A portable chemical contaminant detection system and related methods are provided. The contaminant detection system includes a portable detector having a probe and detector circuitry for detecting a predetermined contaminant in a sample. The system may also include a mobile device configured to wirelessly receive contaminant detection data from the portable detector and transmit the contaminant detection data from the portable detector to processor in real-time. The mobile device may be further configured to receive and display on the mobile device real-time contaminant level data processed by the processor from the contaminant detection data.

The present application discloses methods for detecting and quantifying tetrakis(hydroxymethyl) phosphonium sulfate (THPS) in a water sample. In the methods, a water sample is mixed with a KMnO.sub.4 solution to form a mixture. An intensity of KMnO.sub.4 absorption in the mixture is then measured at a wavelength of 525 nm. The measured intensity is normalized by subtracting a background intensity at a wavelength of 650 nm. The presence and concentration of THPS in the water sample can then be determined by comparing the normalized intensity with intensity values of KMnO.sub.4 absorption of calibration samples comprising KMnO.sub.4 and known THPS concentrations.

Systems and methods of the present disclosure include the use of a tracer in agricultural spray solutions, and preferably a metal tracer, to determine if off-target drift of an active ingredient (AI) is based on drift caused during application or volatility of AI after application.

A method for detecting glutaraldehyde in a water sample in which Au-BSA nanoclusters have been introduced is provided. In the method, the water sample is mixed with the Au-BSA nanoclusters to form a mixture. The mixture is incubated for 2 to 10 minutes, and the glutaraldehyde present in the mixture reacts with the Au-BSA nanoclusters and causes fluorescence quenching of the Au-BSA nanoclusters. Then a fluorescence intensity of the quenched Au-BSA nanoclusters in the mixture is measured at an emission wavelength of 675 nm. A presence and concentration of glutaraldehyde in the water sample is then determined by comparing the measured fluorescence intensity of the quenched Au-BSA nanoclusters at the emission wavelength of 675 nm with fluorescence intensity values of calibration samples comprising Au-BSA nanoclusters and known glutaraldehyde concentrations.

A portable chemical contaminant detection system and related method is provided. The detection system includes a detector having one or more probes and associated detector circuitry that is in communication with a mobile device. The system is in communication with a remotely located server, where the detection system transmits contaminant detection signals while measuring a fluid from a product or a container of a chemical used on the product. The contaminant detection signals are transmitted in real-time and the detection system receives contaminant level information determined by the server. The server may process data from multiple probes to track multiple contaminants or a single contaminant based on the multiple different probe data from a single detector. The system displays real-time decontamination feedback and displays process completion notification or automatically implements decontamination shut-off. The server tracks location information and contaminant levels for products and communicates with third party certification servers.

An open-cell foam structure that is impregnated with a disinfectant and used to remove pathogens from air, water, and surfaces, and kill the pathogens

An open-cell foam biological indicator for bacteria detection and removal from water or air, and methods of use.

The present disclosure relates to the determination of pesticides, e.g., polar pesticides, in a sample using chromatography. The present disclosure can provide direct analysis of polar pesticides, including anionic polar pesticides, using high performance liquid chromatography. The polar pesticides are sufficiently retained and resolved to allow for multiple polar pesticide determinations in a single analysis.

The present invention describes several embodiments of a device that allows for the supporting, storage and deployment of large surface area thin film solid phase microextraction (TF-SPME) chemical samplers from within a sample fluid carrier. The utility of said supporting device originates from the process by which the extraction surface is stabilised within a sample carrying fluid for the extraction of chemical molecules from said sample carrying fluid. The device is also characterized by having a seating cavity, and moving mechanism or cap that can switch the supported TF-SPME chemical sampler between an open, sampling position or closed storage position.

Disclosed are methods, devices, kits, components, and compositions for detecting a target molecule in a test sample using a cell-free protein synthesis (CFPS) reaction. The methods, devices, kits, components, and compositions may be utilized for detecting target molecules which may include small molecules and/or metabolites of small molecules. The components and compositions used in the disclosed methods, devices, and kits may be dried or lyophilized and may be present or immobilized on a paper substrate, for example, as a paper test article.