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Table 2 Calibration curves of the five investigated analytes

From: Simultaneous determination of five azadirachtins in the seed and leaf extracts of Azadirachta indica by automated online solid-phase extraction coupled with LC–Q-TOF–MS

Compound Regression equation r 2 Range (ng mL−1) LOD (ng mL−1) LOQ (ng mL−1)
Azadirachtin A y = − 861711·x2 + 5836597·x + 47030 0.9992 23.44–3000 0.45 1.35
Azadirachtin B y = − 2305665·x2 + 12766095·x − 121354 0.9992 18.75–1200 0.34 1.04
Azadirachtin D y = 591578·x2 + 4267977·x − 754 0.9998 3.12–800 0.76 2.30
Azadirachtin H y = 13670508·x2 + 5608355·x + 12303 0.9991 3.12–400 0.42 1.25
Azadirachtin I y = 11915995·x2 + 3434963·x + 4502 0.9996 3.12–200 0.46 1.40