Abstract: The measurement of the particle size distribution of an aerosol is of crucial importance in pharmaceutical development. A prerequisite for this is a valid method, e.g. the cascade impactor method described in the pharmacopoeias. It requires measurement of the active substance concentration in order to determine the particle size distribution. The invention provides a process which makes it possible to measure the size of aerosol droplets containing pharmaceutical substances which are unstable in the event of changes in the pH.

Abstract: Methods are provided for glucose detection and quantification in urine. The methods include selecting a test device comprising a matrix impregnated with a chromogenic indicator mixture, locating the test device to promote incidental contact of same with animal urine, reading a developed indicator color after the device has been wetted with urine, and determining the animal's urine glucose concentration.

Abstract: Methods of measuring free and total chlorine content in solutions are provided without lowering the pH of the solution to the acid range by modifying a solution containing chlorine and water to contain a proton donating compound and electrochemically measuring the concentration of the chlorine in the solution. An additional potassium iodide reagent is added when total chlorine content is measured. Stable aqueous reagent solutions useful in automated chlorine analyzers which contain sodium bicarbonate, a base, and water or borax, water, and acid are also described. Finally, apparatuses for detecting the level of chlorine in water samples utilizing an automated chlorine detector, a cartridge having a solid proton donating compound, and optionally a standpipe are discussed.

Abstract: A visual blood glucose test strip has two membranes that each incorporate a reagent that reacts with glucose in a blood sample applied to the membranes to cause a color change. One of the membranes also includes an inhibitor and a dye. A blood sample applied to the strip causes the two membranes to form two different colors. Comparing the colors to a calibrated color chart permits a user to determine the glucose concentration in the blood sample.

Abstract: Devices and test kits are provided for glucose detection and quantification in urine. The devices and kits comprise a chromogenic indicator mixture comprising a first indicator capable of color development to indicate the presence of a low-to-medium concentration of glucose, a second indicator capable of color development to indicate the presence of a higher concentration of glucose, wherein the first indicator prevents color development of the second indicator unless the higher concentration of glucose is present in the urine, and a non-chromogenic scavenger that interferes with color development of the first indicator when glucose levels are below a threshold concentration, and a carrier impregnated with the chromogenic indicator mixture.