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Title:Določevanje težkih kovin in toksičnih organskih spojin v ekstraktih listov Lawsonia inermis L. : diplomsko delo univerzitetnega študijskega programa I. stopnje
Authors:ID Kristan, Špela Vivijana (Author)
ID Islamčević Razboršek, Maša (Mentor) More about this mentor... New window
ID Simonič, Marjana (Comentor)
ID Rep, Pija (Comentor)
Files:.pdf UN_Kristan_Spela_Vivijana_2020.pdf (3,79 MB)
MD5: 8F7801B099450E1A7596E11A35040C90
PID: 20.500.12556/dkum/1c855bfe-f220-4f0b-8537-15625f98d883
 
Language:Slovenian
Work type:Bachelor thesis/paper
Typology:2.11 - Undergraduate Thesis
Organization:FKKT - Faculty of Chemistry and Chemical Engineering
Abstract:Lawsonia inermis L. znana tudi pod imenom hena, je rastlina, ki se uporablja kot naravna barva za lase, poslikavo kože in nohtov. Takšna naravna barvila lahko vsebujejo težke kovine ali toksične organske spojine v sledovih, ki ob prepogosti izpostavljenosti povzročijo škodljive učinke na zdravje ljudi. Zato je izrednega pomena določevanje nevarnih substanc v pasti oz. listih hene z zanesljivimi analiznimi metodami z zmožnostjo zaznave nizkih koncentracij preiskovanih spojin. V diplomskem delu smo določili vsebnosti štirinajstih težkih kovin v vzorcih hene z masno spektrometrijo z induktivno sklopljeno plazmo (ICP MS) in vsebnosti dveh aromatskih aminov (para-fenilendiamina in orto-fenilendiamina) s tekočinsko kromatografijo visoke ločljivosti (HPLC) z DAD detektorjem. Za analizo živega srebra smo uporabili atomsko absorpcijsko spektrometrijo (AAS), saj se pri ICP MS analizi pojavljajo prevelike motnje. Analizirali smo osem komercialno dostopnih barv, ki so bile kupljene na slovenskem tržišču in en vzorec prahu hene, brez deklaracije, kupljen na tržnici v Egiptu. V vseh vzorcih hene smo v sledovih odkrili težke kovine. Večina koncentracij težkih kovin je bila znotraj predpisanih mejnih vrednosti, ki jih predpisujejo mednarodne organizacije in vladne institucije za kozmetične izdelke ali heno. Izjema so bile koncentracije kroma, z maksimalno vrednostjo 137,01 mg/kg in koncentracije niklja, z maksimalno vrednostjo 14,49 mg/kg. Od vseh elementov smo najvišje vrednosti izmerili za aluminij v obsegu 472 mg/kg do 5907 mg/kg, za katerega sicer ni predpisanih mejnih vrednosti v kozmetičnih izdelkih ali v heni. S HPLC analizo smo ugotovili, da so v vseh analiziranih vzorcih hene vrednosti aminov pod mejo določljivosti.
Keywords:Hena, Lawsonia Inermis, težke kovine, aromatski amini, ICP-MS, HPLC
Place of publishing:Maribor
Place of performance:Maribor
Publisher:[Š. V. Kristan]
Year of publishing:2020
Number of pages:X, 55 str.
PID:20.500.12556/DKUM-76190 New window
UDC:543.632.495:582.772.2(043.2)
COBISS.SI-ID:19694083 New window
NUK URN:URN:SI:UM:DK:LIYQMCMD
Publication date in DKUM:10.06.2020
Views:1826
Downloads:147
Metadata:XML DC-XML DC-RDF
Categories:KTFMB - FKKT
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Licences

License:CC BY-NC-ND 4.0, Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Link:http://creativecommons.org/licenses/by-nc-nd/4.0/
Description:The most restrictive Creative Commons license. This only allows people to download and share the work for no commercial gain and for no other purposes.
Licensing start date:22.04.2020

Secondary language

Language:English
Title:Determination of heavy metals and toxic organic compounds in Lawsonia inermis L. leaves extracts
Abstract:Lawsonia inermis L. also known as Henna, is a plant used as a natural hair, skin and nails colorant. Natural colorants derived from dried and crushed leaves may contain heavy metals and toxic organic compounds as trace elements which can pose a high risk to human health. Therefore, identifying hazardous substances in henna paste or in hena leaves is of a great importance. For analysis reliable and sensitive analytical methods that can detect low concentrations of the compounds must be used. Henna samples were analyzed to determine the contents of fourteen different heavy metals by using mass spectrometry with inductively coupled plasma (ICP MS) and to determine the contents of two aromatic amines (para-phenylendiamine and orto-phenylendiamine) with high performance liquid chromatography (HPLC) and DAD detection. Atomic absorption spectrometry (AAS) was used for the analysis of mercury since mercury causes much of interferences in ICP-MS analysis. Eight commercially available samples of henna purchased on the Slovenian market and one sample of henna purchased on a local market in Egipt were analysed. Heavy metals were detected in all samples in traces. Most of heavy metal concentrations were within the limit values prescribed by international organisations and government institutions in cosmetic products or Henna, with an exception of chromium (maximum concentration 137,01 mg/kg) and nickel (maximum concentration 14,49 mg/kg). In all of the henna samples concentrations of aluminium were higher than any other metal, ranging between 472 mg/kg and 5907 mg/kg. The results of HPLC analysis have shown that the levels of aromatic amines were under the limit of quantitation.
Keywords:Hena, Lawsonia Inermis, heavy metals, aromatic amines, ICP-MS, HPLC


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