20.500.12556/DKUM-23154 DOLOČANJE IZBRANIH HLAPNIH ORGANSKIH SPOJIN S PLINSKO KROMATOGRAFIJO IN MASNO SPEKTROMETRIJO (HS-SPME/GC-MS) S TEHNIKO NADPROSTORA IN MIKROEKSTRAKCIJO NA TRDNI FAZI DETERMINATION OF SELECTED VOLATILE ORGANIC COMPOUNDS WITH GAS CHROMATOGRAPHY AND MASS SPECTROMETRY (HS-SPME/GC-MS) USING HEADSPACE TECHNIQUE AND SOLID PHASEMICROEXTRACTION Namen diplomske naloge je določiti izbrane hlapne organske spojine v pitni vodi. Pri določevanju smo uporabili tehniko HS-SPME/GC-MS za spojine z nizkim pragom vonjanja (geozmin, 2-MIB, IPMP, IBMP in TCA) na nanogramskem koncentracijskem nivoju od 2 ng/L do 40 ng/L in polarne hlapne organske spojine (MTBE, 1,4-dioksan, epiklorohidrin, 1,3-dioksolan in 2-metil-1,3-dioksolan) na mikrogramskem koncentracijskem nivoju od 0,2 μg/L do 4 μg/L. Pri pripravi vzorcev smo uporabljali HS-stekleničke s teflonskim tesnilom, v katere smo dodajali vzorce vode in NaCl. Rezultate vsebnosti izbranih hlapnih organskih spojin smo statistično ovrednotili glede na zahteve razvoja metode (linearnost, ponovljivost, meja določljivosti-LOQ, učinkovitost ekstrakcije, vpliv temperaturne pri ekstrakciji in vpliv dodanega NaCl). Rezultati so pokazali, da je analizna metoda uporabna za določanje izbranih hlapnih spojin v pitni vodi, saj so bili rezultati ponovljivi in znotraj predpisanega kriterija, razen epiklorhidrina, pri katerem mejo določljivosti nismo mogli določiti. The purpose of this diploma work is to determine the selected volatile organic compounds in drinking water. The HS-SPME/GC-MS technique was used for compounds with a low threshold of smell (geozmine, 2-MIB, IPMP, IBMP in TCA) at nanogram concentration level from 2 ng/L to 40 ng/L and polar volatile organic compounds (MTBE, 1,4-dioxane, epichlorohidrin, 1,3-dioxolane in 2-methyl-1,3-dioxolane) at microgram concentration level from 0,2 μg/L to 4 μg/L. After sample preparation HS-bottles with Teflon seals were used in which we added water samples and NaCl. The results of the levels of selected volatile organic compounds were statistically evaluated according to the requirements of the development of the method (linearity, repeatability, limit of quantitation-LOQ, extraction efficiency, the influence of extraction temperature and influence of NaCl). The results showed that the analytical method is useful when determining selected volatile organic compounds in drinking water, since the results were repeatable and within the prescribed criteria, except for epichlorhidrin where the limit of quantitation could not be determined. hlapne organske spojine plinska kromatografija z masno spektrometrijo tehnika nadprostora mikroekstrakcija na trdni fazi voda volatile organic compounds gas chromatography with mass spectrometry headspace technique solid phase microextraction water true true false [I. Zatler] Slovenski jezik Angleški jezik Diplomsko delo 2012-05-23 13:43:20 2012-05-24 07:53:00 2022-04-14 12:22:37 2023-12-29 03:31:43 2012 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 543.444.3:663.2(043.2) 16693014 URN:SI:UM:DK:7GCOVSVG VS_Zatler_Igor_2012.pdf VS_Zatler_Igor_2012.pdf 1 320C2628586327A63DEAAF81061331A6 09bc4d041a9548f8e184f5cba8e28d4b4964c3e29035ad1738868bd6d726ea18 a6d99f52-7c06-11eb-bb7a-00155d0001ca 20.500.12556/dkum/47494384-e69a-4aec-b597-7ac24d096a49 https://dk.um.si/Dokument.php?lang=slv&id=30191 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0