Chromatography
Filtro
2in1 KITs contain short thread vials ND9 (1.5 ml) with a wide opening and screw caps in a blue PP box.
Analytical column system manufactured from stainless steel M 8 outer threads on both ends combination of sealing element and very fine-meshed stainless steel screen, PTFE sealing ring and fitting adaptor column heads SW 12 with inner threads M8 x 0,75 and UNF 10-32, as built -in guard columns use ChromCart® guard column cartridges with 8mm length with the guard column adaptor EC, packed with NUCLEODUR® spherical silica.
For improved volatility, better thermal stability or low limit of detection in gas chromatography prerequisite: quantitative, rapid and reproducible formation of only on derivative halogen atoms introduced by derivatisation (e.g. trifluoroacetates) allow specific detection (ECD) with the advantage of high sensitivity elution order and fragmentation patterns in MS can be influenced by a specific derivatisation.Which is the proper reagent for acylation?Test kit for determination of the optimum acylation.
For improved volatility, better thermal stability or low limit of detection in gas chromatography prerequisite: quantitative, rapid and reproducible formation of only on derivative halogen atoms introduced by derivatisation (e.g. trifluoroacetates) allow specific detection (ECD) with the advantage of high sensitivity elution order and fragmentation patterns in MS can be influenced by a specific derivatisation.Acylation with fluorinated acid anhydrides can be used for alcohols, phenols, carboxylic acids, amines, amino acids and steroids forming volatile, stable derivatives suited for FID as well as for ECD detection.by-products of acylation with anhydrides: corresponding acidsexcess reagent and the acid formed have to be removedHeptafluorobutyric acid anhydride (HFBA)m.w. 410.06, Bp 106 - 107°C (760mm Hg),C3F7 - CO - O - CO - C3F7density d20°/4° = 1.665
For improved volatility, better thermal stability or low limit of detection in gas chromatography prerequisite: quantitative, rapid and reproducible formation of only on derivative halogen atoms introduced by derivatisation (e.g. trifluoroacetates) allow specific detection (ECD) with the advantage of high sensitivity elution order and fragmentation patterns in MS can be influenced by a specific derivatisation.Acylation with fluorinated acid amides is recommended for alcohols, primary and secondary amines as well as for thiols under mild, neutral conditions. MBTFA also forms very volatile derivatives with carbohydrates.by-products: corresponding neutral acylamides, which can be easily removed due to their high volatility; because of neutral conditions and favourable chromatographic properties often removal of the bisacylamide is not necessary. Thus sample preparation is much more convenient.MBTFA / MBHFBAN-methyl-bis(trifluoroacetamide) MBTFAm.w. 223.08, Bp 123 - 124°C (760mm Hg), density d20°/4° = 1.55,CF3 - CO - N(CH3) - CO - CF3Due to their purpose, derivatisation reagents are very reactive substances. For this reason they should be stored cool and protected from moisture.The derivatisation reagents are supplied in vials with crimp caps for easy access with a syringe. Vials with pierced sealing disks have limited stability and should be used soon.
Silica 60, specific surface (BET) ~ 500m²/g, mean pore size 60Å, specific pore volume 0.75ml/g, particle size 5 to 17µm. Outstanding hardness and abrasion resistance due to an optimized binder system. Increased separation efficiency due to an optimized particle size distirbution. High suitability for trace analyses resulting from a UV indicator with brilliance and a low-noise background of the layer.Available as glass plates with or without fluorescent indicator (UV254).
For space saving mounting on b.safe Waste Caps.
Extension GL25 connection.
For assembly of an exhaust filter on a capillary connection.
For installation of capillaries at exhaust filter connection of b.safe Waste Caps. The adapter made of PE-EX is conductive.
Space problems in the lab? Use the adapters for the exhaust filter to gain more free space. Attach the exhaust filter in any position - perfect when dealing with lower installation heights.
For compressed air supply of Precision nitrogen and zero air generators for the GC.For simultaneous supply of nitrogen and zero air generators in one stackCan be stacked and combined with all Precision modulesVery quiet and low-vibration operationWith maintenance and repair status displaysScope of supply: 3 m PTFE tubing, 2 x 1/4" compression fitting, 1/4" tee compression fitting, 2.5 mm hex key, mains power cable for EU, UK and US
Air valves prevent the formation of vacuum in HPLC bottles.PTFE membrane1/4"-28 thread portWith timestrip sticker