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

switched from 1.7mg to 1.0mg and the reflux got better, not worse

Correctionbranch of 10 comments

Genuinely asking, not being difficult. Everyone in c/glp1uk repeats that HPLC is important. I believe it, but I have never seen anyone show why, and when I search I get 21 threads of people agreeing with each other. Is there a paper? Is there a measurement? Or is this one of those things that is true because it has…

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10 comments, started 1 year ago
u/marit_mensa41 points·1 year ago

integration decision on a shoulder changes your number by half a point on its own

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u/hedda_ekstrom28 points·1 year ago

integration decision on a shoulder changes your number by half a point on its own

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

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u/priya_ogunleyeOP20 points·1 year ago

A shoulder on the main peak that 11 analysts integrated 8 different ways. Same trace, 98.1 spread.

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u/canada_coverage16 points·1 year ago

integration decision on a shoulder changes your number by half a point on its own

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u/priya_ogunleyeOP7 points·1 year ago

Strongly agree. Largest single impurity tells a different story than total purity.

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u/samir_falk13 points·1 year ago·edited

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

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u/aksel_palacios3 points·1 year ago

the detector wavelength matters more than people think

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u/yara_boateng4 points·1 year ago

Not convinced. The evidence does not support that reading.

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u/adaeze_batista3 points·1 year ago·edited

chromatogram or it did not happen

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u/insulin_syringe_ian34 points·1 year ago·edited

Gradient goblin mode: changed the solvent composition 22 times, finally got good resolution on a method development peak.

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