Glucose in Freshwater of Central Amazon Lakes: Natural Substrate Concentrations Determined by Dilution Bioassay

A bioassay method has been employed to measure concentrations of glucose in the Central Amazon lakes. Michaelis-Menten enzyme kinetics parameters from the 14 bioassay measurements were made during this study. Concentrations of glucose found in Lago Tupé (10–485 μg/1)., Lago Cristalino (8–393 μg/1). and Lago Janauari (1-485 μg/1). are greater than anticipated. The bioassay method is applicable in determining concentrations of glucose in freshwater of the Central Amazon.