In this article:
An investigation was carried out to determine whether an alternative method could be found for obtaining estimations of the quantity of soil present in dried grapes which would provide reasonably accurate values and at the same time be rapid and not involve costly or fragile laboratory equipment used for previous methods.
The method described in the article fulfils these requirements.
The method involves washing sultanas, collection of soil on a fine sieve, separation of organic material from soil in saturated potassium carbonate solution and measurement of the column of soil collected in a narrow bore plastic tube.
A Rapid Method for the Determination of the Grit Content of Dried Vine Fruits
1968, Food Technology in Australia, vol 20, issue 5, month 5, pages 218 – 219
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