20.500.12556/RUL-63656 Ugotavljanje prostega formaldehida v lesnih tvorivih Determination of free formaldehyde released in wood-based material Količina prostega formaldehida v lesnih proizvodih je kljub nizkim vrednostim še vedno predmet stalnega nadzora in tudi predmet novih raziskav. Kljub številnim razvitim in tudi uporabljenim metodam danes še ne obstaja univerzalna metoda, s katero bi z največjo zanesljivostjo ugotovili količino vsebovanega prostega formaldehida v lesnih proizvodih. V različnih deželah se uporabljajo različne standardizirane metode. Korelacije med nekaterimi od njih še niso znane. V prispevku smo ugotavljali vsebnost postega formaldehida v ivernih ploščah po perforatorski metodi, s ciljem določitve korelacije med jodometrično titracijo in acetilacetonsko metodo. Ker na količino sproščenega prostega formaldehida vpliva tudi struktura materiala, smo ugotavljali tudi vpliv sestave iverne plošče na količino oddanega formaldehida. Korelacija med jodometrično titracijo in acetilacetonsko metodo je dobra (R2= 0,8265). Sestava iverne plošče, pri čemer smo se omejili na razmerje med srednjim in zunanjima slojema iverne plošče, vpliva na količino oddanega formaldehida. The quantity of free formaldehyde in wood products in spite of low values is still the subject of constant supervision and also the subject of new investigations. Despite numerous methods developed and in use, there is, presently, still no universal method by means by which the quantity of free formaldehyde release in wood products can be established with certainty. In the various countries, various standardised methods are in use. The correlations among some of them are still unknown. In the article we determined the content of released free formaldehyde in particleboards according to the perforator method with the objective to determine the correlation between the iodimetric titration and acetylacetone method. Becausethe quantity of released formaldehyde is also affected by the structureof the material, we also tried to establish the influence of the composition of a chipboard on the quantity of released formaldehyde. The correlation between the iodimetric titration and acetylacetone method is good (R2 = 0.8265). The composition of a chipboard (where we limited ourselves to the ratio between the middle and external layers of the particleboard) has influence on the quantity of released formaldehyde. formaldehid lesno tvorivo lesni proizvod vsebnost prostega formaldehida perforatorska metoda metoda komore formaldehyde wood-based material free formaldehyde release perforator method chamber method true false false Inštitut za gozdno in lesno gospodarstvo Slovenski jezik Angleški jezik Delo ni kategorizirano 2015-07-10 19:39:31 2015-07-10 19:39:31 2022-08-01 12:40:03 0000-00-00 00:00:00 2000 0 0 Str. 27-46 Št. 63 2000 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 630 0351-3114 793510 6206978 RAZ_Gornik_Bucar_Dominika_2000.pdf RAZ_Gornik_Bucar_Dominika_2000.pdf 1 0B4B696955B17D77F67FCD9DDBF53624 6299fcb219202e20d4139f8dbb7ed3323b1ace9773308f4e731158b510bddb7c 2e575566-568b-11ec-abdb-00155dcfd717 20.500.12556/rul/3793e288-0ab1-4b4f-b3f1-61f09c8ac1cf https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=151845 Biotehniška fakulteta 0 0 0