Chromatography Blog

Chromatography

To do: The first attempts with CHROMABOND® HR-XAW show that enrichment by ionic interaction works much better for Acesulfame than for cyclamate, than the hydrophobic interaction using CHROMABOND® HR-X. The results of these experiments will be summarized in an application note and will be published soon. Subsequent analysis with HPLC-MS/MS

Read More
Chromatography

Figure 3: Influence of the particle size Conditions: SPE Column type: CHROMABOND® HR-X polypropylene columns 45 µm or 85 µm, 3 mL, 60 mg; Sample pretreatment: addition of 0.25 mL 1 mol/L KH2PO4 buffer pH 2.5 to 10 mL water sample solution; Conditioning: 3 mL methanol, 3 mL KH2PO4 buffer (25 mmol/L pH

Read More
Chromatography

Determination of residues of sweeteners in fresh water In water analysis the investigation of residues of sweeteners has gained more importance in the last few years. With the increased consumption of reduced calorie products, many sweeteners are widely distributed in the environment unchanged (without degradation).  This is also true for

Read More
Chromatography

  Filtration of polar samples A polar aqueous sample requires a hydrophilic membrane.  The hydrophilic membrane of the cellulose mixed esters (MV) syringe filter has very low adsorption of dissolved substances and is suitable for such sample. If the sample additionally contains water-soluble oligomers and polymers (especially biological macromolecules) a

Read More
Chromatography

Always the right syringe filter For the preparation of complex samples including after successful derivatization of the analytes, a rapid filtration is required.  This is necessary to protect the instrument from damage by particulates.  Most analysts simply use the first syringe filter they find in the lab.  However, often that

Read More
SHARE

Home Page Chromatography Blog