Related Experiment Videos
Collaborative study of assay method for erythromycin in pelleted feeds containing binding agents
Journal - Association of Official Analytical Chemists
|January 1, 1977
Summary
A new method improves erythromycin analysis in animal feed. This technique effectively extracts erythromycin (antibiotic) from feeds containing pelleting adjuvants like bentonite and Masonex, ensuring accurate results.
Area of Science:
- Analytical Chemistry
- Food Science
- Veterinary Medicine
Background:
- Erythromycin is a vital antibiotic used in animal feed.
- Pelleting adjuvants such as bentonite and Masonex can interfere with antibiotic analysis.
- Accurate quantification of erythromycin is crucial for animal health and regulatory compliance.
Purpose of the Study:
- To evaluate a modified analytical method for erythromycin in feed.
- To address challenges posed by pelleting adjuvants in feed matrices.
- To validate the method's reliability through collaborative study.
Main Methods:
- A modified extraction procedure involving an aqueous methanolic pH 8 buffer presoak.
- Pre-treatment to release erythromycin from binding agents (bentonite, Masonex).
- Extraction of erythromycin using methylal.
Main Results:
- High recovery rates for erythromycin in both mash and pellet feed forms.
- Recovery values ranged from 86.6% to 103.0% of theoretical values.
- A grand mean recovery of 96.8% across six different sample types.
Conclusions:
- The modified method provides accurate and reliable analysis of erythromycin in feeds.
- The method effectively overcomes interference from bentonite and Masonex.
- This validated method has been officially adopted for first action analysis.