Full-automatic headspace sampling device

Abstract

The invention discloses a full-automatic headspace sampling device which comprises a sampling needle, a heating furnace, a sample bottle lifting mechanism, a six-way valve, a gas quantifying cup, a pressurizing control valve, a release control valve, a gas phase carrying interface, a gas chromatograph interface and a controller, wherein the sample bottle lifting mechanism is used for driving a sample bottle to move to be in a waiting position, a heating position or a sampling position; the six-way valve has six connection interfaces and can be rotated; and the controller is used for controlling the sample bottle lifting mechanism to drive the sample bottle to move to the heating position from the waiting position after sampling action is completed, used for driving the sample bottle to move to the sampling position from the heating position after heating is completed, or used for driving the sample bottle to the waiting position from the sampling position after sample feeding action is completed. The full-automatic headspace sampling device provided by the invention can completely meet daily analysis requirements of laboratories of common medicine monitoring, environment protection and the like, and is an ideal tool for directly and efficiently extracting volatile organic compounds from any non-volatile organic matters and for feeding samples to gas chromatography analysis.

Description

technical field [0001] The invention relates to the field of air sampling, in particular to a fully automatic headspace sampling device suitable for directly analyzing volatile organic compounds in liquid or solid samples. Background technique [0002] The use of headspace technology can avoid the tedious and tedious sample pretreatment process, avoid the interference of impurities brought in by organic solvents to the analysis, and reduce the pollution of chromatographic columns and injection ports; headspace chromatography technology is simple and practical in the Environmental detection (such as volatile halogenated hydrocarbons in drinking water and volatile organic compounds in industrial sewage), detection of organic residual solvents in pharmaceuticals, food, forensic science, petrochemical, packaging materials, coatings, and wine industry analysis are widely used . The Headspace Sampler eliminates the complex, error-prone steps of other GC sample preparation techniq...

AI Technical Summary

Problems solved by technology

However, in the existing national standard method, a water bath pot is still used for balanced heating in a water bath, which increases the tediousness and uncertainty of the operation.

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