Improved full-automatic solid-phase extraction instrument and application therefore to automatic separation of monoaromatic sterane

Abstract

The invention discloses an improved full-automatic solid-phase extraction instrument and application thereof to automatic separation of monoaromatic sterane. The automatic solid-phase extraction instrument comprises a solvent system, a solvent switching valve, a metering pump, a chromatographic column and a collecting system in sequence, wherein the systems are connected through a flow passage circuit; an appropriate solvent is selected by controlling the solvent switching valve to be pumped into the chromatographic column by the metering pump; all kinds of substances adhered onto a solid phase of the chromatographic column are separated; and the eluted different substances are controlled by mechanical arms of the collecting system to flow into different receiving flasks. According to a method for separating the monoaromatic sterane by the instrument, the monoaromatic sterane is completely separated from saturated hydrocarbon component and completely enters an aromatic hydrocarbon component. The method solves the problem that saturated hydrocarbon is mutually mixed with aromatic hydrocarbon in an existing method, complete separation of monoaromatic sterane substances is realized, and the improved full-automatic solid-phase extraction instrument is introduced, so that automation of sample analysis is realized, and the disadvantages of complex operation and low work efficiency for manual separation are greatly avoided.

Description

technical field [0001] The invention belongs to the field of geochemical analysis, and in particular relates to an improved full-automatic solid-phase extraction instrument and its application in the automatic separation of monoaromatic steranes. Background technique [0002] Studies on biomarker compounds have shown that different ratios of C27-C28-C29 monoaryl steranes can represent various types of source inputs. In the early diagenesis, monoaromatic steroids may only be derived from sterols with specific side chain double bonds. According to this, monoaromatic steroids have more parent source characteristics than steranes in saturated hydrocarbons. Stronger evidence can be provided when comparing oil sources. [0003] Although the distribution of different organic matter overlaps, the different ratios of C27-C28-C29 monoaryl steranes represent continental, marine or lake input. Generally speaking, marine carbonate rock crude oil contains higher C29-monoaromatic sterane...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems existing in the prior art, the present invention provides an improved automatic solid-phase extraction apparatus and its application in the automatic separation of single aromatic steranes, which solves the problem of mixing saturated hydrocarbons and aromatic hydrocarbons and manual separation in the prior art. The problem of cumbersome operation and low work efficiency

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