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Table 4 Recovery test of the five azadirachtins in the neem samples (n = 3)

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 Seed Leaf
Spiked (µg) Recovery (%) RSD (%) Spiked (µg) Recovery (%) RSD (%)
Azadirachtin A 150 99.9 0.04 70 100.9 0.53
300 86.1 3.23 140 87.9 4.59
600 93.5 5.62 280 83.3 0.56
Azadirachtin B 25 93.4 8.11 5 95.9 6.19
50 87.8 2.79 10 98.9 3.40
100 83.1 1.38 20 93.4 1.89
Azadirachtin D 14 85.6 3.39 0.7 93.8 7.03
28 91.9 3.81 1.4 95.7 1.06
56 97.2 1.02 2.8 83.9 3.71
Azadirachtin H 10 90.4 4.73 2 102.8 6.83
20 82.0 3.25 4 92.1 2.26
40 83.4 1.80 8 88.2 1.34
Azadirachtin I 4.5 102.8 3.60 1.25 99.5 3.35
9 90.6 3.27 2.5 95.9 2.55
18 94.0 3.93 5 85.7 1.43