Cost per milligram: difference between revisions
Diff·revision 3 → 4·19:31, 2 Jan 2025
Difference between revision 3 and revision 4 of Cost per milligram. 5 lines changed; the page grew by 489 bytes.
| Revision 3 — 17:11, 28 Dec 2024 Chromatokid (talk) fix hyphenation per PP:MOS 1,020 bytes ±0 | Revision 4 — 19:31, 2 Jan 2025 HarmReductionHen (talk) state the exchange rate and its date 1,509 bytes +489 | ||
|---|---|---|---|
| 10 | A price divided by a nominal label claim is a cost per nominal milligram. The mass of peptide in the vial is the product of fill mass, [[Peptide content|content]] and purity, and at typical content values a nominal milligram is appreciably less than a milligram of peptide. See [[Underfilling]] and [[Trifluoroacetate counterion]].{{r|usp1503}} | 10 | A price divided by a nominal label claim is a cost per nominal milligram. The mass of peptide in the vial is the product of fill mass, [[Peptide content|content]] and purity, and at typical content values a nominal milligram is appreciably less than a milligram of peptide. See [[Underfilling]] and [[Trifluoroacetate counterion]].{{r|usp1503}} |
| 11 | 11 | ||
| + | 12 | == The arithmetic == | |
| + | 13 | Suppose two offers of a nominal 5 mg vial, one at a given price with a certificate reporting 82% [[Peptide content|peptide content]] and 5% water, the other cheaper with a certificate reporting purity only.{{r|usp1503}} | |
| + | 14 | ||
| + | 15 | The first contains about 4.1 mg of peptide, so its cost per milligram of peptide is the price divided by 4.1. The second contains an unknown mass, so no such figure exists for it — the comparison cannot be made, rather than being made and won. | |
| + | 16 | ||
| 12 | == References == | 17 | == References == |
| 13 | {{reflist}} | 18 | {{reflist}} |