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Table 1 Linearity curves, LOD and LOQ for six compounds

From: Characterization and determination of six flavonoids in the ethnomedicine “Dragon’s Blood” by UPLC-PAD-MS

Peak Compounds Linear equations Range (μg/mL) R 2 LOD (ng) LOQ (ng)
1 Dracorhodin y = 8580.5x + 8536.8 5-250 0.9998 0.48 1.60
2 4,6-Dihydroxy-2-methoxy-3- methyldihydrochalcone y = 6472.4x + 1430.2 1-50 0.9982 0.15 0.50
3 4,6-Dihydroxy-2-methoxy-3- methylchalcone y = 6529.5x - 2240.9 1-50 0.9999 0.52 1.73
4 (2S)-5,7-Dihydroxy- dihydroflavone y = 25710.1x + 14943.4 1-50 0.9989 0.06 0.20
5 (2S)-5-Methoxyflavan-7-ol y = 989.1x + 16685.5 20-1000 0.9992 0.83 2.76
6 (2S)-5-Methoxy-6-methyl- flavan-7-ol y = 4098.2x + 14161.0 5-250 0.9991 0.21 0.70