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Product innovations from Whatman have made thin layer chromatography (TLC) a practical laboratory tool for both qualitative and quantitative analysis.

Features and benefits
ㆍStringent quality standards assure a consistent level of resolution, accuracy, and reproducibility
ㆍMultiple samples and standards can be run simultaneously under identical conditions
ㆍWide range of chemistries and sizes to suit your application needs
ㆍSample preparation is simplified because plates are disposable
ㆍMobile phase need not be compatible with detector
ㆍAvailable with fluorescent indicator for easy detection of many UV-absorbing compounds

Linear-K: Fast, Accurate Spotting
Whatman pioneered the linear preadsorbent layer for easy, rapid, and accurate sample application. The layer actually acts as a sponge to preconcentrate the sample before it interacts with the silica layer. In order to facilitate sample application and the preconcentrating power of the preadsorbent layer, Whatman made it thicker than the silica layer. This allows the analyst to apply sample in amounts never before attainable with standard TLC plates, and to apply dilute samples in less volatile solvents without sacrificing resolution.

Whatman TLC Product Types
Partisil K6 and K5 Absorption TLC Plates	Normal phase analysis and purification of most samples; recovery of analytes by scraping sample spots; analytical and preparative thicknesses
Partisil Reversed Phase TLC Plates	Reverse phase separations and 2-dimensional reverse/normal separations
Flexible TLC Plates	Cutting plates to custom sizes; recovery of analytes by cutting sample spots; normal phase or anion exchange
Diamond Series Silica TLC Plates	Normal phase; increased hardness and reflectance for resistance to solvents and reagents and for scanning densitometry
EH6 Extra Hard TLC Plates	Normal phase; very hard, smooth surface for writing on plate, high resistance to solvents and reagents
Partisil High Performance TLC Plates	Normal phase; small, uniform silica particles for maximum resolution and sensitivity

TLC Plates: Designations and Formats

Whatman has designed nomenclature as a simple and convenient way of distinguishing among the different types of plates. Using these letter codes it is easy to define any TLC plate, for example: PLK6DF = preparative K6 silica 60Å pore diameter featuring a channeled, fluorescent plate and the preadsorbent layer.

K Silica Gel	The symbol for silica gel is K (for Kieselgel), followed by a qualifying number. K5: 10 to 12 µm silica, of pore size 150Å; K6: 10 to 12 µm silica, of pore size 60Å.
HP High Performance	High performance silica is prefixed by the letters HP: HP-K 4.5 µm silica, pore size 60Å.
KC-2, KC-18 Reverse Phase	Reverse phase plates, with a bonded alkyl group, are represented by a K followed by the length of the alkyl chain: KC-18 10 to 12 µm silica, 60Å, octadecyl bonded phase
L Preadsorbent Layer	This compresses each sample into a narrow horizontal band. Hence, it is known as Linear-K; prefix L.
D Channeled Plates	2 mm channels of clear glass separate sample lanes, preventing crossover. D indicates division.
F Fluorescent Indicator	Fluorescent plates glow bright green under shortwave UV light. Samples that absorb UV at 254 nm show as dark, quenched spots
M Microscope Slide	Plate size 1" x 3", 2.5 x 7.5 cm
P Preparative Layer	Has 500 µm or 1000 µm thickness for large sample sizes