Introduction to gas chromatograph method of cleaning and maintenance

Abstract: introduction to gas chromatograph cleaning and maintenance methods of the information produced by excellent flow meter, flow meter manufacturer to offer you the quotation. 1 instrument internal stop after purging, clean gas chromatograph, open the side and back panel of the instrument, instrument air or nitrogen purging of instrument internal dust to dust more or purging not easily with a soft brush with processing. After completion of purging. More flow meter manufacturers choose model price quote you are welcome to inquire, here is a introduction to gas chromatograph cleaning and maintenance methods of the article for details. 1 instrument internal stop after purging, clean gas chromatograph, open the side and back panel of the instrument, instrument air or nitrogen purging of instrument internal dust to dust more or purging not easily with a soft brush with processing. Purging is completed, the existence of the local water organic pollution of an instrument or organic solvent to scrub, to wipe water soluble organic matter to water, in areas not thoroughly clean can be treated with organic solvent, the water-insoluble or may react with water with organic matter does not react with the organic solvent to clean, such as toluene, acetone, carbon tetrachloride, etc. Note that during the process of wiping the instrument can't cause erosion to instrument surface or other components or secondary pollution. 2 circuit board maintenance and clean gas chromatograph preparation before inspection, the detection instrument power, first with instrument air or nitrogen purging of circuit board and circuit board slot, purging with a soft brush with department of circuit board and slot dust more carefully clean up. Wear gloves as far as possible in the process of manipulation and prevent electrostatic or hand perspiration impact department components on printed circuit boards. Purging work is completed, should be carefully observed the usage of circuit board, the printed circuit board or electronic components have significant erosion phenomenon. The circuit boards with organic matter of electronic components and printed circuit with dip in with cotton wool take alcohol to wipe, PCB interface and slot department also want to wipe. 3, sampling mouth cleaning during the inspection, the gas chromatograph sample mouth glass liner, shunt tablet, injection port distribution piping, EPC etc. Parts are cleaning is very necessary. Glass liner and diversion plate cleaning: carefully pulled out from the instrument glass liner, use tweezers or other small tools carefully remove the liner of glass wool and other impurities, move the process not to scratch the surface of the liner. If the premise allows, can be preliminary cleaning glass liner in organic solvent partly ultrasonic cleaning, drying after use. Can also clean directly with the organic solvents such as acetone, toluene, cleaning is completed through the dry can be used. Shunt tablet zui for ideal cleaning method is ultrasonic processing in solvent, drying after use. Also can choose a suitable organic solvent to clean: from the injection port after take out a shunt tablet, first use the inert solvent cleaning, such as toluene with methanol alcohol solvent cleaning, drying after use. Bypass of the pipeline cleaning: gas chromatograph in analysis of organic and polymer compounds, many organic compounds with low freezing point, samples from the gasification chamber through the bypass pipeline process, department of organic matter in the shunt line set. Gas chromatograph through a long period of time after use, the inner diameter of the pipe diversion became smaller, and even completely blocked. Distribution piping blocked, instrument, injection port display abnormal pressure peak deformation difference, abnormal results. In the process of inspection, no matter in advance can determine distribution piping without blocking phenomenon, all need to clean distribution piping. Distribution piping cleaning generally choose the organic solvents such as acetone, toluene, severe distribution piping is sometimes used to jam simple cleaning methods are difficult to clean, need to take some other auxiliary mechanical method to complete. You can pick and choose the appropriate degree of steel wire to simplicity of dredging of diversion pipe, and then with the organic solvents such as acetone, toluene and clean. Because it is not easily in advance make correct judgement of the situation of distribution department, rival dynamic shunt gas chromatograph, pipeline cleaning in the process of inspection of shunt is very necessary. For EPC control distribution of the gas chromatograph, because of long time use, may make some small sample pad interface chip into the EPC and gas pipeline, and could cause blockage to EPC department at any time or injection port pressure changes. So every time inspection process inspection on instrument department of EPC, as far as possible by using toluene, acetone and other organic solvent for cleaning, and drying process. As sample, the injection port of external organic condensation may form department at any time, can dip in with cotton wool take acetone, toluene and other organic matter to initial injection port to wipe, and then to their organic matter with mechanical methods to remove first, pay attention to in the process of removal of organic matter of solidification must be careful and do not cause damage to equipment parts. After solidification of the organic matter removal, then use organic solvent to carefully wipe the instrument parts. 4, TCD and FID detector TCD detector in use process of cleaning the column may be out of the entrainment of sediment or samples contaminated by other substances.

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