A rapid method for the measurement of plasma glucose concentration

A modification of the manual glucose oxidase-gum guaiacum method of Shipton, B., Wood, P.J. and Marks, V. ((1975) Med. Lab. Tech. 32,33), for use with plasma, is described. The method enables rapid measurement of plasma or serum glucose concentration between 1 and 22 mumol/1 using 10 mul of sample and a single colour reagent. Experience of the method in routine use has shown that the coefficient of variation, beteen batch, is 2.1% and the time taken for analysis of 1 sample, standards and a quality of control sample is 12 min (including centrifugation of blood to obtain plasma).