A method for the detection of hydrocarbon contamination in a sample is disclosed. The method includes contacting a sample with a molecular probe. The molecular probe has a photoluminescence which is environmentally sensitive. The photoluminescence from the molecular probe is collected. The method includes determining whether the photoluminescence is indicative of a hydrocarbon contaminated sample. A test strip for the detection of hydrocarbon contamination in a sample is also disclosed. The test strip includes a molecular probe embedded in a substrate and/or immobilized to the substrate, the molecular probe having a photoluminescence which is environmentally sensitive to hydrocarbon contaminated sample.

A glycemic management related analyte detecting assay device (10) and method are provided for detecting and quantifying analyte concentrations in a fluid sample. The assay device includes an absorbent body containing an assay forming a detection zone for receiving a fluid test sample. The absorbent body is provided in a chamber of the device. The assay can detect one or more of a glycemic analyte selected from the group consisting of fasting plasma blood glucose, oral glucose, % glycated hemoglobin, and fasting insulin concentrations. In one embodiment, a container includes an absorbent body having a plurality of superimposed membranes (30, 32, 34, 36) where each membrane contains a reactant and a color indicator for detecting the presence of a selected analyte above a predetermined concentration in the fluid sample. The absorbent body and/or the assay include a color indicator that is able to provide a visual indication of the presence of one or more glycemic analytes present in the test sample.

A glycemic management related analyte detecting assay device (10) and method are provided for detecting and quantifying analyte concentrations in a fluid sample. The assay device includes an absorbent body containing an assay forming a detection zone for receiving a fluid test sample. The absorbent body is provided in a chamber of the device. The assay can detect one or more of a glycemic analyte selected from the group consisting of fasting plasma blood glucose, oral glucose, % glycated hemoglobin, and fasting insulin concentrations. In one embodiment, a container includes an absorbent body having a plurality of superimposed membranes (30, 32, 34, 36) where each membrane contains a reactant and a color indicator for detecting the presence of a selected analyte above a predetermined concentration in the fluid sample. The absorbent body and/or the assay include a color indicator that is able to provide a visual indication of the presence of one or more glycemic analytes present in the test sample.

This invention relates to a chemical indicator, comprising: a non-cellulosic backing layer; a non-cellulosic cover layer overlying the backing layer; the backing layer and/or the cover layer comprising a gas permeable polymeric film; a non-cellulosic wicking material positioned between the backing layer and the cover layer; a dye composition positioned between the backing layer and the cover layer and in contact with or nearly in contact with the wicking strip, the dye composition comprising an indicator dye which changes color in the presence of hydrogen peroxide, and a base medium, which melts at a temperature in the range from about 45° C. to about 65° C.; the cover layer including a transparent portion to permit observation of the wicking material; and an adhesive for adhering the cover layer to the backing layer. The chemical indicator may be referred to as a moving front chemical indicator. A process for conducting a vaporous hydrogen peroxide (VHP) sterilization process using the foregoing chemical indicator is disclosed.

A composition comprising at least an electron-donating color-developing organic compound, an electron-accepting compound, and a color development regulator that hampers the color development by the electron-donating color-developing organic compound and the electron-accepting compound, wherein the color development regulator is hydrophilic, and the composition can change the color thereof in the presence of water or a water-containing liquid. A coloring agent comprising the composition, which composition is retained or carried by a specified microbody and can change its color in the presence of water or a water-containing liquid, wherein the specified microbody allowing water or a water-containing liquid to come into contact with the retained or carried composition.

Apparatuses, systems, and methods for detecting and monitoring hydrogen sulfide in a natural gas stream are disclosed herein. The apparatuses typically include a body comprising at least a first wall, a second wall spaced from the first wall, and a third wall coupled to the first wall and the second wall, wherein the first wall, the second wall, and the third wall define a chamber. The apparatus also typically includes an inlet conduit configured to receive a gaseous stream comprising natural gas and provide the gaseous stream to the chamber; a pressure valve coupled to the exit port, the pressure valve being configured to actuate to release an amount of gas; and an indicator at least partially disposed in the chamber, wherein the indicator comprises a reactive material that is adapted to produce a visual change in the presence of hydrogen sulfide.

The present invention provides an indicator useful in confirming successful sterilisation and/or nucleic acid decontamination by ethylene oxide (EtO) treatment. The invention also provides a label comprising said indicator and methods for use of the indicator and label in a method of EtO treatment.

The invention relates to luminescence-based compounds, compositions and methods for chemical sensing in solid state and solutions. More particularly, the invention includes “turn-on” lanthanide sensors that luminesce only in the presence of an organic compound (analyte) and are non-emissive in the absence of the organic compound (analyte).

The invention relates to luminescence-based compounds, compositions and methods for chemical sensing in solid state and solutions. More particularly, the invention includes “turn-on” lanthanide sensors that luminesce only in the presence of an organic compound (analyte) and are non-emissive in the absence of the organic compound (analyte).

The disclosure is directed at a system and method for non-microbial prediction of antimicrobial efficacy of an antimicrobial item, such as, a metal surface or materials impregnated with biocidal metal ions or nanoparticles. A test formulation is applied to a surface of interest and a color change of the test formulation is then analyzed and then correlated with antimicrobial activity.