 
There are no comments!

Back