Total Nitrogen

Liquids

1. Mix sample in container and place representative sample in tared Kjeldahl digestion tube. Weigh 5 g of sample. Use 5.000 in the calculation on the control unit. Follow procedure for nitrogen determination for feed samples.
2. Report to 3 decimal places.

Solids

1. Run nitrogen according to feeds procedure.
2. Calculation for ammonia determination and total nitrogen.
3. %NH₄-N or %Total N = 1.401 x N H₂SO₄ x (mL acid)/sample wt (g)