초록 ▼

A gas chromatography assembly has a substrate wafer with grooves and a valve seat etched therein. A plate cooperates with the wafer and the grooves to define gas channels: a carrier gas channel and a sample gas channel, each passing through the valve seat. A valve actuator is attached to the valve s

A gas chromatography assembly has a substrate wafer with grooves and a valve seat etched therein. A plate cooperates with the wafer and the grooves to define gas channels: a carrier gas channel and a sample gas channel, each passing through the valve seat. A valve actuator is attached to the valve seat for controlling the flow of sample gas from the sample gas channel into the carrier gas channel. A pump is attached to the wafer and is connected to the sample gas channel. The pump cooperates with the valve actuator to inject sample gas from the sample gas channel into the carrier gas channel. A modular capillary tube and a detector are connected to the carrier gas channel to analyze the properties of the sample gas flowing in the carrier gas channel from the sample gas channel.

대표청구항 ▼

A miniature gas chromatography assembly comprising a substrate wafer having: an etched carrier gas groove means for containing carrier gas; an etched sample gas groove means for containing sample gas; and a first valve seat means, said sample gas groove means and said carrier gas groove means passin

A miniature gas chromatography assembly comprising a substrate wafer having: an etched carrier gas groove means for containing carrier gas; an etched sample gas groove means for containing sample gas; and a first valve seat means, said sample gas groove means and said carrier gas groove means passing through said first valve seat means; a plate cooperating with said wafer and said groove means to define gas channel means; a first valve actuating means attached to said first valve seat means for controlling the flow of sample gas from said sample gas channel means into said carrier gas channel means; a pump means attached to said wafer connected to said sample gas channel means; said pump means cooperating with said first valve actuating means for injecting sample gas from said sample gas channel means into said carrier gas channel means; a modular capillary tube means attached to said wafer; one end of said capillary tube means connected to said carrier gas channel means; and a detector means connected to other end of said capillary tube means for measuring properties of gas flowing from said capillary tube means.