Testing & Analytics
HPLC purity testing for research peptides: what the percentage means
Reverse-phase HPLC reports purity as area percent: a proportion of what the detector saw, not a proportion of what is in the vial. The difference matters.
Mass spectrometry and peptide identity: what a mass match does and does not prove
A mass match is strong evidence that a peptide is what it is labelled as. It is not proof of sequence, and the distinction is worth understanding.
What is analytical testing, and why does it matter here?
Laboratory measurement of what a sample actually is and how much of it is the intended compound: the basis of every lot record.
Identity, purity and assay: what a reference standard is for
Identity confirms which molecule is present; purity measures how much of the sample is that molecule; assay measures how much compound is actually there. A reference standard is what calibrates the measurement.
How do I read a chromatogram, and does 99% purity mean the vial contains 99% of its labeled amount?
A chromatogram shows peaks over time; retention time identifies a substance and peak area indicates relative amount. Purity is not the same measurement as fill content.
Which analytical tests does NuePharma actually use?
Every lot record documents an identity result and a purity result, with the specific method named on that lot's own record.
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