Abstract
Thermogravimetry was used to study the non-isothermal decomposition kinetics and the stability of porphyrin copper-sodium from ephedra. The kinetic equation for the second step can be expressed as\(d\alpha /(dT) = Ae^{ - \frac{{E_\alpha }}{{KT}}} 3/2(1 - \alpha )^{4/3} /[(1 - \alpha )^{ - 1/3} - 1]\). The kinetic compensation effect is found to be: InA=0. 2468E a −8. 0513.Ea is 206. 61 kJ/mol. The results show that porphyrin copper-sodium has a high activation energy and good stability.
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Biography: Zhang Lian-ru(1964), female, lecturer Research direction, applied biochemistry.
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Lian-ru, Z., Tian-ming, Y. & Guo-lin, Z. Application of thermogravimetry to study the kinetics and stability of porphyrin copper-sodium of ephedra. Wuhan Univ. J. Nat. Sci. 5, 357–360 (2000). https://doi.org/10.1007/BF02830156
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DOI: https://doi.org/10.1007/BF02830156