SU387281A1 - METHOD OF CHROMATOGRAPHIC ANALYSIS - Google Patents

Description

one

The invention can be applied when using chromatographs in laboratories or on technological systems installed as sensors of automatic control and regulation systems.

The known method of chromatographic analysis, which provides for the following successive operations: analysis of the test sample; analysis of the standard juraba, usually containing a key component of a known concentration; calculation of the sensitivity of the device according to the analysis of the standard.

However, according to a known method, the time required for obtaining information on the quantitative composition of the sample under investigation is significantly increased, and the reliability of the information obtained decreases, since with two successive analyzes of the test sample and the standard one over time, the analysis conditions may change.

The whole1 was invented and - increased accuracy of analysis and reduction of the analytical cycle time.

This is achieved by the fact that the standard sample is introduced during the analysis of the test sample at a point in time, which ensures that its components leave the separation column between the components of the analyzed mixture.

In practice, the calculation of the times for the introduction of a standard is not difficult, especially in the case of the more common practice in practice when the standard nrob is a mixture of carrier gas and one component.

Example. The mixture contains the components L + B + C, and the retention time for these conditions, anal1 for is / l, respectively (c, tc- Calibration is performed on component B. Under these conditions, it is advisable that the peak of substance B from the standard the sample left the column directly after the PIKOM 5 test in the nz nss.geduemy samples at the time of the call

, + l

where ts is the time of the peak of the substance In a standard sample, measured from the time of entry of the analyzed sample.

The time of entry of a standard sample is determined by the equation.

///v in v

Subject and. gaining

A method of chromatographic analysis involving entry, separation and recording at the output of the chromatograph of the components of the mixtures of the standard and test lombard, characterized in that, in order to increase the accuracy of the analysis and reduce the time of the analytical cycle, an analysis of the sample under investigation.