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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: email@example.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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Identification of major components of traditional Chinese medicine Naodesheng tablet by HPLC-DAD-MS(n).[Pubmed: 22419461
To identify the major components of traditional Chinese medicine Naodesheng tablet.
METHODS AND RESULTS:
A HPLC-DAD-MS(n) based method was developed to analyze and identify the major components of Naodesheng tablet. Separation was performed on an Agilent Zorbax SB-C(18) column (4.6 mm X 250 mm, i.d, 5 μm) with mobile phase consisting of water with 0.05 % formic acid and acetonitrile as gradient eluent at the flow rate of 0.5 ml.min(-1).
A total of 43 components were detected, among which 22 were identified by comparing their UV absorption profiles, the information of molecular Glucosyl puerarin weights, and structures provided by ESI-MS(n) with those of available standards and reference data, such as Safflor yellow A, 4'-O-Glucosyl puerarin, 3'-hydroxypuerarin, Genistein-8-C-apiosyl (1-6) glucoside, Puerarin, 6"-O-xylosyl puerarin, 6"-O-apiosyl puerarin, 3'-methoxy puerarin, 3'-methoxy-6"-o-xylosyl puerarin, Daidzin, Genistin, Pueroside A, Notoginsenoside R(1), Ginsenoside Re, Ginsenoside Rg1,Daidzein,Biochanin A,Ginsenoside Rb(1), Ginsenoside Rc, Ginsenoside Rb(2), Ginsenoside Rb(3), Ginsenoside Rd.
The proposed method can identify the main components of Naodesheng tablet and provide information for the quality control of this medicine.
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