EXPRESSION OF THE RESULT
8. Express the result as the percentage of nitrogen (N) contained in the fertiliser as received for analysis.
Variant (a): N% = (50 − A) × 0.7
Variant (b): N% = (50 − A) × 0.7
Variant (c): N% = (35 − A) × 0.875
Where A = millilitres of sodium or potassium hydroxide used for the titration.