{TAIL ~ A cuvette} has been used to exemplify one embodiment of the invention involving a flow through {HEAD ~ system} 
{ TAIL ~ A cuvette } has been used to exemplify one embodiment of the invention involving a flow through { HEAD ~ system }
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD