title: Quantitation method of N,N '-disalicylidene-1,2-propanediamine by comprehensive two-dimensional gas chromatography coupled to a nitrogen chemiluminescence detector.
abstract: Metal deactivator additives (MDAs) have been used for over 60 years to prevent metal catalyzed reactions in petroleum products; a commonly used metal deactivator is N,N'-disalicylidene-1,2-propanediamine. The quantitation of low MDA concentrations in fuels is challenging due to the complexity of the sample matrix. In this work, this difficulty was overcome using GC × GC hyphenated with a nitrogen chemiluminescence detector. The high resolution power of GC × GC avoided co-elution between the MDA and other sample matrix compounds; while the enhanced sensitivity of GC × GC and the use of a nitrogen chemiluminescence detector supplied a high sensitivity and specificity for nitrogen compounds. For the analysis, the MDA additive was derivatized with the silylation agent N,O-bis (trimethylsilyl)trifluoroacetamide at room temperature and its quantitation was based on an external calibration curve; good linear response was obtained in the 1.4-8.6 ppm range.
authors.affiliation: Universidad Complutense de Madrid, Departamento de Química Analítica, Madrid, Spain. kristina.lissitsyna@servexternos.repsol.com
authors.forename: Kristina
authors.initials: K
authors.lastname: Lissitsyna
authors.forename: Sonia
authors.initials: S
authors.lastname: Huertas
authors.forename: Luis Carlos
authors.initials: LC
authors.lastname: Quintero
authors.forename: Luis Maria
authors.initials: LM
authors.lastname: Polo