Abstract: Ketoacidosis is an extreme and uncontrolled form of ketosis, which is a normal response to prolonged fasting. Embodiments of this invention test the ketone level of a patient by measuring the ketone bodies in breath condensation. Some embodiments include a device for medical testing comprising a hollow container, comprising powder mixture of sodium nitroferricyanide, ammonium sulfate and silica and a liquid including an ammonium hydroxide solution.

Abstract: Ketoacidosis is an extreme and uncontrolled form of ketosis, which is a normal response to prolonged fasting. Embodiments of this invention test the ketone level of a patient by measuring the ketone bodies in breath condensation. Some embodiments include a device for medical testing comprising a hollow container, comprising powder mixture of sodium nitroferricyanide, ammonium sulfate and silica and a liquid including an ammonium hydroxide solution.

Abstract: Methods for determining the presence of a ligand in a sample suspected to contain the ligand are provided, along with apparatus suitable for performing the methods. The methods depend upon a color visualization indicating the ligand's presence or absence in the sample. Preferred methods comprise contacting the sample with colored particles which bear on their surface a receptor specific for the ligand, passing the sample/particle mixture through a filter, and then analyzing the color of the filtrate. The presence of ligand in the sample is established where the color of the filtrate is substantially different from the color of the receptor-bearing particles.

Abstract: Methods for determining the presence of a ligand in a sample suspected to contain the ligand are provided, along with apparatus suitable for performing the methods. The methods depend upon a color visualization indicating the ligand's presence or absence in the sample. Preferred methods comprise contacting the sample with colored particles which bear on their surface a receptor specific for the ligand, passing the sample/particle mixture through a filter, and then analyzing the color of the filtrate. The presence of ligand in the sample is established where the color of the filtrate is substantially different from the color of the receptor-bearing particles.

Abstract: Methods for determining the presence of a first ligand, preferably a hapten, in a sample suspected to contain the first ligand are provided, along with reagent systems and apparatus suitable for performing the methods. The methods depend upon a color visualization indicating the presence or absence of the first ligand in the sample. Preferred methods comprise contacting the sample with a reagent system which comprises: (1) colored particles which bear on their surface a second ligand which may be the same as or different than the first ligand; and (2) an amount of a receptor which is specific for the first ligand and the second ligand, wherein the amount is sufficient to stabilize the particles. The methods further comprise passing the contacted sample and reagent system through a filter, and then analyzing the color of the filtrate. The presence of ligand in the sample is established where the color of the filtrate is substantially different from the color of the ligand-bearing particles.

Abstract: A method for detecting cannabinoids in body fluids which comprises filtering body fluids through a cellulosic filtering means treated with a binding agent for cannabinoids and the filtering means. The binding agent is an arylcarboxylic acid. The cannabinoids are then treated with a subsequent reagent to produce a color reaction. A device for detecting cannabinoids is also disclosed which contains the filtering means treated with the binding agent so as to concentrate the cannabinoid prior to reaction with a suitable indicator.

Abstract: A method for detecting basic narcotics or drugs in body fluids which comprises filtering body fluids through a cellulosic filtering means treated with a binding agent for the narcotics or drugs and the filtering means. The binding agent is a polycarboxylic acid. The narcotics or drugs are then treated with a subsequent reagent to produce a color reaction. A device for detecting basic narcotics or drugs in also disclosed which contains the filtering means treated with the binding agent so as to concentrate the narcotic or drug prior to reaction with a suitable indicator.

Abstract: Circuitry is disclosed for measuring the quantity of total dissolved ionized salts in an undiluted aqueous sample. A bi-level power supply operating through a square wave generator and voltage follower creates a low amplitude AC signal at a predetermined level above a ground reference. The control voltage is applied through a conductivity probe assembly to two series connected operational amplifiers operating through a bridge assembly and meter movement to provide a reading of the total dissolved ionized salts in the sample as a function of their ionization characteristics.

Abstract: There is disclosed an oil content analyzer device containing a degradable ion transport cell designed to present a changing internal impedance as a function of the oil content of water flowing therethrough. The cell is comprised of two electrodes made of dissimilar metallic compositions with a hydrocarbon-absorbing material sandwiched therebetween, and housed in a container having openings to permit water flow therethrough. In operation, a sample of water is circulated through the degradable ion transport generating device with the result that the electrical output characteristics of the device change as a function of the amount of hydrocarbons absorbed in the membrane element, whereby an electrical signal is generated which is inversely proportional to the oil content of the analyzed water sample.

Abstract: A generating device is disclosed comprising first and second electrodes made of dissimilar metals, one of said electrodes being copper which has been irradiated with electromagnetic energy at the wavelength for excitation of the K shell electrons of the copper atoms. The other electrode contains at least one element chosen from Periodic groups I, II, III, IV, VII and VIII, and is preferably nickel plated brass. The two electrodes, when maintained in an electrolyte, provide a stable electrical output. When the ion concentration of the electrolyte is below a given level, the output is proportional to the ion concentration, such that an ion detector is provided.