CHROMABOND® QuEChERS extraction buffer mixes / clean-up mixes
QuEChERS method and pre-mixesWithin a few years after its devleopment by Anastassiades et al. the QuEChERS method has gained a leading position for determination of pesticide residues in food by GC-MS or LC-MS allowing rapid and cheap clean-up of strong matrix-contaminated samples.Standard clean-up of food samples10 g sample are homogenised with 10 ml acetonitrile. After adding the internal standard the sample is shaken with 4 g MgSO4 and 1 g NaCI and afterwards centrifuged. 1 ml of the supernantant is spiked with 25 mg CHROMABOND® Diamino and 150 mg MgSO4 and shaken again. After centrifugation the supernatant is injected into the GC/MS.Extraction mixtures for sample preparation for determination of pesticides in food samples.MACHEREY-NAGEL offers a number of individually weighed and pre-mixed buffers and extraction mixtures, specially composed for different sample matrices.Mix I and Mix II are extraction mixtures, Mix III to Mix VI are clean-up mixtures.The food samples will be extracted with either Mix I or Mix II.Afterwards they will be purified with one of the following mixtures:Mix III (samples with low fat content; e.g. apples, strawberries),Mix IV (moderate content of chlorophyll and carotinoids; e. g. carrots, lettuce),Mix V (high content of chlorophyll and carotinoids; e. g. bell peppers, spinach),Mix VI (high fat content; e. g. avocados).Every mix is prepacked in a 15 ml centrifuge tube. Pack of 50 pieces.
CHROMABOND® SA
Benzenesulphonic acid modified silica cation exchanger for SPE (SCX)Base material silica, pore size 60Å, particle size 45µm, specific surface 500m²/g, pH stability 2 to 8, benzenesulphonic acid modified silica, strongly acidic cation exchanger (capacity ~ 0.5meq/g). Adsorbent with hydrophobic and Π-Π interactions (benzene ring). Ion exchange of organic compounds from aqueous matrix. Elution of interesting compounds with solvent systems, which compensate the ionic and nonpolar interactions, e.g. methanolic HCl.Recommended application: amino acids, amines, chlorophyll, PCB.
CHROMABOND® SA/SiOH
Combination phase for SPE analysis of PCBSpecial combination phase:SA: strongly acidic cation exchanger based on silica with benzenesulphonic acid modification.SiOH: unmodified silica for removal of polar compounds.Recommended application: extraction of PCB from waste oil (hexane extract).
CHROMABOND® SB
Quaternary ammonium modified silica anion exchanger for SPE (SAX)Base material silica, pore size 60 Å, particle size 45 µm, specific surface 500 m²/g, pH stability 2 to 8. Silica modified with quaternary amine. Strongly basic anion exchanger (capacity ~ 0.3 meq/g). Not suited for very strong anions such as sulphonic acids, because these are difficult to elute.Recommended application: organic acids, caffeine, saccharin.
CHROMABOND® SiOH
Unmodified silica phase for SPEUnmodified, weakly acidic silica, pore size 60Å, particle size 45µm, specific surface 500m²/g, pH stability 2 to 8, very polar, adsorbs humidity from air, for this reason it should be kept well closed and if necessary dried before use due to its high affinity for polar compounds it should not be conditioned with polar (e.g. methanol) or water-containing solvents.Recommended applications: aflatoxins, chloramphenicol, pesticides, steroids, vitamins.
CHROMABOND® SiOH-H2SO4/SA
Combination phase for SPE analysis of PCBsH2SO4: H2SO4-impregnated silica phase for oxidation of accompanying compounds to ionic and/or polar compounds.SA: strongly acidic cation exchanger based on silica with benzenesulphonic acid modification for removal of ionic and sulphur-containing compounds.Recommended application: extraction of PCBs from oil with reference to German industrial standard DIN 51527, part 1. This combination column is used together with a SiOH column.
CHROMABOND® vacuum manifolds and accessories
For simultaneous preparation of up to 12 or 24 samples, replacement parts and accessories for special applications.Vacuum manifold complete consists of: glass cabinet with lid and lid gasket, removable needles on lower side of lid, vacuum gauge, control valve, valves and caps, variable rack.
CHROMABOND® XTR
Kieselguhr phase for liquid-liquid extractionBase material coarse-grained kieselguhr, large pore size, high pore volume, constantly high batch-to-batch quality, pH working range 1 to 13.Application: liquid-liquid extraction of highly viscous aqueous solutions such as physiological fluids (blood, plasma, and serum) in clinical chemistry, dyes in textiles, environmental and food analysis.Glass columns availlable on request.
CHROMAFIL® MULTI 96 filter plates
96-well polypropylene plates for simultaneous filtration of 96 samplesAdvantages of this high-throughput system are:economical by saving time and solventuse of multi-channel pipettors facilitates liquid transfer stepsreadily adaptable to all common automated/robotic handling systems -minimised dead volume (£ 40µl)membrane materials correspond to the respective CHROMAFIL® syringe filters
CHROMAFIX® C18
Octadecyl modified silica phase for SPE, not endcappedBase material silica, pore size 60 Å, particle size 45 µm for C18, specific surface 500 m²/g, pH stability 2 to 8 octadecyl phases, not endcapped, carbon content 14 % possesses more free silanols (SiOH), which allow secondary interactions with polar groups of the analytes.Recommended applications: non-polar compounds, pesticides.
CHROMAFIX® C18 ec
Octadecyl-modified silica gel phase for SPE, endcappedBase material: Silica, pore size 60 Å, particle size 45 µm, specific surface 500 m2/g, pH stability 2-8 octadecyl phases, endcapped, carbon content 14 %, non-polar, hydrophobic interactions with a wide variety of organic compounds.Recommended application: Non-polar compounds, aflatoxins, amphetamines, antibiotics, antiepileptics, barbiturates, caffeine, drugs, preservatives, fatty acids, nicotine, PAHs, pesticides, PCBs, heavy metals, vitamins.Very well suited for desalting of samples.
CHROMAFIX® Dry
Special phase for drying organic samplesBasic material: Sodium sulfate.Recommended application: removal of traces of water from organic solutions.
CHROMAFIX® HR-XC columns
The innovative cation exchanger offers:mixed-mode SPE phase with distinct cation exchange and RP properties excellent enrichment of basic analytesmodern support polymer with optimised pore structure and large specific surfacegood reproducibility, reliable and cost-efficient analysesmore aggressive washing procedures for matrix removal possiblecleaner samples and protection of analytical HPLC and GC instrumentationquantificationof analytes from heavily contaminated sampleslower limits of detection also for critical matrices... the perfect fit for basic analytes in comination with CHROMABOND® HR-X
CHROMAFIX® PS
The innovative cation exchanger offers:mixed-mode SPE phase with distinct cation exchange and RP properties excellent enrichment of basic analytesmodern support polymer with optimised pore structure and large specific surfacegood reproducibility, reliable and cost-efficient analysesmore aggressive washing procedures for matrix removal possiblecleaner samples and protection of analytical HPLC and GC instrumentationquantificationof analytes from heavily contaminated sampleslower limits of detection also for critical matrices... the perfect fit for basic analytes in comination with CHROMABOND® HR-X
Chromatographic columns, DURAN® tubing
Made of DURAN® tubing. Basic chromatographic columns with indentations above the stopcock for placing a cotton plug, with NS socket, with PTFE stopcock and retaining device.
Chromatographic columns, PTFE stopcock, DURAN® tubing
Made of DURAN® tubing. Chromatography columns with sintered frit (porosity 0), NS socket and PTFE stopcock.
Chromatographic columns, PTFE- / or Valve Stopcock, borosilicate glass 3.3
Chromatography columns with socket and with frit. Manufactured from borosilicate glass 3.3 which is resistant to heat and almost all chemicals. NS necks are in compliance with DIN 12242 standards.
Chromatographic columns, valve stopcock, DURAN® tubing
Made of DURAN® tubing. Chromatography columns with sintered frit (porosity 0), NS socket and needle-valve stopcock (bore 0 - 2.5 mm).
Chromatographic columns, with beaded rim and PTFE stopcock, DURAN® tubing
Made of DURAN® tubing. Chromatography columns with sintered frit, porosity 0.
Chromatographic columns, with beaded rim, DURAN® tubing
Made of DURAN® tubing. With PTFE stopcock and retaining device. With indentations above the stopcock for placing a cotton plug.
Cleanroom crimping tools, stainless steel
La-Pha-Pack cleanroom crimping tools are made entirely of stainless steel for maximum durability during dry heat sterilization or autoclaving. The mechanism is corrosion and heat resistant while the stainless steel construction removes the need for any protective coating on the handle or crimp head. Can withstand repeated sterilization for cleanroom use without the risk of damaging the tool. Crimping tools are adjustable in crimping pressure and height to offer optimal crimping results on varying vial styles. Special sizes on request.
Cleanroom decapping tools, stainless steel
La-Pha-Pack cleanroom crimping tools are made entirely of stainless steel for maximum durability during dry heat sterilization or autoclaving. The mechanism is corrosion and heat resistant while the stainless steel construction removes the need for any protective coating on the handle or crimp head. Can withstand repeated sterilization for cleanroom use without the risk of damaging the tool. Crimping tools are adjustable in crimping pressure and height to offer optimal crimping results on varying vial styles. Special sizes on request