Figures & data
Table 1. Chromatographic parameters of resolution, theoretical plate number, symmetry factor, and peak purity of arecoline, synephrine, and norisoboldine in SMT on SCX and ZORBAX SB-C18 columns.
Figure 2. HPLC chromatograms of reference standards (A) and SMT sample (B) separated on an Agilent ZORBAX SB-C18 column (250 × 4.6 mm, 5 µm) (1: synephrine; 2: arecoline; 3: norisoboldine).
![Figure 2. HPLC chromatograms of reference standards (A) and SMT sample (B) separated on an Agilent ZORBAX SB-C18 column (250 × 4.6 mm, 5 µm) (1: synephrine; 2: arecoline; 3: norisoboldine).](/cms/asset/99d268ee-d36d-45a3-ae53-3141130d3178/iphb_a_637505_f0002_b.gif)
Figure 3. HPLC chromatograms of reference standards (A) and SMT sample (B) separated on an Agilent SCX column (250 × 4.6 mm, 5 µm) (1: synephrine; 2: norisoboldine; 3: arecoline).
![Figure 3. HPLC chromatograms of reference standards (A) and SMT sample (B) separated on an Agilent SCX column (250 × 4.6 mm, 5 µm) (1: synephrine; 2: norisoboldine; 3: arecoline).](/cms/asset/6c42d17f-1daf-4b03-893b-fa0ae9166b74/iphb_a_637505_f0003_b.gif)
Table 2. Accuracy and recovery of synephrine, arecoline and norisoboldine at different concentrations (n = 3).
Table 3. Determination of synephrine, arecoline and norisoboldine from 26 batches of SMT (n = 3).