Salt exchange
Converting a peptide from one counter-ion to another, typically trifluoroacetate to acetate, by repeated lyophilisation from the new acid or by ion exchange. Rarely complete.
Related terms
- Counter-ion
- The anion paired with a peptide's basic residues in the isolated salt. Usually trifluoroacetate or acetate. Mass in the vial that is not peptide.
- Salt form
- Which counter-ion the compound was isolated as. Trifluoroacetate is 114 Da per site; acetate is 60. At equal purity, acetate vials contain more peptide.
see also Trifluoroacetic acid (TFA) · Salt form
see also Counter-ion
Where this term appears
The glossary exists to make record pages readable without a chemistry degree. Every technical term on a report resolves here.
- Assay report records — the term appears in result tables, peak tables and provenance blocks
- Method references — where the measurement behind the term is defined
- All 21 glossary terms beginning with S