A semiautomated micromethod for dextran in the presence of glucose

A semiautomated method for microanalysis of dextran with anthrone reagent has been developed. The method utilizes the Technicon inulin manifold and other standard AutoAnalyzer equipment. Since the anthrone method is sensitive to plasma glucose, a glocuse oxidase method which eliminates glucose in samples to be analyzed for dextran has also been developed. When solutions containing 50 mg. per 100 ml. of dextran were compared to solutions containing 50 mg. per 100 ml. of dextran plus up to 200 mg. per 100 ml. glucose, no significant difference was observed. The coefficient of the anthrone-glucose oxidase method is 0.039, which is within the error of the AutoAnalyzer itself.