Preliminary Studies on Liquiritin, Deoxyschizandrin, and Tanshinone II A as Potential Anti-Neurodegenerative Disease Agent: Determination by Reverse-Phase Liquid Chromatography in Tianwang Buxin Pills

Table 7

The stability test results (n = 6).

Time	Peak area
	Liquiritin	Deoxyschizandrin	Tanshinone II A
0 h	438.41	349.33	927.68
2 h	445.9	344.85	933.49
4 h	440.9	345.62	945.12
8 h	438.23	337.05	930.59
12 h	441.56	348.9	907.35
24 h	430.28	341.93	898.63
Mean	439.21	344.61	923.81
RSD (%)	1.18	1.34	1.88

Temperature: 25°C; RH: 40%.