Skip to main content

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