Add a DA WN® photometer to your GPC line and you'll be able to determine absolute molecular weights and sizes of unknown polymers in minutes. 
Absolute macromolecular characterization with no calibration or reference standards 
Injector H GPC 	~ DAWN Model F 	Refractive Index Detector 
	Columns 	(flow) 
		GPC Detector 	Analog/Digital Interface 
Know more aboul your 
molecules 
The DAWN Flow photometer determines absolute molecular weights (~1 000 to 
> 100,000,000 daltons), root mean square (rms) molecular sizes, and shapes (rods, spheres, or random coils) of almost any polymer within minutes after your 
samples elute from your GPC system. 
Zimm plots are now 	Cost EHective 
trivial 	A completely configured DAWN 
	The DAWN Batch and Flow units 	GPC system costs less than $50,000. 
measure and collect the scattered 	Contact us for a complete 
light intensities from several 	information package, and join the 
concentrations of your sample- then 	hundreds of labs that have already 
Wyatt Technology's AURORA~' 	bought or rented a DAWN. 
software package (which runs on 
aoy IBM-PC.", oampa'ible) e Wyatt; 
constructs Zlmm plots to 		ffi h 
calculate obsolute molecular 		ec nelegy 
	. h 	doo 	~ 	CORPORATION 
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vJrlal coeffiCients in a matter of 		820 E. Haley Street, Santa Barbara, CA 93103 
seconds. 		(80S) 963-5904 FAX: (805) 965-4898 
<l:> 1990 WyaN Technology 
 HPLC Pump 
	Personal Computer 	I 
At the DAWN's heart, a multi-angle defee/or array surrounds the sample cell. Thousands 
of measurements per second provide precision and reproducibility. 
No calibration or reference standards needed Every quontity defined by light scattering is measured experimentally rather than calculated empirically or heoretically. You can spend more time analyzing and interpreting your data instead of repeating column calibration experiments. 

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