Ask the Produce Docs (Commodity)
Is there a standard method for measuring oil content in avocados? I have customers inquire about a device to do this all the time. (R.H.)
The standard protocol these days for determining maturity of avocados is using DRY WEIGHT not oil. There is a very close relationship between oil and dry matter. The switch for the California industry came in the mid-80’s when the protocol for oil determination, the Hallowax method, was deemed carcinogenic. Most industries now use dry matter although some industries will report in oil content since there is such a close correlation. They do this by generating a regression analysis and using the regression equation to determine oil after determining the dry matter.
Basically dry matter is very easy to determine. All you need is freshly harvested fruit, a scale that can measure to 0.01 g and a good microwave oven.
Sampling paper for current California method:
The “foundation” paper: