A kit for colorimetric identification of one or more cannabinoid compounds is disclosed. The kit includes at least two cannabinoid sensitive visualization reagents and a colour reference chart that may have at least two discernable colours, A method is also provided for colorimetric identification of one or more cannabinoid compounds in a liquid sample. The method includes contacting the liquid sample separately with at least two cannabinoid sensitive visualization reagents; allowing the at least two cannabinoid sensitive visualization reagents to develop for a defined amount of time; and comparing the resulting colour change of the at least two cannabinoid sensitive visualization reagents to a colour reference chart.

A label-free optical device for near real time quantification of the multifractal micro-optical properties of a sample includes a source of broadband light; a tunable filter that receives at least a portion of the broadband light and then transmits narrowband light, whereby a specific band of light is selected to avoid unwanted absorption of light by the sample; where the narrowband light is configured to illuminate a selected area of the sample, and in response elastically-scattered light is dispersed from the sample; a light collection device configured to collect at least some of the elastically-scattered light; where at least some of the collected elastically-scattered light is configured to be transmitted to a detector by the light collection device, and the detector is configured to record a light scattering signal; and where the detector is configured to perform light scattering signal measurements at multiple angles or wavelengths to determine a refractive index multifractality of the sample.

A label-free optical device for near real time quantification of the multifractal micro-optical properties of a sample includes a source of broadband light; a tunable filter that receives at least a portion of the broadband light and then transmits narrowband light, whereby a specific band of light is selected to avoid unwanted absorption of light by the sample; where the narrowband light is configured to illuminate a selected area of the sample, and in response elastically-scattered light is dispersed from the sample; a light collection device configured to collect at least some of the elastically-scattered light; where at least some of the collected elastically-scattered light is configured to be transmitted to a detector by the light collection device, and the detector is configured to record a light scattering signal; and where the detector is configured to perform light scattering signal measurements at multiple angles or wavelengths to determine a refractive index multifractality of the sample.

Systems, indicator wipe product, and methods thereof used to detect the presence of cationic polymer residues on a surface are described. In various embodiments, the cationic polymer to be detected comprises a quaternary silane residual antimicrobial. The indicator wipe may comprise a woven, nonwoven, or double-knit fabric, cotton, functional cellulose, or open cell foam material substrate impregnated with an aqueous dye solution comprising a sulfonephthalein dye. The indicator wipe may be configured to differentiate between traditional monomer quaternary ammonium compounds and cationic polymers such as quaternary silane compounds used in residual antimicrobial coatings by color changes on the indicator wipe and by observing if cationic-dye complexes diffuse by chromatography on the indicator wipe.

Systems, indicator wipe product, and methods thereof used to detect the presence of cationic polymer residues on a surface are described. In various embodiments, the cationic polymer to be detected comprises a quaternary silane residual antimicrobial. The indicator wipe may comprise a woven, nonwoven, or double-knit fabric, cotton, functional cellulose, or open cell foam material substrate impregnated with an aqueous dye solution comprising a sulfonephthalein dye. The indicator wipe may be configured to differentiate between traditional monomer quaternary ammonium compounds and cationic polymers such as quaternary silane compounds used in residual antimicrobial coatings by color changes on the indicator wipe and by observing if cationic-dye complexes diffuse by chromatography on the indicator wipe.

Various aspects of the system and methods described herein rely upon the operation of lateral flow assays specially configured to evaluate a bodily fluid for at least the presence or absence of pregnanediol glucuronide at a threshold selected from the range inclusive of 1 μg/mL-10 μg/mL. The results from the lateral flow assays are optionally interpreted in association with an application operating upon a mobile device or a system for the collection, interpretation and storage of results. The interpretations are useful in accordance with facilitating diagnoses and treatments associated with medical conditions related to the generated interpretations of the lateral flow assays.

A colorimetric sensor has a first material deposited on a surface, and sensing particles on a surface of the first material, wherein the sensing particles comprise sensing species dispersed into porous host structures, such that at least a portion of the sensing particles is exposed to an ambient environment, wherein the first material attaches the sensing particles to surface. A method of forming a colorimetric sensor including depositing a first material onto a substrate, providing porous sensing particles, wherein the sensing particles comprise sensing species dispersed into a porous host structure, and embedding the porous sensing particles onto a surface of the deposited first material, wherein the first material attaches the sensing particles to the substrate such that at least a portion of the sensing particles is exposed to an ambient environment.

A method of evaluating the quality of a color reference card having multiple color reference fields. The quality refers to whether the color reference card is usable for a method for determining concentration of analyte in a body fluid and/or to the degree of suitability or reliability of the color reference card for use with a method for determining analyte concentration in a body fluid. In the inventive method, an image is captured of at least a part of the color reference card using a mobile device camera. Measured color reference values are determined from the image for one or more of the color reference fields and a relationship between one or more of the measured reference color values and corresponding known reference color values is determined. The determined relationship is used to assess the quality of the color reference card. A kit and mobile device are also disclosed.

The present invention is directed to a coated substrate including a substrate that is part of an aerospace, a wind turbine, or a marine structure; and an exterior coating on the substrate, the exterior coating including an icephobic or a low ice adhesion composition including an indicator that is an additive that is detectable or measurable as the exterior coating wears; wherein the indicator provides indicia of wear of the exterior coating; and a method of inspecting the exterior coating on the substrate.

Medical test cards for detecting analytes are provided including a substantially planar body, an analyte detection means, an opening feature, and an optical code. The analyte detection means is enclosed within the planar body and is configured to provide a colorimetric change when a portion of the analyte detection means is contacted with the analyte. The opening feature is configured to provide access to the analyte detection means and the optical code includes information identifying the analyte detection means. Uses of such medical test cards include accessing the analyte detection means enclosed within the planar body by using the opening feature and contacting the analyte detection means with the sample. The optical code is read using an imaging device to identify the analyte detection means and the analyte detection means is imaged following contact with the sample using the imaging device.