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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Determination of salicin and related compounds in botanical dietary supplements by liquid chromatography with fluorescence detection.

A sensitive and reliable method is described for quantitative determination of salicin (including salicyl alcohol) and salicylic acid in botanical dietary supplements by reversed-phase liquid chromatography (LC) with wavelength-programmed fluorescence detection. One gram sample material was extracted with 20 mL aqueous phosphate buffer (pH 5.0), which was heated in an 80 degrees C water bath for 30 min. After centrifugation and cooling of the extract to room temperature, the supernatant was diluted with additional buffer. A 1 mL portion of diluted extract was mixed with 1 mL beta-glucosidase solution (2 mg/mL) and incubated for 40 min in a 37 degrees C water bath. The extract was passed through a 0.45 micron syringe filter and analyzed by LC. Limits of quantitation for salicin and salicylic acid were 20 and 1 microgram/g, respectively. Recoveries from samples fortified with salicin at 20, 100, and 1000 micrograms/g and with salicylic acid at 5, 20, and 50 micrograms/g ranged from 85 to 110%, with standard deviations less than 7%.[1]

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