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Table 1 The absorption maxima (λmax) in different extracts of O. stamineus leaves from UV-Vis and the value of extraction factor (EF)

From: Selected metabolites profiling of Orthosiphon stamineus Benth leaves extracts combined with chemometrics analysis and correlation with biological activities

Extracts wavelength (λmax) Extraction Factor (EF) ± SD
* meoh-s 329 136.29 ± 0.10
  286 122.85 ± 0.56
* mw-s 328 142.49 ± 0.05
  283 158.25 ± 0.07
* etoh-s 329 107.29 ± 0.02
  283 119.66 ± 0.16
* ew-s 331 108.61 ± 0.01
  284 110.79 ± 0.08
* water-r 329 135.38 ± 0.04
  284 136.77 ± 0.02
* meoh-m 331 125.02 ± 0.02
  285 113.96 ± 0.01
* mw-m 328 161.88 ± 0.01
  283 186.98 ± 0.05
* etoh-m 332 264.83 ± 0.02
  286 228.31 ± 0.05
* ew-m 329 167.21 ± 0.24
  286 135.01 ± 0.05
* water-m 279 104.17 ± 0.01
  1. *meoh-s = methanol soxhlet; mw-s = methanol:water (1:1) soxhlet; etoh-s = ethanol soxhlet; ew-s = ethanol:water (1:1) soxhlet; water-r = water reflux; meoh-m = methanol maceration; mw-m = methanol:water (1:1) maceration; etoh-m = ethanol maceration; ew-m = ethanol:water (1:1) maceration; water-m = water maceration