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Related Experiment Videos

Sulfuric acid/hydrogen peroxide digestion and colorimetric a collaborative study.

D K Christians1, T G Aspelund, S V Brayton

  • 1Hach Co., Loveland, CO 80539.

Journal - Association of Official Analytical Chemists
|January 1, 1991
PubMed
Summary

A new colorimetric method accurately determines phosphorus in various meat products. This validated method offers reliable results comparable to existing standards, enhancing food analysis.

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Area of Science:

  • Food Chemistry
  • Analytical Chemistry
  • Agricultural Science

Background:

  • Accurate determination of phosphorus is crucial for nutritional labeling and quality control in meat products.
  • Existing analytical methods may require optimization for efficiency and accuracy across diverse meat matrices.

Purpose of the Study:

  • To collaboratively study and validate a new colorimetric method for phosphorus determination in meat and meat products.
  • To assess the method's performance across various meat types and compare it with an established AOAC method.

Main Methods:

  • Samples digested using sulfuric acid and hydrogen peroxide.
  • Phosphorus quantified via colorimetric analysis of the digest.
  • Collaborative study involving seven laboratories analyzing six classes of meat products.

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Main Results:

  • The method demonstrated linear calibration from 0.05% to 1.00% phosphorus.
  • Repeatability and reproducibility relative standard deviations ranged from 1.70% to 9.87%.
  • Statistical analysis showed no significant difference compared to the AOAC method 24.016.

Conclusions:

  • The proposed colorimetric method is reliable and accurate for phosphorus determination in meat.
  • The method has been officially adopted by AOAC as first action.
  • This validated method provides a robust alternative for food analysis laboratories.