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Student Essays / Kemiteknik

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Student Essays / Kemiteknik

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Identification and determination of NH4+ ions in D-Ala-NH2∙HCl drug s...
Khan, Zenith; Salim, Sara : Malmö högskola/Teknik och samhälle (2005)	STUDENT ESSAY

English abstract:

The quality control laboratory at PolyPeptide has been performing analysis based on ion chromatography (IC) of peptides. A method for separation of negative ions (acetate, chloride etc) is already in use. Lately there has been a need for developing a method to separate positive ions, like ammonium ions, in peptides. The task of this project was to develop a method for ion chromatography, suitable for determination of ammonium ions in the substance D-alanine amide, hydrochloride (D-Ala-NH2∙HCl). The D-alanine amide, hydrochloride is an amino acid derivative used as starting material for chemical synthesis of peptides. These peptides are used as active pharmaceutical substances. It is most possible to find ammonium chloride in amino acids substances which content amid group, as D-Ala-NH2∙HCl. The ammonium chloride is formed during the synthesis of these amino acid derivatives. The reason for analysing ammonium ions is that there is some risk to find undesired impurities in the product. These impurities are difficult to remove.

FInal thesis.doc (7.325Mb)

Tolkning av spektrum från Fourier transform infraröd spektroskopi (FT...
Schön, Martin; Andersson, Daniel : Malmö högskola/Teknik och samhälle (2007)	STUDENT ESSAY

English abstract:	Polykemi AB uses FTIR-analysis continuously in material identification, trouble shooting and development. The company has an extensive library of references containing spectra of raw material (polymers, additives, filling materials and fortifiers). The company buy pure polymers which are modified by mixing with filling material in an extruder, which result in a polymeric compound. The practical part of this bachelor thesis was initiated with collecting of FTIR-spectra from some of the thermopolymers, additives, filling materials and fortifiers which the company uses. Finally spectra of some polymeric compounds were collected. These spectra were interpreted and the included materials were identified. Two different methods were used to collect spectra: polymer film and diffuse reflectance. In the study of modified polymers burnout was used to facilitate the identification of inorganic filling materials. The purpose of this bachelor thesis is intended to increase the existing level of competence regarding FTIR-analysis.
Swedish abstract:	Polykemi AB använder kontinuerligt FTIR-analys för materialidentifiering, felsökning och utveckling. Företaget har ett omfattande referensbibliotek med spektra för råvaror i form av polymerer, additiv, fyllmedel och förstärkningsmedel. Företaget köper rena polymerer som modifieras genom att polymer och fyllmedel blandas i en extruder och en plastsammansättning erhålls. Den praktiska delen av examensarbetet inleddes med upptagande av FTIR-spektrer från några av de termoplaster, additiv, fyllmedel och förstärkningsmedel som företaget använder. Slutligen upptogs spektrer från ett antal modifierade plaster. Dessa spektrer tolkades och de ingående ämnena identifierades. Två olika metoder har använts vid analyserna: filmteknik och diffus reflektans. Vid studien av de modifierade plasterna användes även utbränning av proverna för att underlätta identifikation av oorganiska fyllmedel. Syftet är att examensarbetet ska kunna användas för att öka den befintliga kompetensnivån avseende FTIR-analys.

FTIR-spectrosco ... l polymer compositions.pdf (1.576Mb)

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