Mass, retention and impurity profile all agree on this record. Three independent constraints pointing the same way is the strongest identity evidence the index publishes.
sodium_adduct
Alkali adducts, their sources, and why they are not impurities.
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
174
n=174
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.
Identity confirmed and purity at 99.52 %. The two answer different questions — what it is, and how much else is in it — and a record carrying both is the version worth citing.
An unrecognised sodium adduct shifts an apparent monoisotopic mass by about 22 Da, which at this molecular weight is far more than -15.2 ppm. Rule that out first; it is the cheapest check available.
Adduct bookkeeping on this one is tidy. The sodium series is present at the expected intensity ratio and has not been counted as an impurity, which happens more often than it should.
Identity confirmed, purity 99.93 %, mass balance closed. This record is complete against the index definition of complete and there is nothing outstanding on it.
Identity confirmed and purity at 99.81 %. The two answer different questions — what it is, and how much else is in it — and a record carrying both is the version worth citing.
Identity confirmed and purity at 99.48 %. The two answer different questions — what it is, and how much else is in it — and a record carrying both is the version worth citing.
The index records this as identity not established. That is a statement about the evidence, not about the material, and the distinction is the whole reason the status vocabulary has four values instead of two.
An unrecognised sodium adduct shifts an apparent monoisotopic mass by about 22 Da, which at this molecular weight is far more than +22.2 ppm. Rule that out first; it is the cheapest check available.
Identity confirmed, purity 99.48 %, mass balance closed. This record is complete against the index definition of complete and there is nothing outstanding on it.
Identity confirmed, purity 99.80 %, mass balance closed. This record is complete against the index definition of complete and there is nothing outstanding on it.
An unrecognised sodium adduct shifts an apparent monoisotopic mass by about 22 Da, which at this molecular weight is far more than -33.7 ppm. Rule that out first; it is the cheapest check available.
Showing 12 distinct comments of 174 annotations by this handle.