Repozytorium publikacji - Politechnika Gdańska

Reference materials are indispensable in the qualitycontrol and quality assurance of analytical measurements. Onenovel approach to the generation of standard gaseous mixturesof toxic, reactive, volatile, labile, and malodorous substancesinvolves thermal decomposition or rearrangement, under definedtemperature conditions, of compounds immobilized, bychemical bonding, on the surface of an appropriate carrier torelease specific amounts of a volatile compound. In this techniquethe type of support used to immobilize the compound isextremely important, because the amount of analyte releaseddepends directly on the choice of material. In this paper wereport the novel preparation of a matrix-free ethene standard inthe form of glass fibres coated with a thin layer of aluminium,the surface of which is modified by reaction with a specificcompound. As a result of thermal decomposition of this compound,gaseous ethene is formed. In this paper we present theresults obtained from tests of stability and homogeneity, twoproperties of crucial importance in the preparation of referencematerials, by comparison of a series of results obtained forrandomly chosen samples of the reference material. Interlaboratorycomparative studies resulted in determination of a referencevalue for the ethene formed after thermal decompositionof the surface compound ((2.12±0.14) ng per fibre).

Autorzy

• Marta Słomińska,
• prof. dr hab. inż. Piotr Konieczka link otwiera się w nowej karcie ,
• prof. dr hab. inż. Jacek Namieśnik link otwiera się w nowej karcie