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Table 1 Comparison of the precision and extraction efficiency of SALLE with UAE–SPE

From: Preparative HPLC for large scale isolation, and salting-out assisted liquid–liquid extraction based method for HPLC–DAD determination of khat (Catha edulis Forsk) alkaloids

Protocol Norephedrinea (µg/g) % RSD Cathinea (µg/g) % RSD Cathinonea (µg/g) % RSD
SALLE 96 ± 9.1 9.5 1210 ± 120 9.9 1560 ± 190 12.2
UAE–SPE 170 ± 12 7.6 1290 ± 68 5.3 1400 ± 94 6.71
  1. aValues are represented by mean ± SD (n = 4); RSD relative standard deviation