SPE

Special phase for SPE analysis of PCB from sludge

Special combination phase:
N: sodium sulphate for removal of trace water.
A: SiOH/AgNO₃ phase for removal of sulphur, sulphur-containing and polar compounds.

Recommended application: extraction of PCB from sludge.

Diol modified silica phase for SPE

Base material silica, pore size 60Å, particle size 45µm, specific surface 500m²/g, pH stability 2 to 8, diol phase, carbon content 5.5%, polar properties similar to SiOH.

Recommended application: antibiotics, prostaglandins.

Polyamide 6 for SPE

Matrix polyamide 6, unmodified, high purity, particle size 40 to 80µm.

Recommended application: flavonoids, PAH.

The innovative cation exchanger offers:

mixed-mode SPE phase with distinct cation exchange and RP properties excellent enrichment of basic analytes
modern support polymer with optimised pore structure and large specific surface
good reproducibility, reliable and cost-efficient analyses
more aggressive washing procedures for matrix removal possible
cleaner samples and protection of analytical HPLC and GC instrumentation
quantificationof analytes from heavily contaminated samples
lower limits of detection also for critical matrices

... the perfect fit for basic analytes in comination with CHROMABOND^® HR-X
SPE phases for polymer-based RP and ion chromatography

Base material: high-purity polystyrene-divinylbenzene copolymers (PS/DVB)
pore size 100 Å, paricle size 100µm. Verly low degree of swelling, thus very well suited for chromatography. Different modifications for different applications from elimination of nonpolar compounds up to removal of specific polar comonents.

Recommended application:
Removal of interfering compounds

• improves chromatographic separtions, if the interfering components overlap with the analyte in the chromatogram
• improves lifetime of the chromatographic column, since interfering components can irreversibly block the column packing

Propylsulphonic acid modified silica cation exchanger for SPE

Base material silica, pore size 60Å, particle size 45µm, specific surface 500m²/g, pH stability 2 to 8, propylsulphonic acid modified silica, very strong cation exchanger (capacity ~ 0.7meq/g), contrary to the SA phase no P-P interactions.

Recommended applications: weak cations.

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.

Combination phase for SPE analysis of PCB

Special 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).

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.

Combination phase for SPE analysis of PCBs

H₂SO₄: 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.

Kieselguhr phase for liquid-liquid extraction

Base 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.

Empty CHROMABOND^® column (PP) for SPE, one PE-filter element is already inserted in the column.

96-well polypropylene plates for simultaneous filtration of 96 samples
Advantages of this high-throughput system are:

• economical by saving time and solvent
• use of multi-channel pipettors facilitates liquid transfer steps
• readily adaptable to all common automated/robotic handling systems
• minimised dead volume (≤ 40µl)
• membrane materials correspond to the respective CHROMAFIL^® syringe filters

50 bags of 14.5g (for max. 20ml aqueous solution each).

QuEChERS method and pre-mixes
Within 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 samples
10 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.
Special silica phase for determination of pesticides in food samples with primary and secondary amine functions (PSA).
Particle size 45 µm, specific surface 500 m²/g, pH-stability from pH 2 to 8.

The innovative cation exchanger offers:

mixed-mode SPE phase with distinct cation exchange and RP properties excellent enrichment of basic analytes
modern support polymer with optimised pore structure and large specific surface
good reproducibility, reliable and cost-efficient analyses
more aggressive washing procedures for matrix removal possible
cleaner samples and protection of analytical HPLC and GC instrumentation
quantificationof analytes from heavily contaminated samples
lower limits of detection also for critical matrices

... the perfect fit for basic analytes in comination with CHROMABOND^® HR-X

Aluminium oxide, neutral, pH 7 ±0,5

Octadecyl modified silica phase for SPE, not endcapped

Base 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.

Octadecyl-modified silica gel phase for SPE, endcapped
Base 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.

Special phase for drying organic samples
Basic material: Sodium sulfate.
Recommended application: removal of traces of water from organic solutions.

The innovative cation exchanger offers:

mixed-mode SPE phase with distinct cation exchange and RP properties excellent enrichment of basic analytes
modern support polymer with optimised pore structure and large specific surface
good reproducibility, reliable and cost-efficient analyses
more aggressive washing procedures for matrix removal possible
cleaner samples and protection of analytical HPLC and GC instrumentation
quantificationof analytes from heavily contaminated samples
lower limits of detection also for critical matrices

... the perfect fit for basic analytes in comination with CHROMABOND^® HR-X