SpectraLab Gel DVB RP & DVB C18 RP Columns

Rugged-100% Divinylbenzene packing for use at high temperatures and high pressure 8,000 psi and most solvents Molecule Range 100-10,000 Powerful-High pore volume for greater resolution Efficient-high plate counts for sharp, symmetrical peaks Wide range pH of 1 to 14 Versatile-Multiple surface chemistries for organic and water-soluble polymers

SpectraLab DVB RP, Particle Size 5µ, Pore Size 500 Å

SpectraLab DVB-C18 RP, Particle Size 5µ, Pore Size 500 Å

The SpectraLab DVB-RP liquid chromatography columns use a highly crossed-linked divinylbenzene polymer packing material. This material is extremely stable and permits use of solvents from pH 1 to pH 14.
Solvent systems utilizing either 0.lN HNO3 or 0.1N NaOH are compatible with the column. No column degradation has been seen with use of these solvents over weeks of use. This high stability also allows use of NaOH to flush pyrogens from the column and for column clean-up.

SL Reversed Phase columns are extremely rugged with pressure limits of the packing material above 8,000 psi. The packing is very hydrophobic because of its chemical makeup and large surface area;- it will retain highly polar samples not ordinarily retained and separated on C 18-bonded packings, e.g. carbohydrates.
Because of the high surface area of the packing material, addition of an organic compound to the solvent system is required to elute most materials from the column. The highly cross-linked packing material does not restrict the choice of organic compounds; acetic acid, formic acid, pyridine, dimethyl sulfoxide, tetrahydrofuran, and acetone have all been used successfully.
SpectraLab Reversed Phase columns work extremely well with paired ion techniques used to separate both organic and inorganic ions based on hydrophobicity of the packing material.

The SpectraLab DVB C18 is recommended for applications that require C18 columns. The C18 chains are bonded to the DVB backbone in such a way that they are not cleaved by harsh mobile phases. This allows column cleaning and regeneration with strong acids, strong bases, and organic solvents. C18- DVB columns are more hydrophobic than silica-based C188 columns and have different selectivity for polar compounds due to the absence of silanols on the underlying DVB. SpectraLab CI8-DVB has a500A pore size and5µ particle size.

Normal Phase GBR-DVB( email us) packings are rugged, hydrophilic packings for separating polar compounds. They equilibrate more quickly than silica based columns which is especially important when used for normal-phase gradients. This can decrease analysis time significantly. Like all SpectraLab columns they have a pH range of 0 to 14 and are compatible with all organic solvents. Mobile phases consisting of aqueous buffers, 1.0M NaOH, 0.1 M HNO3, alcohols, acetonitrile, THF, and DMSO have been used with this column. GBR-DVB columns have a 5µ particle size and 500A pore size.

Hydroxylated DVB RP( email us) for polar compounds with unique selectivity and able to run with pure water

Polyamine-DVB( email us) columns for simple sugar and polysaccharides provides a non-reactive amine surface and produces columns that last longer and equilibrate faster than silica-based amine columns. Aqueous mobile phases do not degrade the amine bonded phase as with silica-based columns. In fact, the column can be cleaned with 1.0 M NaOH. The Polyamine-DVB columns can be used with normal-phase gradients to sharpen peaks and reduce analysis times. Polyamine-DVB packings have a 5µ particle size and 500A pore size.

Anion Column( email us) with durable packing - extends column life, universal selectivity (suppressor-based or single column) and tolerates vigorous clean-up, the new Anion SAX column separates anions by both suppressor-based and single column IC methods. It separates fluoride, chloride, nitrite, bromide, nitrate, phosphate and sulfate in less than twenty minutes. Fluoride elutes well away from the water dip for easy quantification. Carbonate/bicarbonate or sodium hydroxide mobile phases are used for suppressor-based methods. Dilute p-hydroxybenzoic acid mobile phase is suitable for single-column applications.

The Anion SAX's rugged polydivinylbenzene backbone tolerates pressures, solvents and pH's that destroy standard anion columns. Use the column at any pH between 1 and 14, at pressures up to 6000 psi and with up to 100% organic mobile phases. This resilient column degrades less during use and tolerates vigorous clean-up when contaminated. The result? They last longer than any other anion column, with universal selectivity, high resolution, and extreme durability. The Anion SAX is the first choice for single-column and suppressor-based anion analysis.