March 2023

When can analyte retention deviate from what is expected or normal? We explain three subtle causes.

On a fundamental level, equilibrium and diffusion define chemical separations. Practical applications of partition coefficients to chromatographic sample preparation illustrate this point.

Understanding the relationship between selectivity and retention is key to realizing excellent gas chromatographic separations.

As our knowledge about PFAS in food continues to develop, and regulations evolve, we must continue to refine our analytical methods.

Increasing inclusivity and equity in chemistry will require a positive instructor mindset, as well as invention, exploration, and trials.

Two-dimensional gas chromatography (GC×GC) and chemometrics are leading the way in new strategies on multivariate data analysis. Using GC×GC in untargeted analysis reveals how far the technique has advanced the field of separation science.