Determination of triptonide by cloud point extraction combined with MEKC

Area of Science:

• Analytical Chemistry
• Pharmacognosy
• Chromatography

Background:

• Tripterygium wilfordii Hook F. is a traditional Chinese herb containing bioactive compounds.
• Triptonide is a key active component requiring accurate quantification.
• Existing analytical methods may lack sensitivity or efficiency for triptonide determination.

Purpose of the Study:

• To develop and validate a sensitive method for triptonide determination.
• To combine cloud point extraction with micellar electrokinetic capillary chromatography (MEKC).
• To analyze triptonide in Tripterygium wilfordii and biological matrices.

Main Methods:

• Cloud point extraction utilizing Triton X-114 micelles at pH 3.0.
• Sample preparation involving dilution with ethanol to reduce viscosity.
• Separation and quantification using micellar electrokinetic capillary chromatography (MEKC).

Main Results:

• Achieved an enrichment factor of 25 for triptonide.
• Determined a low limit of detection of 3.15 x 10(-7) mol/L.
• Successfully applied the method to T. wilfordii tablets and spiked urine samples.

Conclusions:

• The developed method offers efficient preconcentration and sensitive determination of triptonide.
• The combined cloud point extraction-MEKC technique is feasible and reliable for analyzing triptonide.
• This method provides a valuable tool for quality control and research involving Tripterygium wilfordii.