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Expert insights on analytical chemistry, testing strategy, and quality operations.

Ion-Pairing HPLC: Using Interfacial Chemistry to Separate Difficult Ionic Compounds

Ion-pairing HPLC is a powerful strategy for analyzing highly polar or permanently charged compounds that are difficult to retain by conventional reversed-phase methods. This article explains the fundamentals of ion-pairing on C18 columns, using diquat as a practical example of how interfacial chemistry, mobile-phase design, and method control can turn a challenging ionic analyte into reliable, decision-ready data.

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NMR for QC and Product Development: Practical Structural Insight Across Regulated and Complex Chemical Products

Nuclear Magnetic Resonance (NMR) spectroscopy is one of the most powerful analytical tools available for confirming chemical identity, assessing purity, and supporting product development. Unlike techniques that focus mainly on targeted components, NMR provides a broad structural view of a material. That makes it especially valuable when the question is not just “Is the target present?” but also “Is this the right molecule, in the right form, at the right quality?”

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