Wuhan Tetworth Technology Co., Ltd. provides you with a little knowledge of GC2030 gas chromatograph configuration. Gas chromatography is widely used in petroleum, chemical, biochemical, medical and health, food industry, environmental protection and other fields. In addition to quantitative and qualitative analysis, it can also determine the physicochemical constants such as partition coefficient, activity coefficient, molecular weight and specific surface area of ​​the sample on the stationary phase. An instrument for analyzing and detecting each component in a mixed gas. A complete chromatographic detection system is divided into five phases: gas preparation, injection, separation, detection, and results display. Among them, how to configure the essential auxiliary equipment? Strontium Carbonate,High Purity Strontium Carbonate,High Whiteness Strontium Carbonate,White Powder Strontium Carbonate Shenzhou Jiaxin Chemical Co.,Ltd , https://www.jiaxinbaso4.com
  Taking the Tektronix instrument self-developed GC2030 gas chromatograph as an example, the technicians of the company will introduce you how to configure the complete configuration of the gas chromatography detection system.
  Gas source:
In the gas chromatograph system, the carrier gas system is a very important closed pipeline throughout the whole detection process. The carrier gas here refers to a gas that does not react with the sample and the stationary phase, and its function is to carry out detection. The sample enters the column. The carrier gas commonly used in experiments is hydrogen because hydrogen is relatively pure and stable. The hydrogen source can be purchased from a hydrogen cylinder, or it can be prepared by a hydrogen generator. The hydrogen generator is prepared by electrolyzing an aqueous solution to produce hydrogen and oxygen. The oxygen is discharged into the atmosphere, and the hydrogen is separated from the water after entering the hydrogen/water separator. It can be obtained by drying. The use of a hydrogen generator produces high purity hydrogen with a content of up to 99.995%.
  Injection:
Injection is the process of applying a gas or liquid sample to the upper end of a column. The volatile components are volatilized from the sample matrix by heating, and the equilibrium is achieved in the gas-liquid or gas-solid phase, and the top gas is directly extracted for the column. Commonly used injection equipment is autosampler, headspace sampler, six-way valve injector, manual injector, liquid injector, chromatograph, gas injector, solid sampler, etc. . The choice of injector must be based on the nature of the sample to be tested.
  Separation:
Separation is a core step in gas chromatograph analysis. The function is to separate the components in the sample. The equipment used is a column. The principle of column separation is that the affinity of the stationary phase and the components in the sample are different. The components with high affinity move slowly in the column, and the affinity is small, the movement is fast, and the sample has different rates and flows in different sequences. The column is separated. The efficiency of the column determines the resolution of the sample. There are many factors that affect the resolution of the column. The choice of the column directly affects the effect of the test results. Therefore, it is especially important to select a column with high column efficiency.
  Detection:
Detection is an important step in the gas chromatograph analysis method. It is mainly applied to the detector. The function of the sample is to convert the sample components separated by the column into electrical signals according to their characteristics and content. After amplification, the detection is performed on the recorder. Each peak is called a chromatographic peak. The area value enclosed by the chromatographic peak is the content of the corresponding component, so the peak area is the basis for quantitative analysis. According to the characteristics of the sample to be tested, different detectors must be selected, which can be divided into a thermal conductivity detector, a hydrogen flame ionization detector, an electron capture detector, a flame photometric detector, and a mass spectrometer detector. High sensitivity FID detector with sensitivity up to 3*10-12 g/s.
  The results show:
The chromatographic workstation is a chromatographic data processor that records the peak shape of the signal formed on the detector into a chromatogram and prints the processed result on the same sheet of paper, such as retention time, mass fraction of the measured component, etc. Analytical calculation of test results. The N2000 Chromatography Workstation is a domestically used chromatography workstation with a large amount of use on the market. It has become a common control chromatographic data processing tool for customers such as chemical plants. It can automatically identify solvent peaks, tail peaks, sawtooth peaks, front and rear shoulders; automatically track the baseline and automatically divide the peak type; integral sensitivity 1 microvolt? second, small resolution 0.1 microvolt, small peak width 0.1 second.