Ugotavljanje prostega formaldehida v lesnih tvorivih

Gornik Bučar, Dominika (author), Medved, Sergej (author)

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.

• Language: Slovenian
• Keywords: formaldehid, lesno tvorivo, lesni proizvod, vsebnost prostega formaldehida, perforatorska metoda, metoda komore
• Work type: Not categorized
• Typology: 1.01 - Original Scientific Article
• Organization: BF - Biotechnical Faculty
• Publisher: Inštitut za gozdno in lesno gospodarstvo
• Year: 2000
• Number of pages: Str. 27-46
• Numbering: Št. 63
• PID: 20.500.12556/RUL-63656
• UDC: 630
• ISSN on article: 0351-3114
• COBISS.SI-ID: 793510
• Publication date in RUL: 10.07.2015

Record is a part of a journal

• Title: Zbornik gozdarstva in lesarstva. forest and wood science & technology
• Shortened title: Zb. gozd. lesar.
• Publisher: Gozdarski inštitut Slovenije, Biotehniška fakulteta, Oddelek za gozdarstvo in obnovljive gozdne vire, Biotehniška fakulteta, Oddelek za lesarstvo
• ISSN: 0351-3114
• COBISS.SI-ID: 6206978

Secondary language

• Language: English
• Title: Determination of free formaldehyde released in wood-based material

Abstract

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.

• Keywords: formaldehyde, wood-based material, free formaldehyde release, perforator method, chamber method