[A study on the decomposition kinetics of vitamin C tablet].

Under the condition of relative humidity less than the critical relative humidity, the discoloration rate and decomposition rate of vitamin C tablet and the discoloration rate of vitamin C tablet in solution were studied at temperatures 60-90 degrees C and relative humidities 60%-80%. The general equation of the relationship between the apparent rate constant k, absolute temperature T and relative humidity RH is: k = k' exp(-E/RT) exp(mRH), where k' and m are constants, E is apparent activation energy. The values of k', m and E for discoloration, decomposition and discoloration in solution are different.