Dyer's greenweed (Genista tinctoria) LC

[[File:|thumb|Yellow Botanic Gardens]]

Description

The Genista tinctoria is called dyer’s greenweed or dyer's broom. It is a variable deciduous shrub growing to 60–90 centimetres (24–35 in) tall by 100 cm (39 in) wide, the stems woody, slightly hairy, and branched. Golden yellow pea-like flowers are borne in erect narrow racemes from spring to early summer.

Analytical instrumentation and procedures

HPLC-DAD-MS analysis was performed with an Agilent 1100 liquid chromatography system consisting of an automatic injector, a gradient pump, a HP series 1100 DAD, and an Agilent series 1100 VL on-line atmospheric pressure ionization electrospray ionization mass spectrometer. Separations were done on a Vydac 214TP52 analytical column (2.1 mm diameterX250 mm; 5-ím particle size). The column was eluted at a flow rate of 0.2 mL/min with a tertiary gradient of water (A),acetonitrile (B), and 1% (v/v) aqueous formic acid (C) with the following elution program: 0 min, 90% A, 5% B, 5% C; 0-55 min, a linear gradient to 35% A, 60% B, 5% C; 55-60 min, a linear gradient elution to 15% A, 80% B, 5% C; 60-62 min, isocratic elution at 15% A, 80% B, 5% C; 62-70 min gradient elution to 90% A, 5% B, 5% C; and reequilibration with the latter solvent for 15 min. The mass spectrometer was run both in the negative and positive ion mode.

Chromatograms

Absorbance at 350nm (mAU)

Sample information

sample information, By R. A. Laursen, Boston University

Identified compounds

Luteolin UV-Vis

Genistein UV-Vis

Compound	RT (min.)	MW	UV/vis	Other
Luteolin	36.1	286	348	Comments here
Genistein	38.7	270	338
x	x	x	x
x	x	x	x

References

[1] [2] [3]