SB-807

Record: 429

Category: Column Problem
Product: SB-807
Sample:

Question
Can you please comment on the attached overlay chromatogram of a 300K peox and 1000K peox standard.

Is the separation of these standards typical of what one should expect using the SB 807HQ column by itself?
I simply do not have a good ‘feel’ for what ‘good separation’ looks like.

Answer
I’m sorry we do not have a similar sample chromatogram for PEOX using SB-807.
However, 300K is very close to the lower MW limit of SB-807, thus I can imagine the separation of those two using SB-807 alone will be difficult.
I would recommend you to try connecting SB-807, SB-805, and SB-803 in series.
Meanwhile, I’m glad to see that you are obtaining symmetrical peak for 1000K compared to your previous set of columns (SB-806, 805, 803).

 
 
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