Objective: To study the genuine of 32 samples of Niuxi from 14 provinces, and compare some samples stored for different time to check the change in the coures of store.
Method: IR spectroscopy and Analyze Technology Auxiliary softeare.
Result: The coefficient correlations had certain difference among these Niuxi from different places. They were divided into two parts if r = 0.9840 the standerd: trueborn crude drugs (r > 0.9840) and non-trueborn (r < 0.9840). And we can know the change in medicinal materials according r.
Conclusion: The method is operated simple and determined fast; the result is reliable; repetitiveness is good.
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