Quantitative Analysis of Six Phenolic Acids in Artemisia capillaris (Yinchen) by HPLC-DAD and Their Transformation Pathways in Decoction Preparation Process
Table 3
Precision, repeatability, stability, and recovery of six phenolic acids.
No.
Analytes
Precision (RSD %)a)
Repeatability (RSD %, n = 6)
Stabilitya (RSD%, n = 6)
Recoveryb (%, n = 6)
Intraday (n = 6)
Mean
RSD%
1
5-Caffeoylquinic acid
0.06
0.10
0.57
104.64
0.22
2
3-Caffeoylquinic acid
0.27
0.10
1.31
105.10
0.34
3
4-Caffeoylquinic acid
0.25
0.04
1.14
102.82
1.82
4
1,3-Dicaffeoylquinic acid
0.21
0.09
0.45
98.76
1.39
5
3,4-Dicaffeoylquinic acid
0.46
0.84
1.34
103.45
1.79
6
4,5-Dicaffeoylquinic acid
0.29
0.99
2.62
99.68
1.27
aRSD (%) = (SD/mean) × 100. bRecovery (%) = 100 × (amount found – original amount)/amount spiked.
