Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1990-06-28
1991-12-31
Williams, Hezron E.
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 53, G01N 3002
Patent
active
050760971
ABSTRACT:
An apparatus and method for determining the concentration of macromolecules and colloids in a liquid sample is disclosed. The apparatus preferably includes an electrospray apparatus 16 for forming droplets from the sample. Liquid is removed from the droplets by drying in the electrospray apparatus 16, thereby forming an aerosol. The aerosol of a size greater than a predetermined size is then counted by a condensation nucleus counter 52. In this manner, the target macromolecules and colloids are counted. This apparatus is capable of detecting very small macromolecules and colloids of a wide range of materials in a liquid, for example, individual molecules having molecular weight as small as 10,000.
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Exhibit A--Abstracts from U.S. Pat. Nos. 4,542,293, 4,531,056, 4,214,160 and 4,075,479.
Dorman Frank D.
Kaufman Stanley L.
Zarrin Fahimeh
Roskos Joseph W.
TSI Incorporated
Williams Hezron E.
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