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Ash Test

  • Price

    $25 per analysis

  • Turnaround time

    7 - 9 Business Days

  • Rush


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Ash Test

Technical data sheet


Method description

Samples are combusted at a high temperature. The remaining residue (ash) is cooled, weighed and reported as a fraction of the original sample weight.

Acceptable matrices

Food and Food Ingredients

Unacceptable matrices

Flammable, explosive, or carbonate compounds

Limit of quantitation

0.012% (w/w)



Method reference

AOAC 923.03 Ash of Flour

Reportable unit


Sample size requirements

10 g

Information required by submitter

Please supply estimates

Additional information

This test is ISO/IEC 17025 accredited through A2LA, Certificate # 2769.01. This method is applicable to nearly all foods and food-related products. Ash is composed of the minerals that are not combustible under the test conditions and include things such as salts, carbonates and silicates.

*Prices and offerings are subject to change without notice.

Common Ash Test Testing Questions

While our sales and customer service team are happy to answer general testing questions, consultations typically start at a rate of $250 per 30 minutes regarding the interpretation of reported test results or questions about our test methods. We cannot consult on regulations, tolerance limits, or claims.

We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.

Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.

Medallion Labs, a division of General Mills, offers multiple areas of expertise for analytical testing and product evaluation for the food and ingredient industry. Our areas of expertise include Chemical Analysis, Nutritional Analysis, Food Safety, Shelf Life Studies, Microbiology, Specialty Fibers, Physical Testing, Allergen Testing, as well as Product Evaluation (which includes Product Performance and Sensory Evaluation) and Technical Consulting/Method Development. Our methods are developed for the testing of food products and ingredients.

The sample is placed in a very hot oven to combust all organic matter. The leftover inorganic matter (ash), is weighed back and reported as a percent. This is needed to calculate Calories and Carbohydrates, and is sometimes used for certain global regulations.

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Medallion Labs

A food testing program designed with mid-market and enterprise food and ingredient manufacturers in mind.