Liquid-phase on-line chromatograph
Thread Content
This is the first time I’ve come across an online liquid chromatography analyzer; I had only heard of online gas chromatography before. I would appreciate it if experts could provide some information on online liquid chromatography, which manufacturers produce such devices, and what considerations should be taken into account when selecting and using them. It would be even better if there were user manuals available for these instruments! ! ! The images represent the components to be analyzed, all of which are in liquid form.
These are merely liquid-phase injections, but the analysis process remains gas chromatography, that is, online gas chromatographic analysis equipped with a liquid injector. It’s just a routine hydrocarbon composition analysis, a PONA or POINA analysis. Based on the data, it seems to be analysis of reformed regenerated oil or analysis of feedstock before aromatic extraction.
I’ve encountered a professional in the field of reformed oil analysis. Could you provide a more detailed explanation? Is it necessary to heat and vaporize the medium for analysis? Will gasification have an impact on the analysis? Are there any other technical requirements? I look forward to answers regarding this method of analysis. Thank you! ! ! !
It’s not just an ordinary specialty; it’s a highly specialized one. This type of analysis involves introducing a quantitative liquid sample into the vaporizer of the chromatograph; the sample is vaporized through instantaneous heating, and then carried by the carrier gas to the chromatography column system where it is analyzed under specific chromatographic conditions. It’s not some special technique; it’s just a conventional gas chromatography analysis method using liquid injection. The analysis method used in laboratories is generally vaporization-split injection. The industrial chromatography of the Yokogawa, Ximen, and Asia families can all be achieved.
Conventional gas chromatography analysis can be used; samples are taken from branches in the pipeline, pre-treated, and then fed into the chromatography analysis unit. Before injection into the chromatograph, they are vaporized at high temperature and carried by the carrier gas into the chromatographic column. Once the analysis is complete, the sample is converted back to a liquid state and returned to the process pipeline.