Portable gas chromatograph analysis device

Abstract

The invention relates to the field of insulating oil gas chromatography analysis equipment and in particular to a portable gas chromatograph analysis device comprising a casing; a sample pretreatmentmodule for separating a gas in an insulating oil sample container by an automatic headspace degassing device and quantitatively transferring the same to a chromatographic column box module through a sampling device and to a detector module; the chromatographic column box module including a chromatographic constant-temperature column box and a TCD detector, and used for subjecting the received gassample to chromatographic separation through an internal chromatographic column and transferring the same to the detector module; the detector module including an FID detector and a Ni catalytic converter which convert the component concentration after the chromatographic separation into an electrical signal and feed the electrical signal back to the controller in order that the controller amplifies the electrical signal, performs an analog-to-digital conversion process, and transmits a digital signal to a chromatographic workstation for data processing to obtain final chromatographic data. The portable gas chromatograph analysis device is high in sensitivity, small in volume, convenient to carry, efficient in time, and good in practicality and operability.

Description

technical field [0001] The invention relates to the field of insulating oil gas chromatography analysis equipment, in particular to a portable gas chromatography analysis device. Background technique [0002] At present, there are two types of special portable analytical instruments used in the analysis of insulating oil. One is a general-purpose portable gas chromatograph, which can select different chromatographic methods according to the needs of sample analysis and cooperate with sample pretreatment equipment to complete the analysis of various samples. For insulating oil samples, it is necessary to be equipped with a special oscillating degassing sample pretreatment device and an air source supply system. The other type is a fully automatic analytical instrument for insulating oil with integrated sample pretreatment. For example, the portable insulating oil analyzer based on photoacoustic spectroscopy has the problem that the detection sensitivity of acetylene is at le...

AI Technical Summary

Problems solved by technology

For example, the portable insulating oil analyzer based on photoacoustic spectroscopy has the problem that the detection sensitivity of acetylene is at least about 0.5uL / L

This type of equipment adopts chromatographic analysis method with high sensitivity. The purge and trap dynamic headspace degassing method has the advantages of short degassing time and high degassing efficiency. The degassing rate of vacuum degassing is easily affected by the vacuum degree. The linearity of the gas rate is poor, and the results of the analysis need to be compared with the results of the mechanical shock headspace degassing widely used in the laboratory; and for data consistency, it is necessary to analyze the dynamic headspace degassing method or the vacuum degassing method. As a result, standard oil samples are used for calibration and correction on a regular basis. The operation is complex and cumbersome, and errors are easily introduced, and the analysis period is long.

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