Process and catalyst for determining {TAIL ~ nitrogen} in {HEAD ~ a sample} according to the Kjeldahl principle 
Process and catalyst for determining { TAIL ~ nitrogen } in { HEAD ~ a sample } according to the Kjeldahl principle
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH