Such assays may be used to detect {HEAD ~ the presence} of or to quantitate {TAIL ~ the amount} of the organic compound in a complex and varied immunological background such as a sample of a biomass material 
to quantitate
Such assays may be used to detect { HEAD ~ the presence } of or to quantitate { TAIL ~ the amount } of the organic compound in a complex and varied immunological background such as a sample of a biomass material
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH