63. Using the Heller calibration curve, calculate the particle size of the polystyrene latex from absorbance D versus wavelength λ. The Heller curve must first be built according to the following data:
Latex particle diameter, d, nm 77.0 88.0 95.0 106.7 111.0 119.0 132.0 143.0 158.0 167.0 189.0
Exponent n in the Heller equation 3.82 .364 3.545 3.30 3.235 3.04 2.82 2.72 2.66 2.45 2.365 2.14
λ, per 400 440 490 540 582 630
D 0.795 0.566 0.382 0.267 0.202 0.150

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