Why certificate counts and purity-result counts differ
A certificate archive can contain more documents than numeric purity results. An image-only report still belongs in the document inventory even when its result has not been transcribed. The useful denominator depends on the question: count all records when describing archive coverage, and count only valid numeric results when summarizing percentages.
For research use only. Not for human or veterinary use.
The Eon GHK-Cu archive snapshot used to build this page contains 14 certificate records and 13 numeric purity values. These are records in the source data, not a count of independently sampled production groups. Missing transcription does not establish that the original certificate lacks a result.
Audit the two denominators
| Issuing laboratory | Report | Purity in archive | Numeric-result count |
|---|---|---|---|
| Accurate Test Labs | 2609AFL1600.5468 | 99.93% | Included |
| Accurate Test Labs | 2609AFL1600.5467 | 99.92% | Included |
| Accurate Test Labs | 2608AFL1407.4940 | 99.88% | Included |
| Accurate Test Labs | Open certificate | 99.59% | Included |
| Freedom Diagnostics | Open certificate | 99.75% | Included |
| Freedom Diagnostics | Open certificate | 99.90% | Included |
| Not transcribed | Open certificate | Not transcribed | Excluded |
| Freedom Diagnostics | Open certificate | 99.78% | Included |
| Freedom Diagnostics | 2602180088 | 99.79% | Included |
| Freedom Diagnostics | 2602090002 | 99.538% | Included |
| Freedom Diagnostics | Open certificate | 99.86% | Included |
| Freedom Diagnostics | Open certificate | 99.786% | Included |
| Not transcribed | Open certificate | 99.634% | Included |
| Freedom Diagnostics | Open certificate | 99.95% | Included |
Download the records and field definitions (JSON). The numeric rule accepts only an unqualified percentage string. Missing or qualified values do not become zero.
Reading checklist
- Keep total records and numeric records separate
- State the rule used to include a result
- Link the underlying records rather than copying an unexplained total
Reference: HPLC peak-area purity.
Sources and further reading
External references explain terminology and methods. They do not certify Eon products or establish suitability for human or veterinary use.