AOAC 991.36 — Fat (crude) in meat and meat products

What it measures

Crude fat content of meat and meat products by solvent extraction — the filter-bag workflow replaces classical crucible handling.

Application

Meat, feed and food laboratories running routine crude-fat determination alongside nitrogen/protein testing.

Method principle.

Filter-bag solvent extraction: samples are sealed in filter bags, solvent is added, then soaking, extraction and solvent recovery run as a batch process.

Listed in Sonnen's G100 application standards as "fat (crude) in meat and meat products". Confirm the current method text and scope in the AOAC compendium before compliance use.

Laboratory workflow.

Step 1

Bagging

The sample (0.1–5 g) is sealed in a 25 µm filter bag — 10 µm and 15 µm bags are optional.

Step 2

Solvent adding

Solvent is added automatically (G350, F22) or manually (G100, F20), then the bag is sealed for extraction.

Step 3

Extraction

Soaking and extraction run as an unattended batch — up to 15 samples on the G350, up to 10 on the G100.

Step 4

Recovery

Solvent is recovered at a rate of at least 90%; results are calculated per batch.

Relevant SONNEN instruments.

G100G100 Automated Filter-Bag Fat Extractor→ G350G350 Fully Automatic Filter-Bag Fat Extractor→

FAQ.

Which SONNEN instruments list AOAC 991.36?

The G100 filter-bag fat extractor lists AOAC 991.36 among its application standards. The G350 runs the same filter-bag extraction workflow with up to 15 samples per batch and automated solvent adding.

What is the measuring range of the G series?

The G-series specification lists a 0.1–100% measuring range, 0.1–5 g sample size and a solvent recovery rate of at least 90%.

Related standards & methods

Kjeldahl method AOAC 981.10

Working to AOAC 991.36?

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