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New brine saturation for extraction of light filth from corn meal: collaborative study
Journal - Association of Official Analytical Chemists
|January 1, 1981
Summary
A new, safer method for corn meal analysis has been developed using common household ingredients. This improved technique efficiently extracts light filth, offering comparable results to the official method while avoiding toxic solvents.
Area of Science:
- Food science
- Analytical chemistry
- Microscopy
Background:
- Current methods for light filth extraction in corn meal often rely on toxic and expensive solvents.
- There is a need for safer, more accessible, and cost-effective analytical techniques in food safety.
Purpose of the Study:
- To develop and validate an improved method for extracting light filth from corn meal.
- To compare the efficacy of the proposed method against the official method (44.042) in terms of recovery rates for insect fragments and rodent hairs.
Main Methods:
- The proposed method utilizes readily available substances: tap water, salt, olive oil, and alcohol.
- Extraction is performed without the need for hazardous or costly chemical solvents.
- Collaborative testing involving 8 participants was conducted to assess method performance.
Main Results:
- The improved method achieved a 95.8% recovery rate for insect fragments, compared to 90.6% for the official method.
- Rodent hair recovery was 84.3% with the proposed method, versus 88.6% with the official method.
- The method demonstrated comparable or superior recovery rates for key indicators of light filth.
Conclusions:
- The developed method offers an effective and safer alternative for light filth extraction in corn meal.
- Its reliance on common ingredients makes it a practical and economical choice for food analysis.
- The method has been officially adopted as a first action method for corn meal analysis, replacing the previous official method.