Analytical Techniques & Spectroscopy — three ways to learn it.

The complete written lesson — qualitative vs quantitative analysis, the principles of chromatography, paper & thin-layer chromatography and the Rf value, column chromatography, solvent extraction and the distribution coefficient, and an introduction to spectroscopy (the EM spectrum, atomic spectra & flame tests, UV-visible and IR).

As you scroll, a live D3 panel animates every idea: the electromagnetic spectrum unrolling band by band, a pencil spot of mixed inks climbing a paper strip and separating into coloured bands with the Rf measured live, a TLC plate, a separating funnel partitioning a solute, and white light losing wavelengths to give an absorption spectrum.

Run a paper chromatography separation in 3D — a strip of paper with a single spot of mixed dyes hanging in a covered beaker of solvent. Advance the time, watch the solvent front rise and the mixed spot split into coloured bands, then plot distance vs time and read off each Rf with D3. Tap any part for an inspector + Ask AI.