Beyond GPC: Using Light Scattering for Absolute Polymer Characterization
While conventional calibration for gel permeation (GPC) and size-exclusion chromatography (SEC) are useful for polymer characterization, there are inherent disadvantages in these analyses. Adding multi-angle light scattering (MALS) detection can help overcome the challenges faced with single-detector chromatography. For more complex polymers, asymmetric flow field-flow fractionation (AF4) offers additional capabilities. This e-book explains what you need to know about using MALS in polymer analysis.
Gas chromatography-mass spectrometry (GC-MS) coupled with headspace solid-phase microextraction )HS-SPME) links cocoa variety to chocolate aroma and flavor profiles.
Kirstine Nielsen of Aarhus University (Denmark) discusses how targeted metabolomics ratios helped build a robust bloodstain time-since-deposition tool.
Gérard Hopfgartner explains how atmospheric pressure photoionization can generate radical cations in LC–MS, unlocking EI-style spectra and NIST's spectral library.
LCGC International spoke to Akina Nara of Japan’s Tohoku Medical and Pharmaceutical University about a new study which links a blood compound to how long a body has been dead.