Določanje težkih kovin z ICP - AES v kalcijevih fosfatih

diplomsko delo

Tanja Tatjana Medveš (Author), Mitja Kolar (Mentor), Darinka Brodnjak-Vončina (Co-mentor)

Abstract

Namen diplomske naloge je bil s pomočjo meritev realnih vzorcev kalcijevih fosfatov in meritev referenčnih materialov oziroma standardov z ICP — AES ugotoviti ali je ta metoda primerna za določanje vsebnosti arzena, kadmija in svinca v vzorcih kalcijevih fosfatov krmne in prehrambene kvalitete ter pregled rezultatov realnih vzorcev glede na veljavno zakonodajo. Ker je proizvajalcev kalcijevih fosfatov v svetu zelo malo, tudi literature o analitiki ni veliko. Najprej sem s pomočjo referenčnega materiala in pripravljenih standardov potrdila, da je metoda, s katero sem določevala vsebnost težkih kovin, primerna za izbrano merilno območje. Nato sem izmerila še vsebnost težkih kovin v realnih vzorcih kalcijevih fosfatov ter njihove vrednosti primerjala z veljavno zakonodajo na področju krme in živil. Vsebnosti arzena, kadmija in svinca so v skladu z zakonodajo v kalcijevih fosfatih krmne kvalitete od 10 mg/kg za arzen in kadmij, do 15 mg/kg za svinec. V kalcijevih fosfatih prehrambene kvalitete pa so te vrednosti nižje, saj znašajo od 1 mg/kg za kadmij, 3 mg/kg za arzen in 4 mg/kg za svinec.

Keywords

kalcijevi fosfati;težke kovine;arzen;kadmij;svinec;

Data

Language:	Slovenian
Year of publishing:	2010
Source:	Maribor
Typology:	2.11 - Undergraduate Thesis
Organization:	UM FKKT - Faculty of Chemistry and Chemical Engineering
Publisher:	[T. T. Medveš]
UDC:	543.42:666.123.4(043.2)
COBISS:	14398742
Views:	3115
Downloads:	446
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Determination of heavy metals with ICP - AES in calcium phosphates
Secondary abstract:	The purpose of the diploma thesis was to measure in real samples of calcium phosphates and reference materials or standard solutions by ICP - AES to confirm whether this method is suitable for the determination of arsenic, cadmium and lead in samples of calcium phosphates "feed" and "food" quality and check the quality of results from real samples depending on the applicable legislation. There is few literature data available on analysis of heavy metals of calcium phosphate since there are not many producers of calcium phosphates in the world. First of all, it was confirmed using a reference material and prepared standards that the method for determination a content of heavy metals is suitable in a selected range. Then I measured the amount of heavy metals in real samples of calcium phosphates, and their content was compared with the current legislation on feed and food. The content of arsenic, cadmium and lead is in accordance with the law in calcium phosphates "feed" quality of 10 mg / kg for arsenic and cadmium, and 15 mg / kg for lead. For calcium phosphates "food" qualities these values are lower, ranging from 1 mg / kg for cadmium, 3 mg / kg for arsenic and 4 mg / kg for lead.
Secondary keywords:	ICP - AES;calcium phosphates;heavy metals;arsenic;cadmium;lead;
URN:	URN:SI:UM:
Type (COBISS):	Undergraduate thesis
Thesis comment:	Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Pages:	XII, 51 f.
Keywords (UDC):	mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;analytical chemistry;analizna kemija;spectral analysis methods;optical analysis methods;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;chemical technology;chemical and related industries;kemijska tehnologija;kemijske in sorodne industrije;glass industry;ceramics;cement and concrete;industrija stekla;keramika;cement in beton;glass industry;glass technology;glass manufacture in general;glass in the comprehensive sense;industrija stekla;tehnologija stekla;izdelava stekla na splošno;steklo v širšem pomenu;
ID:	1012037