Grade 609 Kjeldahl Weighing Boat 609 Kjeldahl weighing boat Excellent for weighing and transferring Kjeldahl samples securely and reliably. Dissolves residue-free in the digestion solution without influencing the analytical results in any way. Made from very low nitrogen parchment paper without any glue or additives. Transfer samples without loss by simply dropping the entire weighing boat containing the sample into the acid solution in the Kjeldahl flask/digestion tube. The fastest and most reliable way to transfer Kjeldahl samples.