Analysis of Frequently Asked Questions of Chromatographic Analyzers

The working principle of the chromatographic analysis instrument is carried by the carrier gas. By separating the components of the chromatographic column for which the components in the mixture are to be detected, the components are separated and sequentially introduced into the detector to obtain the detection signals of the components. According to the order of the detectors, the components can be distinguished by comparison. The content of each component can be calculated based on the peak height or peak area. The commonly used detectors are: thermal conductivity detectors, flame ionization detectors, antimony ionization detectors, ultrasonic detectors, photoionization detectors, electron capture detectors, flame photometric detectors, electrochemical detectors, mass spectrometers Detectors, etc. There are usually three major types of problems:

1. The chromatographic peak does not appear after the sample is placed. The inspection procedure is as follows. â—† The syringe is blocked. â—† The injection port and the gasket are tight and not leaking.

â—† The column is leaking gas â—† The outlet is blocked. 2. The baseline problem will cause the baseline of the chromatogram to fluctuate and drift. Always encounter this kind of situation, you should check:

â—†Cylinder and equipment accessories have been replaced recently. â—†Is the mat being aged? â—†Is quartz wool aged? 3. Peaks are missing. The problem can be solved by the following measures:

â—† High-temperature cleaning process, reducing the pollution of gas products â—† Samples should be cleaned â—† Reduce the use of oil substances These are common problems, and we hope to help everyone.