Commission Regulation (EEC) No 2568/91 of 11 July 1991 on the characteristics of olive oil and olive-residue oil and on the relevant methods of analysis (c. 2568)

ANNEX XV U.K.

3. EXPRESSION OF RESULTS U.K.

3.1. Method of calculation and formula U.K.

(a)

The extract expressed as a percentage by mass of the product as received is equal to:

where:

S = is the percentage by mass of extract of the product as received, m0 = is the mass, in grams, of the test portion, m1 = is the mass, in grams, of the extract after drying.

Take as the result the arithmetic mean of the duplicate determinations, providing the repeatability conditions are satisfied.

Express the result to the first decimal place.

(b)

The extract is expressed on a dry matter basis by using the formula:

where:

S

=

is the percentage of extract by means of the product as received (see (a)),

U

=

is its moisture and volatile matter content.

3.2. Repeatability U.K.

The difference between the duplicate determinations carried out simultaneously or in rapid sucession by the same analyst shall not exceed 0,2 g of hexane extract per 100 g of sample.

If this condition is not satisfied, repeat the analysis on two other test portions. If, in this case too, the difference exceeds 0,2 g, take as the result the arithmetic mean of the four determinations.