Fig. 1. The concentration (mg/L) of riboflavin in microbeads formed by the internal
(d) and external (s) method. The final concentration of riboflavin within
microbeads is expressed as a function of the initial ratio of riboflavin to protein
(mg:g) in solution. The ratio of riboflavin to protein for the internal method is the
ratio of riboflavin (mg) to the grams of protein in the microbead forming solution.
The ratio of riboflavin to protein for the external method is the ratio of riboflavin
(mg) dissolved in an aqueous phase to the grams of microbead protein submerged
in the riboflavin solution.