TABLE 4.

Recovery of tetramethylpyrazine, ferulic acid, nodakenin, isoimperatorin in Chuanxiong Chatiao powder.

Component	Content in the sample (ng/ml)	Amount of control product added (ng/ml)	Measured value (ng/ml)	Recovery rate (%)	RSD (%)
Tetramethylpyrazine	7.44	3.70	11.16	100.54	1.07
	7.69	3.70	11.42	100.81
	7.31	3.70	11.00	99.73
	7.38	7.40	14.58	97.30
	7.52	7.40	14.87	99.32
	7.64	7.40	14.95	98.78
	7.43	11.10	18.36	98.47
	7.47	11.10	18.47	99.10
	7.35	11.10	18.40	99.55
Ferulic acid	831.81	420.51	1,251.03	99.69	1.75
	843.74	420.51	1,260.30	99.06
	840.97	420.51	1,250.71	97.44
	855.39	841.02	1,725.30	103.44
	850.65	841.02	1,706.12	101.72
	861.93	841.02	1,701.77	98.86
	847.20	1,261.53	2,100.04	99.31
	856.55	1,261.53	2,108.56	99.25
	860.12	1,261.53	2,117.93	99.71
Nodakenin	3,197.99	1,623.85	4,824.38	100.16	0.67
	3,207.41	1,623.85	4,832.48	100.07
	3,194.63	1,623.85	4,821.52	100.19
	3,216.41	3,247.70	6,524.01	101.86
	3,213.75	3,247.70	6,450.85	99.67
	3,220.24	3,247.70	6,498.51	100.94
	3,200.33	4,871.55	8,130.23	101.20
	3,245.17	4,871.55	8,126.18	100.20
	3,228.74	4,871.55	8,123.80	100.48
Isoimperatorin	14.31	7.25	21.74	102.48	1.84
	14.57	7.25	21.68	98.07
	14.43	7.25	21.78	103.17
	14.55	14.50	29.41	102.48
	14.60	14.50	29.14	100.28
	14.68	14.50	29.47	102.00
	14.54	21.75	36.03	98.80
	14.65	21.75	36.29	99.49
	14.48	21.75	36.16	99.68