Rutundic acid
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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J Sep Sci. 2005 Nov;28(16):2061-6.
Simultaneous determination of seven triterpenoids and triterpenoid saponins in Folium llicis Purpureae by high performance liquid chromatography coupled with evaporative light scattering detection.[Pubmed:
16318200]
METHODS AND RESULTS:
A new HPLC coupled with evaporative light scattering detection method was established for the simultaneous determination of seven triterpenoids and triterpenoid saponins in Folium Ilicis Purpureae traditional Chinese medicinal herb derived from the leaf of Ilex purpurea, namely, 3-omicron-beta-D-glucopyranosyl (1-->2)-beta-D-[6-omicron-methyl-glucuronopyranosyl]-28-omicron-beta-D-glucopyranosyl oleanolic acid (SQ-1), pedunculoside (SQ-2), 23-hydroxytormentic acid 28-omicron-beta-D-glucopyranoside (SQ-3), 23-hydroxytormentic acid (SQ-4), Rutundic acid (SQ-5), ilexoside B (SQ-6), and ursolic acid (SQ-7). The optimal chromatographic conditions were achieved on a C18 column with a linear gradient elution of mobile phase A: deionized water-isopropyl alcohol-THF-acetic acid (90:10:6:1, v/v) and B: methanol-isopropyl alcohol-THF-acetic acid (90:10:6:1, v/v) at the flow rate of 1.0 mL/min; temperature for drift tube was set at 98degreesC and nitrogen flow rate was 2.8 L/min. All calibration curves of the seven compounds showed good linear regression (r2 > 0.995) within test ranges. The developed method has good repeatability for quantitation of all analytes interested with overall intraday and interday variation of less than 4.1%. The LOD (S/N = 3) and LOQ (S/N = 10) were less than 0.13 and 0.26 microg/mL, respectively, for all analytes.
CONCLUSIONS:
The established method was successfully used to evaluate the quality of Folium Ilicis Purpureae samples of different collections.
