Sample introduction system for nonsegmented continuous flow anal

Details Sample introduction system for nonsegmented continuous flow anal Sample introduction system for nonsegmented continuous flow anal

1987-01-20

1988-05-10

Levy, Stewart J.

Measuring and testing

Sampler, sample handling, etc.

Analyzer supplier

G01N 100

Patent

active

047427167

ABSTRACT:
Sample injection system for nonsegmented, continuous flow analysis comprising an inlet channel, an analyzer channel and a carrier stream channel connected in a confluence point, an aspirating pump in the analyzer channel, a carrier stream pump in the carrier stream channel with a higher capacity than the aspirating pump and an analyzer. In a first step prior to the sample injection, the carrier stream pump forwards carrier stream to the confluence point, the aspirating pump sucks carrier stream from the confluence point, at a lower rate than the carrier stream pump and an outflow of carrier stream drains through the inlet channel. In a second step, the carrier pump is stopped, the inlet end of the inlet channel is brought in contact with the sample solution, and the aspirating pump sucks sample into the inlet channel and the analyzer channel. In the third step, the carrier pump is restarted, whereby the sample in the analyzer channel is aspirated into the analyzer, and all the sample in the inlet channel is pressed out into the waste. The analyzer may be a flow through detector, dialyzer, or any other apparatus for analysis. The performance can also be made as a multichannel system for simultaneous analysis of several components in different analyzers.

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