Adjust retention time
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Could everyone please explain what the purpose of adjusting the retention time is? Thank you!
Generally, appropriately extending the retention time is done to achieve better separation； Shortening the retention time appropriately is aimed at saving resources and improving efficiency.
I think adjusting the retention time is the same as the retention time itself; both are used for the qualitative identification of substances.
I think what you’re asking about is “adjusting the retention time,” which is obtained by subtracting the dead time from the retention time; I* usually refer to it as the absolute retention time. Due to reasons such as column packing or coating, or sampling issues, the dead times of the components can vary to some extent ； The retention time after the dead time is basically constant; if there are further issues, it’s a problem with column efficiency. With the adjusted retention time as a reference, it is easier to determine the issue. Personal opinion.
? ? ? I’m not sure whether it refers to “adjusting the retention time” or adjusting the “retention time” itself ? ? The post is a bit confusing.....
Thank you for pointing out the issue; it is “adjusting the retention time”.
Chromatography provides quantitative but not qualitative information; qualitative determination is made based on retention time. In the workstation’s ID table, the retention time of the stored peak is used to determine the name of the component and to calculate its content. In many cases, human and systemic factors cause significant retention time errors, making it impossible to identify the components using the ID table. So it can also be corrected by adjusting the retention time.
Retention time is actually also a method used for qualitative analysis in chromatography. Substances that are identical will have the same retention time, but substances with the same retention time are not necessarily the same substance. The adjustment of retention time should be determined based on the specifics of your analysis
Could you give a simple example to illustrate it? Thank you!