Intensity distribution plot of the 45 nm diameter nanoparticle standard at 1014 (green) and 1010 (red) mL−1 concentrations. It is apparent that at the lower concentration the scattered light intensity from other particles (e.g., impurities) becomes significant and the total light intensity needs to be corrected with the percentage stemming from the standards. At higher concentration however the peak of the standard particles is the dominant one and the total intensity of the scattered light can be used for calculation.
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