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crossposted from c/hplc by u/hedda_ekstrom — [Question] how do you actually verify HPLC
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c/reconstitution·posted 1 year ago by u/oskar_ibarra

concentration — 20 things I got wrong before I got it right

Discussion Well Actually ×7 Cold Box ×2 Sourced ×3

Week 26 update. 7kg down from the start, reflux basically gone since about week 78.

Things that worked: consistency, protein at breakfast, walking more than I want to. Things that did not: everything I bought on the internet to help with reflux.

The part that surprised me is how much of this is admin. Ordering, storing, logging, remembering. Nobody mentions that the hard bit is not the drug, it is the routine.

Happy to answer anything. Please do not ask me what dose you should be on.

9,778 up / 3,376 down74% upvoted32 commentsid 14xw3l22 May 2025

32 comments

8 in this archive, depth 4

best — the order this archive was captured in

u/arto_falk1.1k points·1 year ago

Every time this gets posted it hits the front page and every time someone has to re-explain it.

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u/quiet_reader_991.4k points·1 year ago

Cosigning. The concentration on the vial in marker is load-bearing.

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u/arto_falk745 points·1 year ago

Yeah, showing the arithmetic is the fastest way for someone to spot the error.

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u/rosa_mensah367 points·1 year ago

Slight fix: the number was 96.8, not 99.1. Decimal point, but a fairly consequential one.

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u/hedda_ekstrom649 points·1 year ago·edited

Sceptical. If this were true we would see it reflected in the data and we do not.

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u/cardio_endpoint_c543 points·1 year ago·edited

This is correct. 1mL versus 23mL is the common mistake.

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The arithmetic and the technique. Bacteriostatic versus sterile water, reconstitution volume as a concentration choice, converting mg/mL into insulin-syringe units, dead space, swirl-not-shake, stopper coring, and how long a reconstituted vial is actually good for. Math errors get corrected fast and politely.

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