A Reliable Method for a Bile Acid

This Deoxycholic Acid Assay produces Run to Run consistency and Precision with Retention Time RSD values of 0.1%. A sensitive HPLC-UV Method that may be used for quantification in raw material and liquid pharmaceutical formulation is presented.

Figure 1.
Full Chromatogram

Figure 2.
Magnified Chromatogram to show peak of interest

 

Peak:

Deoxycholic Acid

Method Conditions:
Column: Cogent Bidentate C18™, 4um, 100Å
Catalog No.: 40018-15P
Dimensions: 4.6mm x 150mm
Mobile Phase:
A: DI Water
B: 20:80 Acetonitrile / Buffer (50mM KH2PO4 pH adjusted to 7.5)
C: Acetonitrile

Time (minutes) A B C
0 55% 20% 25%
2 55% 20% 25%
2.05 48% 20% 32%
8 48% 20% 32%
8.05 20% 20% 60%
11 20% 20% 60%
11.05 55% 20% 25%
15 55% 20% 25%

Injection vol.: 100μL
Flow rate: 1.0mL / minute
Detection: UV @ 205nm
Column Temperature: 35°C
Sample Preparation: Deoxycholic Acid 50μg / mL in DI Water

Note: Deoxycholic Acid also known as Cholanoic Acid and sometimes sold as Kybella™ or Belkyra™, is one of the secondary bile acids, which are metabolic byproducts of intestinal bacteria and can be used to determine intestinal fat adsorption. Another research application is when a micelle is formed with it, it can used as a mild detergent for the isolation of membrane proteins.

This Method was developed by and is presented courtesy of ARL- Eutech Scientific Services.

 

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