USP L18 column: Amino + cyano on silica
Porous silica of 3-10 um bonded with both amino and cyano groups.
Mode: normal-phase Typical pH range: about 2-8 (silica base)
Typical uses
- Normal-phase separations of polar compounds
- Sugar-type separations
Common sizes (length x internal diameter, particle size)
- 250 x 4.6 mm, 5 um
- 150 x 4.6 mm, 5 um
Tender wording (brand-neutral)
HPLC column with USP L18 packing (Amino + cyano on silica), 250 x 4.6 mm, 5 um (length x internal diameter, particle size); stainless-steel or equivalent hardware with standard fittings; recommended pH and temperature range to be stated by the bidder; each column supplied with its certificate of analysis and test chromatogram, batch/lot number and serial number; shelf life not less than 2 years from delivery; any make meeting the USP L18 designation and the stated dimensions is acceptable.
Size:
Changing length or particle size
You can keep the USP L18 packing and use a different length, particle size or diameter within the harmonized USP 621 limits. Check your columns with the calculator.
Related column types
L3 Bare silica | L8 Amino (aminopropyl silane) | L20 Diol
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