It is described the use of a tetraphosphonate cavitand of formula (II) in which Y = O or S; R = C.sub.4-C.sub.18 linear or branched alkyl and R.sub.1 = methyl or optionally substituted phenyl, as sensitive material in selective mass sensors for phosphine; also described are new tetraphosphonate cavitands and a method for determining phosphine in caryopses of cereals that foresees the steps of adding sulphuric acid to a sample of caryopses contained in a hermetically sealed container, obtaining an aqueous dispersion; subjecting said aqueous dispersion to microwave heating, taking the gaseous phase overhanging the aqueous dispersion into contact with a quartz crystal microbalance having a mass sensor comprising a quartz disc coated with a layer of a compound of formula (II).

Tetraphosphonate cavitands as molecular receptors in mass sensors for gases and method for determining phosphine by using said sensors

LONGOBARDI, FRANCESCO;
2006

Abstract

It is described the use of a tetraphosphonate cavitand of formula (II) in which Y = O or S; R = C.sub.4-C.sub.18 linear or branched alkyl and R.sub.1 = methyl or optionally substituted phenyl, as sensitive material in selective mass sensors for phosphine; also described are new tetraphosphonate cavitands and a method for determining phosphine in caryopses of cereals that foresees the steps of adding sulphuric acid to a sample of caryopses contained in a hermetically sealed container, obtaining an aqueous dispersion; subjecting said aqueous dispersion to microwave heating, taking the gaseous phase overhanging the aqueous dispersion into contact with a quartz crystal microbalance having a mass sensor comprising a quartz disc coated with a layer of a compound of formula (II).
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11586/20688
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