HAISIL HL C18: Often, a chromatographer needs to support the high sample throughput demands of real-time process control or large volume production monitoring. When maximum selectivity, high efficiency, and fast analysis times are called for, HAISIL HL (high load) C18 is a good choice. The high surface area (300m2/gm) of the 100Å pore size silica used for HAISIL HL permits high weight/weight carbon loading yet the same desirable monomeric characteristics of our HAISIL 100Å, 120Å, and 300Å materials are maintained.

Diet Cola Additives: Beverage additive analysis is not only an important industrial application, but it also serves as a practical and relatively simple procedure for introductory HPLC courses. Industry is increasingly driven by rapid analysis requirements and an HPLC column can represent an overwhelming expense in a teaching environment. The diet cola analysis in the chromatogram to the left illustrates an extremely fast analysis on an extremely inexpensive HPLC column. A package containing five of the 20x2.1mm cartridge column used for this analysis costs about half as much as a moderately priced HPLC column. And, there's no need to pre-filter the cola sample through a 0.5µm filter as some column manufacturers recommend when using their expensive columns packed with 2µm particles for this analysis!

Synthetic Peptides, Inc. HPLC Peptide Standards for Reverse Phase on the HAISIL HL C18 Column: The aromatic hydrocarbons that most HPLC column manufacturers use to quality control columns render little information about a column's selectivity and performance characteristics for peptides. The Canadian corporation, SPI, produces a well characterized yet challenging peptide mixture that is very useful for quantifying HPLC column performance for peptides. The difficult to separate first pair of peptides are resolved to near base line on HAISIL HL C18 columns. Many so-called peptide analysis columns are unable to separate this pair.

Other HAISIL HL Chromatograms:

Water soluble vitamins	Cartridge Columns for LC/MS	Very basic compounds in combinatorial mixtures

The following HAIPEEK and HAICART Guard Cartridges are compatible with HAIPEEK guard holders and the PE Brownlee NewGuard™ Holder.

The following HAIPEEK and HAICART Analytical Cartridges are compatible with HAIPEEK   holders and  PE Brownlee MPLC™ Holders.