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Fat by Gas Chromatography Test

  • Price

    $250 per analysis

  • Turnaround time

    7 - 9 Business Days

  • Rush


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Fat by Gas Chromatography Test

Technical data sheet


Method description

This analysis defines the breakdown of fat in terms of Total Fat, Saturated Fat, Monounsaturated Fat, Polyunsaturated Fat and Trans Fat. Total fat is reported as triglycerides; saturated, monounsaturated and trans fat are reported as fatty acids (as per NLEA regulations). Lipids are extracted from food stuffs by conventional Mojonnier techniques. The resulting residues are then transesterified to form fatty acid methyl esters (FAMEs). The FAMEs are then quantitated using capillary column gas chromatography.

Acceptable matrices

Food and Food Ingredients

Unacceptable matrices

Paprika oil, gums

Limit of quantitation



Gas Chromatograph with Flame Ionization Detection

Method reference

AOAC 996.06 (see also 920.39C, 983.23, 933.05, 948.15 Fat in various food stuffs) House, S.D. et. al. JAOAC Intl, 77, No. 4 (1991), 960. DeVries, J.W. JAOAC Intl, 82, No 4 (1999), 1146

Reportable unit


Sample size requirements

5 g

Information required by submitter

For efficiency in processing your sample for analysis, please let your customer service representative know if your sample contains a large percentage of any one particular fatty acid.

Additional information

This test is ISO/IEC 17025 accredited through A2LA, Certificate # 2769.01. The testing method assumes the presence of fat as a triglyceride and calculates total fat using the measured FAME values and an assumed glycerin backbone. As the method is designed to measure triglyceride content, the accuracy of the total fat value may be affected in samples containing significant levels of monoglycerides, diglycerides and phospholipids. There are two Fat tests which should be ordered for Dairy products with regard to food labeling. The first test is Fat by Gas Chromatography which is used for the Nutrition Facts Panel values for listed fats. The second test is Fat Dairy which is total fat determined by the Roese-Gottlieb official method (gravimetric). This Fat Dairy, Roese-Gottlieb, method is required by the Code of Federal Regulations (CFR) for use in labeling milk-fat content. This would be for the (skim, whole, low, etc.) labeling claim for milk fat that goes on the front of the product package. This method includes specific calculations appropriate for nutrition labeling under the NLEA regulations. Total fat is calculated as triglycerides. The sum total of Omega 3 fatty acids DHA and EPA are calculated separately and highlighted in this report.

*Prices and offerings are subject to change without notice.

Common Fat by Gas Chromatography 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.

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Medallion Labs

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