Apparatus and method for the reduction of interferences in chrom

Details Apparatus and method for the reduction of interferences in chrom Apparatus and method for the reduction of interferences in chrom

1981-11-09

1983-09-13

Kazenske, E. R.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Content or effect of a constituent of a liquid mixture

73 231, 2101982, 422 70, G01N 3108

Patent

active

044035039

ABSTRACT:
Apparatus and method for improving the definition of a signal of interest in the presence of certain types of interfering signals in chromatography. The apparatus in one embodiment of the invention includes a chromatographic column through which a sample can be passed and a first detector, a variable volume cell and a second detector connected in series with the first detector being connected to the output of the column. The apparatus also includes a device for recording the differential output of the detectors. By passing the sample sequentially through the detectors and adjusting the volume of the variable volume cell, the interfering components can be made to be present in both detectors whereby partial cancellation occurs and the signal of interest becomes more readily detectable. In another embodiment of the invention, where detection is accompanied by destruction of the sample, a device is provided to split the outflow of the column and one resultant portion of the outflow goes directly to a first detector and the other portion goes to a variable volume cell and a second detector connected in series.

REFERENCES:
patent: 3508880 (1970-04-01), Hrdina
patent: 3847550 (1974-11-01), Scott et al.
patent: 3981179 (1976-09-01), Roof
patent: 4032445 (1977-06-01), Munk
patent: 4043906 (1977-08-01), Helmer
patent: 4070284 (1978-01-01), Fujita et al.
patent: 4137161 (1979-01-01), Shimada et al.

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