Abstract: The invention involves apparatus, reagents, and methods for determining a disinfecting effective amount of hypochlorite in a sample. These involve using enough neutralizing agent sufficient to neutralize up to, but no more, than 0.525%, or 5250 parts per million, of hypochlorite in a sample. If more than this amount is present in the sample, then an indicator system reacts with it to provide a detectable signal, such as color. If the hypochlorite is present at less than 0.525%, no signal forms. One can determine this in two minutes or less.

Abstract: A stable reagent for assaying an analyte from a fluid sample which includes an enzyme, a mediator, a tetrazolium salt and an oxidizing agent selected from the group consisting of sodium chlorate, 2,5-dimethylhexane-2,5-dihydroperoxide, benzoyl peroxide, t-butyl peroxide, sodium iodate, N-ethylmaleimide, t-butylperoxyacetate, nickel acetylacetonate, stannic chloride, rhodium (III) trichloride hydrate, and t-butylperbenzoate is described. Inclusion of an oxidizing agent from the group specified above stabilizes the reagent, thereby preventing a high blank reaction because a high blank introduces error into the assay of an analyte. The reagent may be provided in solution form by adding water, or may be included in a film by adding a film-forming agent. The reagent may be utilized to perform the assay of an analyte from a fluid sample.

Abstract: Control reagents an oxidant or a hydroxylamine compound together with other ingredients, the most important of which is a known amount of the analyte for which the reagent acts as a control.

Abstract: The invention relates to a non-serum based control reagent for glucose determination. Rather than using modified serum, the control reagent contains water, glucose, and the viscosity agent polystyrene sulphonate. The control reagent may also contain a buffer, preservatives, surfactants or surface active agents. A method of making the control reagent is also disclosed.