Single-Laboratory Validation of a Two-Tiered DNA Barcoding Method for Raw Botanical Identification

Area of Science:

• Molecular Biology
• Botany
• Analytical Chemistry

Background:

• Deoxyribonucleic acid (DNA) barcoding is increasingly used for identifying botanical products.
• Validation of DNA barcoding methods is crucial for regulatory compliance in herbal medicine and dietary supplements.
• Current applications extend from animal product authentication to botanical identification.

Purpose of the Study:

• To provide a robust validation protocol for a two-tiered DNA barcoding method.
• To establish a reliable method for identifying raw botanicals.
• To ensure regulatory compliance for botanical product identification.

Main Methods:

• Computational validation of a barcode database for unambiguous botanical identification.
• Maximum variation sampling to capture diverse perspectives in experimental validation.
• Experimental validation using 22 authenticated botanicals from various plant parts and species.

Main Results:

• The two-tiered DNA barcoding method achieved 100% accuracy and a precision of 1.0.
• The method demonstrated ruggedness and acceptable uncertainty.
• Validated performance metrics support the reliability of the DNA identification technique.

Conclusions:

• The validated two-tiered DNA barcoding method is suitable for identifying botanical raw materials.
• This protocol offers guidance for manufacturers and regulators to implement compliant DNA-based testing.
• The study enhances quality control processes for botanical raw material authentication.