{HEAD ~ An antimonate}, such as {TAIL ~ potassium antimonate}, is used as the destruction catalyst in nitrogen determinations according to the Kjeldahl principle 
{ HEAD ~ An antimonate } , such as { TAIL ~ potassium antimonate } , is used as the destruction catalyst in nitrogen determinations according to the Kjeldahl principle
HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH