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Price of the test:

$90 per analysis

Acceptable Matrices:

The method is applicable to a variety of food products, including cereals, snacks, dressings, and frostings.

Limit of Quantitation:

The lower detection level is 0.3 ppm (parts per million); with an upper limit of 50 ppm.

Sample Size Requirements:

20 grams


Gas Chromatograph with Flame Ionization detection

Reportable Units:

ppm (parts per million)

Turn Around Time:

10 Business days

Is Rush Available?


Method Reference:

Internally developed method

Method Description:

A homogenous portion of the sample is mixed with water containing an internal standard. It is heated in a heating block for a specified amount of time, after which a sample of the headspace over the mixture is taken and injected into the gas chromatograph. The hexanal released into the headspace is quantitated via comparison of the hexanal gas’s chromatographic response to that of the internal standard.

Information Required by Submitter:

The sample must be kept cool/cold to minimize fatty acid oxidation.

Additional Information:

Hexanal is a by-product of fatty acid oxidation and this method measures the amount of hexanal in food products and ingredients. Therefore, this gives a measurement of the level of oxidative rancidity for oil in a food product.