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c/hplc·submitted 1 year ago by u/two_mil_or_one

[PSA] chromatogram is not what most of this community thinks it is

Discussionbranch of 9 comments

Something I noticed reading old threads that I have not seen said out loud. The advice on HPLC in this community changed substantially around the start of last year, and nobody went back and updated the older posts. So depending on which thread the search engine hands you, you get two contradictory answers with the…

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9 comments, started 1 year ago
u/rina_bergstrom22 points·1 year ago

Yeah, the chromatogram profile matters more than the headline number.

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u/hplc_hobbyistMOD12 points·1 year ago·edited

This is an urgent-care question wearing a forum question's clothes. Please contact a clinician rather than waiting for replies.

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u/hydration_hank4 points·1 year ago

This is the correct method framing. Column and gradient are load-bearing fields.

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u/chain_confirm_cpayments3 points·1 year ago

two labs, two different baselines, two different purity numbers, both honest

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u/two_mil_or_oneOP12 points·1 year ago

Yeah, the chromatogram profile matters more than the headline number.

Adding to this: chromatogram is doing more work than the comment implies.

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[removed]9 points·1 year ago

[removed by moderator]

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u/two_mil_or_oneOP7 points·1 year ago

Ran the same vial on two columns, different purity, both right, different separation. Method matters more than equipment.

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u/ewan_zielinski2 points·1 year ago

Disagree but this is the good kind of wrong — it is specific enough to be checked.

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