In every measurement procedure, it is important to know the components of measurement uncertainty affecting the quality of measured result and reliability of quantified result. The procedure for recognizing measurement uncertainty is not universal but depends on the method and sample type. It has to be made according to good laboratory practice. This paper aims at showing the comparison of measurement uncertainty component estimations for three methods using the high-performance liquid chromatography techniques: determination of the type and content of aromatic hydrocarbons in diesel fuels and petroleum distillates by normal phase high-performance liquid chromatography, determination of nitrates in water samples by ion chromatography, and determination of molecular weights of polystyrene by size exclusion chromatography technique. Both similarity and differences were found during the measurement uncertainty component estimation, and conclusions about influences of certain components on the result uncertainty were made.
U hrvatskoj naftnoj industriji godišnje se proizvodi značajna količina krhotina razrušenih stijena. Krhotine razrušenih stijena zagađene su otpadnom isplakom te spadaju u heterogeni otpad koji sadrži ugljikovodike, teške metale i kloride. Trenutačno se kao metoda zbrinjavanja krhotina primjenjuje metoda stabilizacije uz pomoć vapna i pijeska. Opisan je postupak pripreme stabiliziranog otpada u laboratorijskim uvjetima na dva uzorka krhotina iz isplačnih jama s područja Dravske depresije. Prije pripreme stabiliziranog otpada u laboratorijskim uvjetima, u početnom uzorku otpada određen je udio organske tvari dobiven ekstrakcijom s organskim otapalom te sadržaj ukupno topljive tvari u vodi. Na temelju te dvije osnovne analize određena je količina vapna i pijeska potrebna za izradu stabiliziranog otpada. Fizikalno-kemijske značajke početnog i stabiliziranog otpada analizirane su primjenom standardnih laboratorijskih metoda. Rezultati su pokazali da miješanje otpada s vapnom i pijeskom omogućuje prevođenje početnog uzorka otpada klasificiranog kao opasan otpad u neopasan otpad.
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