gas chromatographIt is often used for quantitative analysis of organic matter. After the instrument is running for a period of time, due to electrostatic reasons, more dust is easily adsorbed inside the instrument. In addition to dust accumulation, the circuit board and the socket of the circuit board are often adsorbed with some organic vapors. Because the freezing point of some organic matter is relatively low, solidified organic matter is often found at the position of the sample inlet. After a period of use, the inner diameter of the shunt pipeline becomes thinner and even blocked by organic matter. During use, TCD detector is likely to be contaminated by organic matter. FID detector is used for organic matter analysis for a long time. Organic matter deposits at the nozzle or collector position or carbon deposits at the nozzle and collector often occur. Therefore, the cleaning of the gas chromatograph is very important.

Purge and clean the inside of 1. instrument

After the gas chromatograph is shut down, open the side and rear panel of the instrument, purge the dust inside the instrument with instrument air or nitrogen, and use a soft brush to deal with the places with more dust or difficult to purge. After purging, scrub the places with organic pollution inside the instrument with water or organic solvent, and wipe the water-soluble organic matter with water first, can not be thoroughly cleaned place can be treated with organic solvents, water-insoluble or may occur with water chemical reaction of organic matter with non-reactive organic solvents for cleaning, such as toluene, acetone, carbon tetrachloride, attention, in the process of wiping the instrument can not cause corrosion or secondary pollution on the surface of the instrument or other parts.

Maintenance and cleaning of 2. circuit boards

Before the gas chromatograph is ready for maintenance, cut off the power supply of the instrument. First, purge the circuit board and the circuit board slot with instrument air or nitrogen. During purging, use a soft brush to carefully clean the dusty parts in the circuit board and the slot. Wear gloves as much as possible during operation to prevent static electricity or sweat stains on hands from affecting some components on the circuit board. After the purging work is completed, the use of the circuit board should be carefully observed to see if the printed circuit board or electronic components are obviously corroded. The electronic components and printed circuits contaminated with organic matter on the circuit board should be carefully wiped with absorbent cotton dipped in alcohol. The circuit board interface and slot part should also be wiped.