Method for Producing Water Free from Suspended Particles
Original Publication Date: 1978-Aug-01
Included in the Prior Art Database: 2005-Feb-21
The low angle laser light scattering (LALLS) photometer is perhaps the most sensitive instrument for detecting suspended particles in liquids. For example, very small suspended solids and micelles (diameter < 0.1 mu m) suspended in water in less than a few parts per million concentration can easily be detected. It is for this reason that precise and accurate molecular weight measurements of water-soluble polymers by light scattering technique are difficult to obtain. Water which is used as solvent in light scattering is usually obtained by a careful, costly and tedious multiple distillation technique. The best water prepared in this manner had a Rayleigh factor of 9 x 10 (the lower the Rayleigh factor, the purer the water).