Determining amount of biological material

Details Determining amount of biological material Determining amount of biological material

1988-02-01

1989-07-18

Chapman, John

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 32A, 435 39, 435291, G01N 33487, G01N 900

Patent

active

048481394

ABSTRACT:
Apparatus for determining the amount of biological material in a fluid medium, typically the concentration of bacteria in a fermentation chamber, has a test cell through which a medium can be passed with bacteria or after bacteria have been removed by filtration. In the test cell a vibratory element is excited to a resonant frequency indicative of density and a comparison of medium density and medium plus bacteria density reveals the bacteria concentration.

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A. Shons et al., "An Immunospecific Microbalance," J. Biomed. Mater. Res., No. 6 (1972), pp. 565-570.
Leopold et al., "The Application of the Mechanical Oscillator Technique for the Determination of the Density of Physiological Fluids," Biomedical Techniques, 22 (1977), pp. 231-234.
Balls, "A New On-Line Density Meter for Viscous Liquids and Slurries," Advances in Instrumentation, 35 (1980), pp. 1-13.

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