Best Lab Thin Layer Chromatography TLC Plates AI pick
Chosen by an AI model from its trained knowledge, with its reasoning.
AI pick (line): MilliporeSigma (Supelco) TLC Silica gel 60 F254
Merck/Supelco silica gel 60 F254 is the de facto standard plate that most published TLC methods and Rf values are based on.
Not for: Anyone separating very polar or reverse-phase analytes, who needs RP-18, cellulose or other specialty layers instead.
AI picks by need
For glass-backed scored plates
Analtech Uniplate (line)
These glass-backed plates are flat, rigid and heat-tolerant, which suits charring stains and preparative work.
Not for: Users who want to cut plates to size with scissors.
For plastic-backed plates you can cut
Macherey-Nagel Polygram SIL G/UV254 (line)
The polyester backing cuts cleanly with scissors and does not shed layer as easily as aluminium sheets.
Not for: Anyone charring plates with heat or strong acid stains, which the plastic backing will not tolerate.
What the AI looks for in Lab Thin Layer Chromatography TLC Plates
- Backing
- Glass for heat or charring and preparative work. Aluminium for cut-to-size reaction monitoring. Plastic for cutting when heat staining is not needed. Backing decides which visualization methods you can use and how easily you can size plates.
- Fluorescent indicator
- F254 (UV254) for UV-active compounds. F254 lets you see aromatic and conjugated compounds as dark spots under a 254 nm lamp without staining.
- Layer thickness
- About 0.2 to 0.25 mm for analytical TLC. Thicker layers, roughly 0.5 to 2 mm, are for preparative TLC. Thick layers load more sample but give broader spots, so the wrong thickness costs either resolution or capacity.
- TLC vs HPTLC
- Choose HPTLC plates (finer particles, thinner layer) for quantitative or densitometric work. HPTLC gives sharper spots and better reproducibility over shorter run distances.
- Stationary phase
- Silica gel 60 by default. Alumina, cellulose or RP-18 only when the chemistry calls for it. The phase determines selectivity. Silica covers most normal-phase organic work.
Brands that matter
- MilliporeSigma / Supelco (Merck): Reference silica gel 60 plates, plus HPTLC and RP-18 lines.
- Macherey-Nagel: Broad range, including Polygram plastic-backed and Alugram aluminium sheets.
- Analtech: Glass-backed Uniplates, including scored and preparative formats.
- CAMAG: HPTLC systems vendor. Plates are used mainly within its workflow.
What to avoid
- Unbranded plates with uneven layers that flake when spotted or cut
- Plastic-backed plates when you plan to heat-char or use hot acid stains
- Plates stored open in humid air without reactivation before critical runs
Questions
Should I activate plates before use?
For reproducible Rf values, briefly heat plates that have sat in humid air. Absorbed water lowers silica activity. For routine reaction monitoring this is usually skipped.