A method of effecting increased performance of diagnostic enzyme reaction systems which includes contacting at least one reagent of an enzyme-diagnostic kit during use of the reagent in conjuction with the kit with a noble gas, mixture of noble gases or gas mixtures containing at least one noble gas.
Methods and apparatus for measuring the concentration of decomposable substances, such as urea, are disclosed. The disclosed methods include adding a gaseous buffer, such as CO.sub.2, to the solution containing the decomposable compound, measuring the conductivity of the solution, decomposing the decomposable compound, measuring the conductivity of the thus-decomposed compound solution, and calculating the differential conductivities between the two measured solutions. The apparatus for carrying out these methods are also disclosed.
Methods and apparatus for measuring the concentration of decomposable substances, such as urea, are disclosed. The disclosed methods include adding a gaseous buffer, such as CO.sub.2, to the solution containing the decomposable compound, measuring the conductivity of the solution, decomposing the decomposable compound, measuring the conductivity of the thus-decomposed compound solution, and calculating the differential conductivities between the two measured solutions. The apparatus for carrying out these methods are also disclosed.
A method of maintaining carbon dioxide concentration in an aqueous solution containing the same, which entails introducing an amount of a gas into the aqueous solution sufficient to maintain a desired level of carbon dioxide in the aqueous solution, the gas containing from about 25-100% by volume of argon and from about 0-75% by volume of a carrier gas therefor.
