beta-Cyclodextrin methyl ethers
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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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Phytochem Anal. 2008 May-Jun;19(3):258-65.
High-performance liquid chromatography-electrospray mass spectrometry for the simultaneous determination of multiple active components in Sheng-Mai San, a prescription of traditional Chinese medicine.[Reference:
WebLink]
An advanced and reliable HPLC-MS method was developed for the simultaneous quantification of eight active components
(ginsenosides Rf, Rg2, Rg3, Rh1 and Rh2, gomisin A, methylophioponanone B and schizandrin) in Sheng-Mai San, a traditional
Chinese medicine.
METHODS AND RESULTS:
The elution of multiple components was performed using a C18 column with stepwise gradient elution. The
detection of individual analytes was monitored by electrospray MS scanning from 300 to 1000 m/z in the positive ion mode, with
the limits of detection of these components ranging from 0.06 to 1 μg/mL at a signal-to-noise ratio of ≥5. The intra- and inter-day
accuracies ranged from 95.1 to 104.4%, and the overall precision was less than 9.3%.
CONCLUSIONS:
The recoveries of the analytes were ≥96.6%.
The method was validated and found suitable for the determination of active components present in Sheng-Mai San preparation.
