As a more sophisticated analytical instrument, gas chromatographs often encounter various abnormalities during use due to complicated structure, multiple condition settings, long startup preparation time, and gas source preparation. If the maintenance is not carried out in advance for the cause, serious consequences can result. Lu Chuang Analysis's production technicians introduced the following abnormalities that are likely to occur in the analytical application of the gas chromatograph - the reason for not finding the peak after injection. Â When we found in the experiment that the gas chromatograph did not produce a peak after injection, first check whether the syringe is clogged, and then check whether the graphite gasket of the inlet and detector is tight and leaking. If it is normal, just check the column to see if there is a leak or not. Finally, observe whether the detector outlet is unblocked. But sometimes there will be another situation. For example, the parts of the instrument we used to run the day before are still normal, but the next day, the unresponsive peak signal is turned on for no reason. Generally, this may be because of the injection. The pressure at the head of the column is not up to the set value. One is to see the pressure of the source and the second is to see if it is blocked by the gas passage. It is particularly important to note that the ECD checker outlet may not be unobstructed, causing the gas to flow in the gas path and failing to carry the sample to the detector, so that no peak is present. Â In addition to the above conditions, the gas chromatograph is often prone to failures and the overall instrument does not work when the fuse is burned out (no power indication), the temperature of each part does not start heating up, and the temperature of each part is abnormal (the temperature is abnormally high) Or not working), there are peaks widening, the baseline is unstable, etc., then we have to eliminate one by one reason to ensure that the instrument performs chromatographic analysis under normal conditions. Â The above is the reason why you can't see the peak of the chromatograph injection. I hope to help you use the gas chromatograph. For more detailed information, please contact the technicians of Shandong Luchuang Analytical Instrument E-mail Company or visit the website http:// to learn about the query.