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Validation of a column liquid chromatographic method for phytate.

Donald Oberleas¹, Barbara Harland

¹Texas Tech University, 3408 88th St, Lubbock, TX 79423, USA. doberlea@aol.com

Journal of AOAC International

|January 16, 2008

Summary

This study details a robust column liquid chromatography method for analyzing phytate and inositol phosphates in food and seeds. The method demonstrated reliable results across multiple laboratories, ensuring accurate quantification of these important compounds.

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Area of Science:

Analytical Chemistry
Food Science
Biochemistry

Background:

Phytate and inositol phosphates are crucial compounds in food and seeds.
Accurate analytical methods are needed for their quantification.
Existing methods may lack specificity or require complex procedures.

Purpose of the Study:

To describe and validate a column liquid chromatographic method for analyzing phytate and inositol phosphates.
To assess the method's performance and transferability to other laboratories.
To provide a reliable analytical tool for food and seed analysis.

Main Methods:

Utilized column liquid chromatography with a spectrophotometric detector.
Employed a postcolumn sulfosalicylic acid reaction for detection.
Optimized reagent pH for selective complexation and detection of phosphate esters.

Main Results:

The method was thoroughly tested and validated across six independent laboratories.
A standard wheat bran sample with a known phytate value (3.2%) was used for comparison.
The method demonstrated good sensitivity, ranging from 8-12 nmoles/injection.

Conclusions:

The described column liquid chromatographic method is effective for analyzing phytate and inositol phosphates.
The method's successful inter-laboratory validation indicates its robustness and reliability.
This analytical approach offers a valuable tool for researchers and industries working with foodstuffs and seeds.