8. EXPRESSION OF RESULTS
The percentage of trace element (E) in the fertiliser is equal to:
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If method (25c) has been used:
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where:
E is the amount of the trace element determined, expressed as a percentage of the fertiliser;
xs is the concentration of the test solution (6.2), in μg/ml;
xb is the concentration of the blank solution (7.1), in μg/ml;
V is the volume of the extract obtained by Method 25a or 25b, in ml;
D is the factor corresponding to the dilution carried out in (6.2);
M is the mass of the test sample taken in accordance with Method 25a or 25b in grams.
Calculation of dilution factor D:
If (a1), (a2), (a3), . . ., (ai) and (a) are the aliquot portions and (v1), (v2), (v3), . . ., (vi) and (100) are the volumes in ml corresponding to their respective dilutions, the dilution factor D will be equal to:
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