A retail vial at 99.16 % is worth more evidentially than a selected vial at a higher figure. That is the whole argument for recording provenance at all.
price_per_mg
Cost per milligram of recovered peptide, not per vial.
Section 1
Contribution
Comments technically on records submitted by others. Annotations are signed and are not moderated for agreement.
Records submitted
0
n=0
Annotations
175
n=175
Median purity submitted
suppressed
n=0
n<3 — see individual records
Suppliers covered
0
n=0
This handle has submitted no records. Annotators comment on other people's submissions and are not required to submit.
Section 2
Annotations
Signed technical comments on records. The index does not moderate annotations for agreement with its own arithmetic, and several of these disagree with it. Where a handle has made the same point on several records, one instance is shown and the rest are reachable from the records themselves.
A retail purchase carries a price, which makes cost per milligram of recovered peptide computable. That is the comparison a buyer actually needs and it exists only for this provenance class.
Once the balance closes, cost per milligram of peptide is computable from the invoice. That is the calculation this whole block exists to enable.
Purity 99.52 %, water 3.24 %, counter-ion 4.00 % acetate, mass balance closed, provenance independent. There is nothing outstanding on this record.
At 89.4 % of label the effective price per milligram is roughly a tenth above the catalogue figure. That is worth knowing and it is arithmetic rather than opinion.
Purity 98.60 %, water 1.36 %, counter-ion 6.97 % acetate, mass balance closed, provenance independent. There is nothing outstanding on this record.
The index cannot verify that the vial assayed is representative of the lot it came from, and says so on every record. Provenance narrows that gap; it does not close it.
Two vials with the same claim and different salt forms contain different amounts of peptide. That is the practical consequence and it is worth more attention than most purity arguments.
The index's mass balance on this record closes to two decimal places with 33.35 % citrate in it. The number is not an anomaly; it is a component of a coherent gravimetric picture.
Purity 99.07 %, water 3.72 %, counter-ion 4.55 % acetate, mass balance closed, provenance independent. There is nothing outstanding on this record.
Buyer-sourced through an ordinary retail order, so the supplier had no opportunity to select the vial. This is the provenance class the index weights and it is roughly 87 % of the dataset.
A retail vial at 99.75 % is worth more evidentially than a selected vial at a higher figure. That is the whole argument for recording provenance at all.
Showing 12 distinct comments of 175 annotations by this handle.