The method can also determine {HEAD ~ calibration coefficients} for unknown calibration standards by extracting {TAIL ~ the calibration} coefficients from the optimized models 
by extracting
The method can also determine { HEAD ~ calibration coefficients } for unknown calibration standards by extracting { TAIL ~ the calibration } coefficients from the optimized models
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH