Kjeldahl Catalyst Tablets K₂SO₄ + CuSO₄·5H₂O

Tablets for accelerating acid digestion in the Kjeldahl method. Potassium sulphate and copper sulphate combined in fixed proportions — consistent addition guaranteed across every digestion.

Composition per tablet

• K₂SO₄: 3.6 g — raises the boiling point of H₂SO₄, accelerates mineralisation
• CuSO₄·5H₂O: 0.4 g — catalyst for organic matter oxidation
• Nitrogen content: 20 ppm per tablet

Application

Kjeldahl digestion for total nitrogen determination in foodstuffs, animal feed, soils, wastewater, and biological materials. Tablet format eliminates individual weighing of reagents, reducing both preparation time and operator error.

The nitrogen contribution of 20 ppm per tablet must be accounted for when calculating the method blank — particularly relevant for low-protein samples.

Technical data

• K₂SO₄ per tablet: 3.6 g
• CuSO₄·5H₂O per tablet: 0.4 g
• Nitrogen per tablet: 20 ppm
• Format: Tablet
• Method: Kjeldahl (digestion)

Method compatibility

Compatible with standard Kjeldahl digestion tubes, digestion block, or classical flask setup. Suitable for subsequent distillation and titration in food analysis, environmental testing, and quality control.