شركت Waters يكي از بزرگترين شركتهاي فعال در زمينه تجهيزات پزشكي و گروماتوگرافي، انواع مختلفي از ستون هاي Analytical و Preparative (ستون هاي HPLC) را براي كاربردهاي مختلف ارائه مي كند. شرکت آروین تجارت پژوه آزما از طريق شركاي تجاري خود ميتواند تمامي محصولات شركت Waters را در كوتاه ترين زمان ممكن در اختيار مشتريان عزيز قرار دهد.
انواع مختلف ستون هاي Analytical شركت Waters به شرح زير مي باشد. براي اطلاع از جزئيات انها بر روي نام ستون كليك نماييد.
Symmetry HPLC Columns
Symmetry® Columns exceed the standards for HPLC column performance. To ensure their optimum performance, they are packed with high-purity silica using stringently controlled manufacturing processes. No other silica-based LC column brand can match the column-to-column and batch-to-batch reproducibility of Symmetry Columns.
■ Symmetry C18 and C8 Columns deliver maximum reproducibility
■ SymmetryShield™ RP18 and RP8 Columns provide superior peak shape
■ Symmetry300™ C18 and C4 Columns offer high recoveries of peptides and proteins
The bonded phases of Nova-Pak® Columns, available in 4- and 6 µm particle sizes, offer high resolution and fast, efficient chromatography. When used with relatively short column lengths, the smaller particles reduce solvent consumption while retaining their ability to resolve complex mixtures. Steel analytical columns packed with 4 µm particles are available in 75-, 150-, and 300-mm lengths. Packed with high efficiency 6 µm particles, semi-preparative Prep Nova-Pak HR Columns provide an unparalleled range of separation possibilities. Their faster separations produce concentrated fractions, and they require less solvent, significantly reducing costs.
Waters makes the only column that contains the µBondapak® C18 packing material. Other column manufacturers claim their products exhibit “µBondapak-like” selectivity. Yet none of them ever passed Waters’ stringent QC batch tests. Since 1973, µBondapak and Bondapak® packing materials have demonstrated year-to-year reproducibility, which is why µBondapak remains among the most frequently referenced column brands.
XBridge BEH HPLC Columns
XBridge BEH HPLC Columns are designed for one purpose—to maximize productivity. Whether you are creating a quality-control method or developing a leading-edge LC-MS assay, XBridge Columns are an invaluable help.
■ They improve pH stability, increasing column lifetime
■ They improve column reliability, ensuring the ruggedness of assays
■ They improve particle efficiency, providing unmatched peak shape and capacity
With 10 general-purpose, application-specific sorbents and the widest range of particle sizes available, no other HPLC column family offers the tools you need to meet the most demanding chromatographic challenges. Whether you require robust HPLC methods, seamless UPLC transferability, or preparative scaling for product isolation, count on the versatility of an XBridge Column.
XSelect HPLC Columns
XSelect HPLC Columns are designed for the method-development scientist who requires a diverse selection of sorbents to easily separate the most difficult analyte co-elutions.
XSelect Columns are:
■ Designed for selectivity, improving the separation of closely eluting peaks
■ Intended for isolation and purification, loading the highest analyte mass of any columns
■ Ideal for rapid method development, reducing the time and cost spent developing methods
The base particle, or substrate, critically influences analyte selectivity; the bonded ligand influences selectivity to a lesser extent. Neither the substrate nor the ligand alone provides dramatic selectivity changes. Yet in combination they provide the ultimate means of enhancing analyte selectivity, while ensuring reproducible and robust methods. Accordingly, the XSelect Column family offers the unique optimization of bonded ligands embodied in the technologies of high strength silica (HSS) and charged surface hybrid (CSH).
Atlantis HPLC Columns
For polar compounds, Atlantis HPLC Columns provide exceptional performance, versatility, and retention. The balanced retention of Atlantis Columns affords the separation of polar and non-polar analytes while providing:
■ Compatibility with 100% aqueous mobile phases
■ Polar-compound retention without ion-pairing reagents
■ Long column life when used with mobile phases of low pH
SunFire HPLC Columns
SunFire Columns set the standard for state-of-the-art bonded C18 and C8 silica HPLC columns.
Benefiting from years of research and product development, SunFire Columns deliver industryleading levels of chromatographic performance, representing the best in particle and bonding expertise.
SunFire Columns offer:
■ Excellent low-pH stability
■ High chromatographic efficiency
■ Superior peak shapes for charged analyte species
XTerra HPLC Columns
XTerra MS, Shield RP, and Phenyl Columns combine the best properties of silica- and polymeric-bonded phases with patented Hybrid Particle Technology (HPT), which replaces one out of every three silanol groups with a methyl group during particle synthesis. HPT overcomes the limitations of silica-based materials while maintaining its best attributes for mechanical strength, chemical resistance, and easy scale-up from analytical to preparative chromatography.
Waters Spherisorb Columns
Waters Spherisorb® Columns are produced in a wide range of particle sizes (3, 5, and 10 µm) and bonded phases. Their high quality bonded phases afford many
different and unique separation selectivities. Analytical columns are supplied with industry-standard, Parker-style, column end-fittings.
The non-endcapped Resolve Packing is significantly different compared to other Waters packing materials. The change in chromatographic behavior is most commonly noticed with polar compounds, which are typically more retained. For basic compounds, ion-pairing reagents are added to the mobile phase to reduce excessive tailing.
Delta-Pak™ Columns are ideal for separating and isolating peptides, proteins, and natural products. Optimized for large-molecule separations and available in two pore sizes, they provide consistent and predictable scaling, from milligram quantities to gram quantities, between column formats.
µPorasil™ and Porasil™ particles were one of the first commercially available, fully porous packing materials used for LC separations. In contrast to the reversed-phase separation ability of µBondapak C18, the non-bonded, silica-based material in µPorasil Columns was produced to provide normal-phase separations for a wide array of sample types.
Shodex RSpak Polymer Reversed-Phase Columns
Shodex RSpak Columns are packed with porous polymeric particles that remain stable in a pH range of 2–12. Similar to conventional polymer-based materials, the DS-613 sorbent works well with samples that are more hydrophobic than hydrophilic, and which, consequently, require relatively high concentrations of organic modifiers. DE-613 columns, with a polymethacrylate packing, are more hydrophilic than hydrophobic, and work well with mobile phases containing relatively high concentrations of water. The least hydrophobic sorbent is used for the DE-613 columns. For weakly cationic species, the DC-613 column is a cation exchanger with unique selectivity (mixed-mode, ion-exchange, and reversed-phase partition chromatography).
Waters PAH Columns
Waters PAH Columns are optimized for the HPLC analysis of polyaromatic hydrocarbons to achieve baseline resolution for 16 target analytes in fewer than 25 minutes. These columns are available in seven dimensions (including a capillary format) and two particle sizes. A complete certificate of analysis accompanies each, backed by world-class ISO 9002-registered documentation.
Waters IC-Pak resin-based columns separate a full range of ions from complex sample matrices. They offer an exceptional linear loading range, from less than 1.0 ppb to greater than 400 ppm, without dilution and without pH limitations on eluent or sample.
Recommended IC-Pak Columns:
■ IC-Pak Anion Columns, for analysis of inorganic anions
■ IC-Pak Ion-exclusion Columns, for weak acid anions and organic acids
■ IC-Pak Cation Columns, sulfonated styrene-divinylbenzene based resin, for monovalent and divalent cation analysis
■ IC-Pak C M/D Columns