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4 resourcesPurity, Identity, and Quantity
Purity, identity, and quantity may appear side by side on a laboratory report, but they answer three different analytical questions. This guide explains what each result supports, why a high purity percentage does not establish identity or net content, and which method details, units, and supporting evidence deserve closer review.
Why Lot and Batch Numbers Matter
Learn how lot and batch numbers connect physical research materials with COAs, sample identifiers, inventory records, and supporting documentation. This guide explains identifier matching, upstream and internal lot mapping, sampling limitations, traceability red flags, and how to verify that a report applies to the material in hand. Provided for educational and informational purposes in a laboratory research context only. No medical, dosage, administration, or clinical guidance is included.
HPL vs Mass Spectrometry
Learn how HPLC and mass spectrometry answer different analytical questions, why the methods complement one another, and what their results can—and cannot—establish. This guide explains chromatographic relative purity, retention time, peak area, mass-to-charge ratio, observed versus theoretical mass, and common interpretation mistakes. Provided for educational and informational purposes in a laboratory research context only. No medical, dosage, administration, or clinical guidance is included.
How to Read a Certificate of Analysis
Not every Certificate of Analysis tells the same story. This practical guide explains how to review lot numbers, laboratory and report identifiers, HPLC purity, mass-spectrometry identity, net-content results, and quality attributes that require separate testing. Learn what a COA can confirm, what it cannot establish, and which red flags deserve a closer look. Provided for educational and informational purposes in a laboratory research context only. No medical, dosage, administration, or clinical guidance is included.