Figure 6From: A selective pretreatment method for determination of endogenous active brassinosteroids in plant tissues: double layered solid phase extraction combined with boronate affinity polymer monolith microextractionComparison of extraction performance between the methods of DL/SPE-LLE and DL/SPE-BA/PMME. (A) O. sativa leave samples (1 g FW spiked with five BRs at 2 ng for each BR) treated with DL/SPE-LLE method; (B) O. sativa leave samples (1 g FW spiked with five BRs at 2 ng for each BR) treated with DL/SPE-BA/PMME method. (C) Standard sample (1 mL sampling solution spiked with 5 BRs at 2 ng for each BR) extracted with boronate affinity monolith.Back to article page