Sample introduction for spectrometers
First Claim
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1. A system for introducing a sample to an analyzing device comprising:
- a sample chamber having openable access means for receiving a sample, said sample chamber also having an inlet and outlet;
means for atomizing the sample within the sample chamber;
a flow combining portion connected with the outlet of the sample chamber, said flow combining portion further having an inlet for receiving a carrier gas and an outlet for connection to an analyzing device;
sampler gas supply means connected with the inlet of the sample chamber for transporting the sample from the sample chamber through the flow combining portion and to the analyzing device; and
flow control means responsive to the opening of the access means of the sample chamber for increasing the input of the carrier gas to the flow combining portion when the access means of the sample chamber is opened, such that the flow rate of gas to the analyzing device is maintained substantially constant while a portion of the carrier gas flows back through the outlet of the sample chamber to purge ambient air, said flow control means being disposed external to the flow path of the sample extending from the sample chamber to the analyzing device.
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Abstract
A system for introducing a sample to an analyzing device, such as a spectrometer, wherein the flow rate of gas to the analyzing device is maintained substantially constant and uncontaminated during sample changeover. The system includes a flow controller and flow control paths arranged to avoid having any flow diverting valves or direction change in the analyte flow path.
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Citations
6 Claims
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1. A system for introducing a sample to an analyzing device comprising:
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a sample chamber having openable access means for receiving a sample, said sample chamber also having an inlet and outlet; means for atomizing the sample within the sample chamber; a flow combining portion connected with the outlet of the sample chamber, said flow combining portion further having an inlet for receiving a carrier gas and an outlet for connection to an analyzing device; sampler gas supply means connected with the inlet of the sample chamber for transporting the sample from the sample chamber through the flow combining portion and to the analyzing device; and flow control means responsive to the opening of the access means of the sample chamber for increasing the input of the carrier gas to the flow combining portion when the access means of the sample chamber is opened, such that the flow rate of gas to the analyzing device is maintained substantially constant while a portion of the carrier gas flows back through the outlet of the sample chamber to purge ambient air, said flow control means being disposed external to the flow path of the sample extending from the sample chamber to the analyzing device. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification