size exclusion / GC question

[theonlytycrane]

I chose (D), but the answer given is (C) and I think it's incorrect. Larger molecules will come off the SEC column first, but should have longer GC retention times (higher bp), correct?

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[pilot66216]

Totally agree with you there.

 

[aalamruad]

View attachment 203580

I chose (D), but the answer given is (C) and I think it's incorrect. Larger molecules will come off the SEC column first, but should have longer GC retention times (higher bp), correct?

You're right. Where did you come across this question?

 

[theonlytycrane]

@walloobi it was on a TPR exam. I think I'm going to go for NS / EK next. The TPR quality wasn't great.

 

[aalamruad]

@walloobi it was on a TPR exam. I think I'm going to go for NS / EK next. The TPR quality wasn't great.

EK's are solid

 

[theonlytycrane]

I think I saw you posting about them a bit ago. Have you gotten through all 4? Have you also tried any NS?

 

[aalamruad]

I think I saw you posting about them a bit ago. Have you gotten through all 4? Have you also tried any NS?

Still haven't done the 4th one yet. Nope, haven't tried NS yet, but probably gonna do those soon. Have you done any other than TPR?

 

[theonlytycrane]

@walloobi Just the NS half-length. I'm going to be getting through one a week from now on. They are equally grueling to take as to review!