The composition and basic requirements of gas chromatograph
Oil Refinery Machine can recycle any kinds of waste oil, like used engine oil, Transformer Oil,Mazut,hydraulic Oil, pyrolysis oil,etc...
End production can be diesel which can be used as power oil in vehicles, boat, power generator,etc...
Capacity this machine can process varities from 5TPD to 300TPD.
End production quality can meet customer require standard.
For getting diesel, we adopt atmospheric distillation system. For getting base oil, we adopt atmospheric distillation technology and vaccum distillation technology.
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First, the composition of the instrument Gas chromatograph by the carrier gas source, injection part, column, column thermostat, detector and data processing system. The temperature of the injection section, column, and detector are all under control.
Second, the basic requirements of the instrument 1, the general requirements of the instrument (1) carrier gas source gas helium, nitrogen and hydrogen can be used as the mobile phase of gas chromatography, according to the nature of the test sample and the choice of carrier gas carrier Unless otherwise specified, the commonly used carrier gas is nitrogen.
(2) The injection mode of the injection part can generally be directly injected into the solution or injected into the headspace. When using the direct injection of the solution, the injection port temperature should be higher than the column temperature 30 ~ 50 °C. Headspace sampling is suitable for the separation and determination of volatile components in solids and liquids.
(3) Columns are selected as needed. The new packed and capillary columns need to be aged prior to use to remove residual solvents and low molecular weight polymers. Columns that have not been used for a long time should be aged prior to use to stabilize the baseline.
(4) The fluctuation of the oven temperature of the column oven will affect the reproducibility of the chromatographic results. Therefore, the temperature accuracy of the column oven should be ±1°C and the temperature fluctuation is less than 0.1°C per hour.
(5) Detectors Suitable gas chromatography detectors include flame ionization detector (FID), thermal conductivity detector (TCD), nitrogen phosphorus detector (NPD), flame photometric detector (FPD), electron capture detector (ECD), Mass Spectrometry Detector (MS), etc. The flame ionization detector responds well to hydrocarbons and is suitable for the detection of most drugs; nitrogen and phosphorus detectors are highly sensitive to compounds containing nitrogen and phosphorus; flame photometric detectors are highly sensitive to compounds containing phosphorus and sulfur; The capture detector is suitable for halogen-containing compounds; the mass spectrometry detector can also give the corresponding structural information for a component of the test article, which can be used for structural confirmation. Unless otherwise specified, flame ionization detectors generally use hydrogen as the fuel gas and air as the oxidizer gas. When using flame ionization detectors, the detector temperature should generally be higher than the column temperature, and should not be less than 150 °C, so as not to condensation, usually 250 ~ 350 °C.
(6) Data processing systems currently use computer workstations. The Pharmacopoeia stipulates that the chromatographic conditions stipulated under each species, except for carrier gas, detectors, types of fixative liquids, and specially designated chromatographic column materials, shall not be changed. Others include the column diameter, length, carrier grade, particle size, and fixed liquid coating. Concentration, carrier gas flow rate, column temperature, sample volume, detector sensitivity, etc., can be appropriately changed to suit specific species and meet system suitability test requirements. The general chromatogram was recorded in about 30 minutes.
2. System suitability test Unless otherwise specified, the requirements under the item of high-performance liquid chromatography shall be followed.
Third, the determination method (1) internal standard method plus a correction factor to determine the content of a certain impurity in the test or the main component (2) external standard method for the determination of an impurity in the test crystal or the main component content (3) area normalization The specific contents of the above methods 1 to 3 are the same as the corresponding provisions of high performance liquid chromatography.