Analytical device and method of using same
OwnerRobert E. Mooreinventor
Life of this patent
Estimating the term…
Abstract
The invention provides an analytical device, and method of using same, for detecting a gaseous or volatile analyte and adaptable to be applied directly to the surface of a solid material from which said analyte is emitted. The device comprises a substrate for disposition adjacent a surface of the solid material, and applied to the substrate are (a) an analyte-reactive component which reacts with said analyte, and (b) an indicator in sufficient quantity to produce a detectable signal selective to the reaction thereby detecting said analyte. The analytical device has no exogenous reagent.
Claims36
An analytical device for detecting a gaseous or volatile analyte emitted in situ from a component incorporated into a solid material, said device adaptable to be applied directly to a surface of a said solid material from which said analyte is emitted, comprising:
- a substrate for disposition adjacent a surface of said solid material, said substrate having applied thereto (a) an analyte-reactive component which reacts with said analyte, and (b) an indicator in sufficient quantity to produce a detectable signal selective to the reaction thereby detecting said analyte;
- an overlay for said substrate outwardly disposed relative to said surface of said solid material, said overlay being substantially impermeable to said analyte and being substantially inert to said analyte and to said analyte-reactive component;
- and said analytical device requiring no exogenous reagent.
A detector kit for detecting the presence of a gaseous or volatile analyte and adaptable to be applied directly to the surface of a solid material from which said analyte is emitted, comprising:
- a first substrate for adjacent disposition with a surface of said solid material, said first substrate having applied thereto (a) an analyte-reactive component which reacts with said analyte, and (b) an indicator in sufficient quantity to produce a detectable signal selective to the reaction thereby detecting the presence of said analyte, and said detector having no exogenous reagents;
- and a second substrate for adjacent disposition with a surface of said solid material, said second substrate having applied thereto the same indicator as applied to said first substrate;
- said first and second substrates affixed in juxtaposition to the tacky facing of an adhesive element having overlapping edges for affixing said substrates to said surface of said solid material;
- said adhesive element being substantially impermeable to said analyte, being substantially inert to said analyte and to said analyte-reactive component, and optically transparent to said color signal.
An analytical device for detecting the presence of gaseous or volatile formaldehyde emittable from a solid material and adaptable to be applied directly to a surface of a said solid material having incorporated therein a formaldehyde component from which the formaldehyde is emitted, comprising:
- a substrate for disposition adjacent a surface of said solid material, said substrate having applied thereto (a) an analyte-reactive component which reacts with formaldehyde, and (b) an indicator in sufficient quantity to produce a detectable signal selective to the reaction thereby detecting formaldehyde;
- an overlay for said substrate outwardly disposed relative to said surface of said solid material, said overlay being substantially impermeable to formaldehyde and being substantially inert to formaldehyde and to said analyte-reactive component;
- and said analytical device requiring no exogenous reagent.
An analytical device for detecting the presence of gaseous or volatile formaldehyde emittable from a solid material and adaptable to be applied directly to the surface of the solid material from which the formaldehyde is emitted, comprising:
- a substantially planar strip of a cellulosic material for adjacent disposition with a surface of said solid material, said substrate having applied thereto (a) an analyte-reactive component which reacts with formaldehyde, and (b) an indicator in sufficient quantity to produce a color specific to the reaction thereby detecting formaldehyde;
- a membrane applied to said planar strip for interjacent disposition between said planar strip and said solid material, said membrane comprising a cellulosic material, and being permeable to gaseous formaldehyde and substantially inert to formaldehyde;
- and an adhesive element having a tacky facing overlaying said planar strip and said membrane and leaving an exposed area of said tacky facing for affixing to said surface of said solid material, said adhesive element being substantially impermeable to formaldehyde and substantially inert to formaldehyde;
- said analytical device having no exogenous reagent.
A method for detecting the presence of a gaseous or volatile analyte emitted from a solid material, which comprises providing a substrate having (a) an analyte-reactive component which reacts with said analyte, and (b) an indicator in sufficient quantity to produce a color specific to the reaction thereby detecting the presence of said analyte, placing said substrate adjacent a surface of said solid material, providing an overlay for said substrate, said overlay being substantially impermeable to said analyte, allowing sufficient time for said reaction to occur, and observing any change in color on said substrate.
Dependencies are inferred from the claim text.