Chromatografii, Sorbenty
Sorbenty napomáhají oddělování směsných sloučenin v jakékoli chromatografické metodě. Chromatografické sorbenty připravené k použití zjednodušují a urychlují postupy izolace, identifikace nebo purifikace. Sorbenty stacionární fáze jsou dostupné v různých velikostech částic nebo polaritách, aby odpovídaly chemickým a fyzikálním vlastnostem vzorkových sloučenin pro přesné výsledky. Chromatografické sorbenty mohou být dodávány s aditivy nebo bez nich, například se stabilizačními pojivy či fluorescenčními indikátory k vyrovnání obtížně viditelných ultrafialových oblastí.
Cellulose microcrystalline for TLC plates
Supplier: Merck
Cellulose microcrystalline, <20 µm, Balené: In plastic
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Bulk media for ion exchange chromatography columns, PL-SAX
Supplier: VARIAN
The PL-SAX media are well suited for anion exchange HPLC separations of proteins, peptides, and deprotected synthetic oligonucleotides. Denaturing conditions of temperature, organic solvent, and high pH levels are used for the oligonucleotide separations.
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Ion exchangers
Supplier: Merck
In general, ion exchangers consist of a cross-linked polymer matrix with a uniform distribution of fixed ionic groups sited throughout the resin structure. These must be balanced by a similar number of ions of the opposite charge, (counter ions) to maintain electrical neutrality. Cation exchangers therefore, exchange and enrich only cations, anion exchangers only anions. In contrast adsorber resins have a non ionic, but depending on the structure, a somewhat polar character, and don't adsorb stoichiometrically both: anions, cations, as well as uncharged compounds.
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Bulk packing material for preparative HPLC columns, SepTech™ C18 reverse phase media
Supplier: VARIAN
SepTech™ C18 bulk media, designed for high performance separations at high capacity. The two pore sizes, 60 Å and 150 Å, have been optimised to give high capacity for small molecules and larger natural molecules and peptides, respectively.
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Amphiathic resin for solid phase peptide synthesis, AmphiSpheres™
Supplier: VARIAN
Strongly basic anion exchanger, Cl⁻ form. Moist, light yellow spherules.
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Bulk media, PLRP-S
Supplier: VARIAN
The PLRP-S reversed phase HPLC media delivers the pure oligonucleotides (oligos) required for genomics applications, including quantitative PCR, microarrays, and gene synthesis assays.
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Silica gels for TLC and PLC plates, standardised
Supplier: Merck
Selection of standardised and modified silica gels that are available in many granulations and supplied from one single source, dedicated to chromatography. Standardised silica gels are widely used in separation processes to purify valuable compounds in ton quantities.
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Resin, PL-AMS, StratoSpheres™
Supplier: VARIAN
Aminomethylstyrene resin is a particularly versatile material suitable for the attachment of a variety of spacers, handles and linkers (for use in solid phase synthesis).
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Resin, PL Cl-Trt-Cl, StratoSpheres™
Supplier: VARIAN
PL Cl-Trt-Cl supports peptide synthesis using the Fmoc approach. This resin can be used for the synthesis of a wide range of organic acids, and has also been used for the synthesis of amines, phenols and other alcohols.
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Resin, PL-Wang, StratoSpheres™
Supplier: VARIAN
PL-Wang is a 4-alkoxybenzylalcohol functionalised polystyrene, prepared from copolymerised PL-CMS, for solid phase peptide synthesis using Fmoc protection strategies and is cleaved using ~ 95% TFA. Particularly useful for solid phase synthesis of small molecules which have a carboxylic acid functional group.
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Silylation reagents
Supplier: Thermo Fisher Scientific
Trimethylsilyl N-trimethylsilylacetamidate, pyridine for GC, BSA:Pyridine, 25 ml
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