A chemiluminescence automatic analyser for the measurement of biological compounds

A compact automated analyser which could analyse constituents in biological fluids with a small sample volume and in a short time has been developed. The instrument was composed of a flow injection analysis system equipped with chemiluminometric detection and an immobilized enzyme column reactor used in combination. Chemiluminescence has high sensitivity, and its reaction proceeds very quickly. Furthermore, an immobilized enzyme column reactor can produce a sufficient amount of hydrogen peroxide from compounds in serum in a short time. When enzymes are used as reagents for the analysis of substances in blood or blood serum, the final signals emitted by different enzyme reactions are usually not only hydrogen peroxide but also ammonia, NAD(P)H and so on. However, the practical chemiluminescence method for ammonia and NAD(P)H has not been established. We have discovered a new practical method for ammonia and NAD(P)H using an enzyme column reactor consisting of both immobilized L-glutamate dehydrogenase and L-glutamate oxidase. The determinations of glucose and uric acid in serum by chemiluminometry after production of hydrogen peroxide by the respective oxidases are presented. A newly chemiluminometric determination of ammonia, NAD(P)H and its applications to other enzymatic analyses that give ammonia and NAD(P)H as a final signal are also described.