Abstract
Nonisothermal stability tests have been proposed as an attractive and alternative method to the conventional isothermal stability tests. The stability and the degradation properties of famotidine and nizatidine were investigated using both isothermal and nonisothermal stability test techniques. Linear and logarithmic temperature programs were used and the degradation rate constant and activation energies were calculated using a computer program, which was written in basic. Also the advantages and disadvantages of these temperature programs are compared. The method to estimate parameters is based on nonlinear curve fitting the nonisothermal concentration–time–temperature curve equation. The nonisothermal stability test results were compared with the results of isothermal stability tests and similar results were obtained.
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