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Table 2 Calculated activation energies as a function of temperature

From: Effect of pH and concentration on the chemical stability and reaction kinetics of thiamine mononitrate and thiamine chloride hydrochloride in solution

pH Vitamin salt form Acid Concentration (mg/mL) Ea (kcal/mol) Ea (kJ/mol)
3 TMN HNO3 1 27.2 ± 0.3a 114 ± 1a
20 25 ± 1ab 103 ± 5ab
HCl 1 26.9 ± 0.3a 113 ± 1a
20 24.8 ± 0.5ab 104 ± 2ab
TClHCl HNO3 1 23.1 ± 0.4bc 97 ± 2bc
20 20.9 ± 0.3cd 87 ± 1cd
HCl 1 25.6 ± 0.3ab 107 ± 1ab
20 23.6 ± 0.5b 99 ± 2b
6 TMN HNO3 1 19 ± 1de 79 ± 5de
20 18 ± 1de 77 ± 5de
HCl 1 21 ± 1cd 87 ± 4cd
20 18 ± 1e 75 ± 5e
TClHCl HNO3 1 20. ± 1de 82 ± 5de
20 18 ± 1de 77 ± 5de
HCl 1 19 ± 1de 80. ± 5de
20 18 ± 1de 76 ± 5de
  1. Superscript letters denote statistical significance of Ea (down columns)
  2. Standard error of the slope was used for statistical calculations