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Total phospholipid analysis in human milk without acid digestion
The American Journal of Clinical Nutrition
|May 1, 1985
Summary
A new colorimetric method accurately measures organic phosphorus in human milk without acid digestion. This method offers a reliable alternative for analyzing essential nutrients in breast milk.
Area of Science:
- Biochemistry
- Analytical Chemistry
- Nutritional Science
Background:
- Accurate quantification of organic phosphorus in human milk is crucial for infant nutrition.
- Traditional methods often involve acid digestion, which can be time-consuming and may alter sample composition.
Purpose of the Study:
- To develop and validate a novel colorimetric method for determining organic phosphorus in human milk.
- To assess the method's accuracy, reproducibility, and comparison with existing techniques.
Main Methods:
- A colorimetric assay was developed using human milk samples and phospholipid standards (phosphatidylcholine, phosphatidylethanolamine, sphingomyelin).
- Spectral and calibration curves were generated, and absorption maxima were determined.
- Reproducibility was assessed using total lipid samples, and recovery studies were performed with added phosphatidylcholines.
Main Results:
- The new method demonstrated equivalent spectral and calibration curves compared to phospholipid standards.
- Absorption maxima were observed between 720 and 740 nm.
- The method showed high reproducibility (coefficient of variation 3.8%) and excellent recovery rates (99.0-102.1%).
Conclusions:
- The developed colorimetric method provides a satisfactory and efficient alternative for organic phosphorus determination in human milk.
- This method eliminates the need for acid digestion, simplifying the analysis.
- Results are comparable to established methods, ensuring analytical reliability.