Fig. 3From: Effect of pH and concentration on the chemical stability and reaction kinetics of thiamine mononitrate and thiamine chloride hydrochloride in solutionReaction kinetics of thiamine degradation in pH 6 thiamine solutions: A first-order degradation regression lines of 1 mg/mL TMN solutions adjusted to pH 6 with HNO3 and NaOH at temperatures from 25 to 80 °C; and B Arrhenius plots used to calculate temperature-dependent activation energy for thiamine degradation in 1 and 20 mg/mL thiamine solutions adjusted to pH 6 with HNO3 or HCl and NaOH from 25 to 80 °CBack to article page