Chemistry: analytical and immunological testing – With use of condensation nuclei
Patent
1985-11-25
1988-12-27
Richman, Barry S.
Chemistry: analytical and immunological testing
With use of condensation nuclei
73 61R, 356 36, 356 37, 356335, 356336, 436164, 436181, G01N 128, G01N 1502
Patent
active
047940867
ABSTRACT:
Method and apparatus for the measurement of sub-ppm concentrations of impurities in liquids. The liquid to be measured for impurities is dispersed into uniform droplets of a precisely known diameter D in a gas stream, such as air, using for example, a vibratory orifice generator. The dispersed droplets evaporate in the gas stream to leave a residue particle having a diameter d, which can be measured for example by means of a laser light scattering spectrometer. The concentration by volume, C.sub.v, of the impurities can then be calculated according to the equation; C.sub.v =(d/D).sup.3.
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Kasper Gerhard
Wen Horng Y.
Bethel George F.
Bethel Patience K.
Hill Jr. Robert J.
Liquid Air Corporation
Richman Barry S.
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