Optics: measuring and testing – With sample preparation – Condensation nuclei detector
Patent
1987-03-24
1988-08-02
Willis, Davis L.
Optics: measuring and testing
With sample preparation
Condensation nuclei detector
356336, 356338, G01N 2101, G01N 2185
Patent
active
047610743
ABSTRACT:
A method and an apparatus for measuring an impurity concentration of a liquid comprises atomizing step for atomizing the objective liquid, e.g. pure water, having a predetermined droplet size distribution, and an evaporating step for evaporating to dryness the droplets so as to generate fine particles. Those particles are fed to a condensation nuclei counter, hereinafter referred to as CNC, which counts the number of fine particles and has a specified sensitivity characteristic curve. Then impurity concentration of the objective liquid can be measured, since the concentration is related to the counted number of the CNC, the distribution of droplet size of the atomizer, and the sensitivity characteristic of the CNC including the particle deposition loss.
REFERENCES:
patent: 4449816 (1984-05-01), Kohsaka et al.
Kano Hajime
Kohsaka Yasuo
Niida Tohru
Sato Hisao
Koren Matthew W.
Nihon Kagaku Kogyo Co., Ltd.
Nomura Micro Science Co., Ltd.
Willis Davis L.
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