The Fertilisers (Sampling and Analysis) Regulations 1996

“10.    EXPRESSION OF RESULTS

The percentage of boron in fertiliser is given by:

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where:

• B(%) is the percentage of boron in the fertiliser;

• x₁ is the volume, in ml, of the 0.025 M sodium hydroxide solution (4.4);

• x₀ is the volume, in ml, of the 0.025 M sodium hydroxide solution M (4.4);

• F is the boron (B) value, in mg/ml, of the 0.025 M sodium hydroxide solution (4.4);

• V is the volume, in ml, of the extract solution obtained in accordance with Method 26a or 26b;

• a is the volume, in ml, of the aliquot portion (7.1) taken from the extract solution (6.1);

• M is the mass, in grams, of the test sample taken in accordance with Method 26a or 26b.