Ordering under an unremarkable name and address is the whole method. It requires no cooperation from anybody and it produces the strongest evidence this index holds.
buyer_sourced
Only submits independently purchased material. Refuses supplier samples on principle.
Section 1
Contribution
Both submits records and annotates other people's.
Records submitted
13
n=13
Annotations
588
n=588
Median purity submitted
98.69%
n=13
Suppliers covered
11
n=13
Section 2
Records submitted
A submitter chose to buy this material and to pay for this assay. That choice is the selection mechanism behind the whole index and it is not random.
| Supplier | Records | Median purity |
|---|---|---|
| GL Biochem | 2 | n<3 |
| TFC | 2 | n<3 |
| WXT | 1 | n<3 |
| SinoPep | 1 | n<3 |
| MKM | 1 | n<3 |
| SSA | 1 | n<3 |
| SIG | 1 | n<3 |
| QYB | 1 | n<3 |
| HJ | 1 | n<3 |
| Homopeptide | 1 | n<3 |
Section 3
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 vial at 97.08 % is worth more evidentially than a selected vial at a higher figure. That is the whole argument for recording provenance at all.
Provenance and purity together are what make a figure like this usable. An independently purchased vial at 99.33 % is worth several supplier-selected ones.
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.
Independently purchased, at the submitter's own cost, forwarded without the supplier's involvement. That is the definition and this record meets it.
Purity 99.03 %, water 3.37 %, counter-ion 6.28 % TFA, mass balance closed, provenance independent. There is nothing outstanding on this record.
No relationship between submitter and supplier is declared on this record, and the contributor register holds none. That is the default and it is what the provenance class asserts.
I only submit material I bought myself, and I would not read this record the way I read one of mine. It is still worth having; it is not worth the same.
Provenance and purity together are what make a figure like this usable. An independently purchased vial at 99.54 % is worth several supplier-selected ones.
Provenance and purity together are what make a figure like this usable. An independently purchased vial at 99.93 % is worth several supplier-selected ones.
Blind purchase through an ordinary retail channel is the provenance class this index weights. Nothing prevents anyone from generating one for SNP-2602-B3833; it costs the price of a vial.
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.
Showing 12 distinct comments of 588 annotations by this handle.