Retention of the dyes inside the ALGPODES beads during dry storage conditions. Alginates were mixed with solutions containing o-Di, AAP/DHBS or TMB and the mixture of enzymes (GOx and HRP) in order to reach the appropriate final concentration. Beads were prepared dropping the appropriate alginate solution into 5mL of CaCl2 0.1M under constant magnetic stirring. Beads were submerged in 1mL of glucose 0.2mM.