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
1996-08-27
1999-11-30
Brock, Michael
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
7386331, 422 681, G01N 100, G01N 116, G01N 1506
Patent
active
059922214
ABSTRACT:
Pipes provided with each switching valve in intermediate portions thereof for feeding sample solutions to a separation mechanism are joined by a multi-way joint, to reach the separation mechanism through a pump. When all valves are closed while driving the pump and thereafter one valve is opened, all bubbles etc. downstream the opened valve are swept and eliminated due to abrupt flow of a liquid since a portion downstream the valve has been decompressed. In switching of a sample in sample measurement, a valve of a pipe for a completely measured sample is left open while a valve of a pipe for a next sample is opened, and then the valve of the pipe for the previously completely measured sample is closed after a while. Thus, pressure fluctuation following sample switching is avoided.
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Hashizume Yoshio
Hayashi Ryuzo
Kariyone Akio
Brock Michael
New Oji Paper Co. Ltd.
Politzer Jay L.
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