1003 Ergebnisse für: "Mobile phases and phase modifiers"

Supplier: Merck

Aluminiumoxid, γ-Phase

Supplier: Merck

Aluminiumoxid, α-Phase, Sigma-Aldrich®

Supplier: Merck

α-tri-Calciumphosphat (α-Phase), Sigma-Aldrich®

Supplier: Merck

Our NH₂, CN- and DIOL-modified silica sorbents are less polar then conventional silica phases, making them ideal for separating hydrophilic or charged substances. Our moderately polar cyano- and diol-modified silica plates can be used for both normal phase and reversed phase systems. An alternative to PEI cellulose, amino-modified NH₂ plates provide weak basic ion exchange characteristics with special selectivity for charged compounds.

Supplier: Merck

Siliciumnitrid α-Phase, Sigma-Aldrich®

Supplier: Merck

Solid phase extraction disks provides faster flow rates and exhibits less clogging than PTFE discs for the extraction of organic contaminants from drinking water samples.

Supplier: Merck

Nb₂AlC MAX phase is the precursor to revolutionary Nb2CTx MXene applications.
Technical prowess: Electrical conductivity: Nb2AlC serves as the precursor for Nb₂CTx MXene, showcasing remarkable electrical conductivity of 3,5×10⁴ S/cm.
Thermal conductivity: A thermal conductivity of 37,8 W/m·K ensures efficient heat dissipation, crucial for various engineering applications.
Hardness: With a vickers hardness of approximately 14,3 GPa, Nb₂AlC promises durability and resistance to wear.
Temperature stability: Operating at temperatures exceeding 1000 °C, Nb₂AlC finds applications in high-temperature environments like thermal barriers and heat exchangers.

Supplier: Merck

Titanium Aluminum Carbonitride MAX phase is an excellent MXene precursor; and can be processed by HF or HCl+LiF to obtain MXene.

Supplier: Merck

Mo2Ti₂AlC₃ is a 413 MAX phase, a precursor for cutting-edge applications. MXene nanosheets, a class of two-dimensional transition-metal carbides, are predicted to serve as high-performing anodes for non-lithium-ion batteries by combined first-principles simulations and experimental measurements. Further, Mo₂Ti₂AlC₃, a novel MAX phase, exhibits impressive thermoelectric properties, surpassing traditional ceramics. Its metallic transport behavior offers new possibilities in electronic applications. Additionally, Mo₂Ti₂AlC₃ serves as an efficient mode-locker for ultrafast fiber lasers, highlighting its versatility in photonics.

Supplier: Merck

Siliciumnitrid überwiegend beta-Phase ≤10 µm, Sigma-Aldrich®

Supplier: Merck

Polydimethylsiloxane + Polydiphenylsiloxane, ~500 mPa.s (25 °C) (1:1) DC-710 stationäre Phase für die GC, Supelco®

Supplier: Merck

The Ascentis® Express PCS-C18 columns are designed for effective separation of basic, acidic, or neutral compounds using low ionic strength (formic acid) mobile phase conditions.

Supplier: Merck

Brockmann aluminum oxides are suitable for column chromatography and adsorptive filtration. Aluminum oxides are generally used as solid support phases in solid phase extraction (SPE)-based clean-up procedures employed in chromatographic methods

Supplier: Merck

Silica based SUPELCOSIL™ LC-NH₂ columns separate monosaccharides, disaccharides, and some trisaccharides, with elution generally in order of increasing molecular weight. Retention decreases as the proportion of water:acetonitrile in the mobile phase is increased.

Supplier: Merck

MAX phases are a family of ternary carbides and nitrides that share a similar layered hexagonal crystal structure. They are so called because of their chemical formula: M(n+1)AXn where n = 1, 2, or 3, where M is an early transition metal, A is an element from the IIIA or IVA groups, and X is carbon and/or nitrogen class of materials. MAX phases combine attractive properties of both ceramics and metals, and has been suggested for potential applications in nuclear reactor. The specific activities of Ti₃AlC₂ and Ti₂AlC were found to be similar to SiC, and are three orders of magnitude less than Alloy 617 after 10 to 60 years decay for all three activation times in both the fast and thermal spectra.

Supplier: Merck

NUCLEOSIL® C18 columns with octadecyl modified silica phase for HPLC.

Supplier: Merck

Tetrabutylammonium hydroxide (TBAOH) is a quaternary ammonium salt,mainly used as a strong base and phase-transfer catalyst.

Supplier: Merck

These screw cap valve (SCV) bags are suitable for calibration mixes - gas phase standards/gas mixtures.

Supplier: Merck

Promecarb may be used as a reference standard for the determination of promecarb in water by solid-phase extraction and liquid chromatography coupled with ionspray mass spectrometry.

Supplier: Merck

4-Hydroxy-4-methyl-2-pentanone may be used as an internal standard in the analysis of volatile odor-active compounds present in wine using solid phase extraction with gas chromatography (SPE-GC).

Supplier: Merck

Bisphenol E may be used as a reference standard in the determination of bisphenol E in beverages using on-line solid-phase extraction with fast liquid chromatography coupled with tandem mass spectrometry (on-line SPE fast LC-MS/MS).

Supplier: Merck

Clear, colorless fluid polymer useful as a stationary phase in gas chromatography and as an anti-foaming agent.

Supplier: Merck

Diese gebundenen Poly(5% Diphenyl/95% Dimethylsiloxan)-Säulen mit niedrigem Phenylgehalt verbessern die thermische Stabilität der Phase und sorgen gleichzeitig im Wesentlichen für eine Siedepunkt-Elutionsreihenfolge und eine leichte Erhöhung der Selektivität, insbesondere für aromatische Verbindungen.

Supplier: Merck

Purospher® RP-18 ist für die Trennung von problematischen basischen Verbindungen mit einfachen neutralen Eluenten vorgesehen. Außerdem ermöglicht Purospher® RP-18 die Trennung hydrophiler Verbindungen mit wässriger mobiler Phase. Purospher® RP-18 basiert auf einem hochreinen, metallfreien Kieselgel. Die mehrschrittige chemische Modifizierung und Deaktivierung der Oberfläche und das polare Endcapping ermöglichen eine Elution von basischen und chelatbildenden Verbindungen ohne Peaktailing. Purospher® RP-18 ist nicht für die Trennung saurer Verbindungen geeignet. Die gute chemische Stabilität von Purospher® RP-18 ermöglicht über einen langen Zeitraum den Einsatz einer mobilen Phase mit einem pH-Wert von 8.

Supplier: Merck

Diese Säulen liegen in ihrer Polarität zwischen den traditionellen nicht gebundenen Cyanosilikonphasen SP-2330 und SP-2340. Die hohe Polarität dieser Phase ermöglicht die Trennung geometrischer (cis/trans) Fettsäuremethylester-Isomere als Gruppe.

Supplier: Merck

Solid phase extraction vacuum manifolds allow to simultaneously process up to 12 or up to 24 SPE tubes. Precise flow control is provided through each SPE tube by rotating the independent, screw-type valves in the cover, this ensures the packing will not dry out in some tubes while others finish draining.

Supplier: Merck

Nicht modifizierte Celluloseplatten für die Analyse von polaren Substanzen.

Supplier: Merck

Ascentis^® Express ES-C18 is a non-endcapped C18 stationary phase based on the proven Fused-Core^® particle design.

Supplier: Merck

Magnesium matrix modifier for graphite furnace AAS.

Supplier: Merck

The MultiScreen® deep well solvinert filter plate is intended for a wide range of applications including total drug analysis, bead cleavage (solid-phase combinatorial chemistry and peptide synthesis), and sample preparation before high-performance liquid chromatography (HPLC)/ultraviolet (UV) and liquid chromatography-tandem mass spectrometry (LC-MS/MS). This filter plate is fully automation compatible.