99.92 % is normalised area, so it is silent on how much peptide is in the vial. Content and water are the numbers that answer that, and both are on this record. Purity is the good news; content is the actionable news.
plate_count
Column efficiency as a report-acceptance criterion.
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
201
n=201
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.
Plate count on this run supports the separation claimed. A high purity figure from an inefficient column is a merged peak reported as a clean one; that is not what happened here.
Core-shell packing at 2.6 µm gains roughly 40 % in resolution over a 5 µm fully porous bed at the same length and pressure. On a pair this close, that is the difference between two peaks and one.
The resolution figure sits in the system-suitability block with no PASS or FAIL beside it. That is deliberate: the index reports it and adjudicates nothing against it.
99.53 % is normalised area, so it is silent on how much peptide is in the vial. Content and water are the numbers that answer that, and both are on this record. Purity is the good news; content is the actionable news.
Where the plate count is low the resolution figure is low for a reason that has nothing to do with the impurity profile. Read the two together or read neither.
Purity 99.34 % with aspartimide (−18 Da) at 0.37 % nearby. Read the pair together: the purity figure and its nearest neighbour are two views of one integration decision.
Efficiency is the lever that does not change selectivity, so it improves resolution without moving anything else. Longer column, smaller particle, or lower flow, in that order of cost.
99.30 % is normalised area, so it is silent on how much peptide is in the vial. Content and water are the numbers that answer that, and both are on this record. Purity is the good news; content is the actionable news.
Purity at 99.41 % and water at 5.21 %: the two numbers are independent and both are needed. Excellent chromatography on a wet cake still yields less peptide per vial than the label implies.
99.80 % is normalised area, so it is silent on how much peptide is in the vial. Content and water are the numbers that answer that, and both are on this record. Purity is the good news; content is the actionable news.
Nothing adverse on this record. Purity 99.35 %, largest single impurity [D-Aib13]-diastereomer at 0.46 %, and a mass balance that closes. It is a clean record and the index has no note to add to it.
Showing 12 distinct comments of 201 annotations by this handle.