Our results are reflective of the fact that we were analyzing, in effect,
initial data runs, but they nonetheless confirm some of the key physical
principles as described throughout this paper. In general, the trials using
sufficiently low concentrations (labeled ‘500 low concentration’
in the graph below) gave very accurate, if imprecise results. All of the
other samples had estimated concentration ratios and gave, as expected,
diameters significantly lower than the actual sphere diameters. In all cases
the following physical parameters remained constant:
Our finding are as follows:
A graphical representation of these results (along with manufacturer reported values) is shown below.
Future experimenters would be well served to examine our procedures. Improvement on our results should be relatively simple given the information contained here, particularly if the pitfall of data sampling method could be avoided. A two detector cross-correlating setup will undoubtedly show vast improvements on accuracy and precision, but it will be necessary to solve the data-sampling problem. In principle, two ADC cards could be used simultaneously, but synching them up could prove to be a challenge. There is almost certainly a clever method that can be applied in a University lab setting that doesn't require inordinate amounts of equipment to implement.
As stated earlier, our results do confirm the validity of dynamic light scattering as a measurement technique, but significant improvements can yet be made on our methods and results