General & Chromatography Consumables

MACHEREY-NAGEL filter papers

Filtration

Qualitative filter paper is the standard paper suitable for most applications. It is used in general laboratory filtration, e.g. for the determination of dry matter or the clarification of liquids. Qualitative filter papers are available as circles and as pre-folded filters.

Quantitative filter paper, also called ashless filter paper, is acid-washed and has an extremely low ash content (< 0.01 %). It is used for ignition residue testing and for contamination-free filtration.

Both qualitative and quantitative filter papers are also available in hardened versions. These papers are wet-strengthened and therefore exhibit high mechanical stability when wet. They are particularly suited to applications where the residue is removed from the filter with a spatula, and are often used for quantitative routine procedures and gravimetric analysis.

GC columns, reagents and accessories

Chromatography Consumables

GC columns

MACHEREY-NAGEL produces more than 50 GC phases, most of them USP listed. Each column is individually tested and supplied with a test certificate (including test chromatogram) and instruction leaflet, but without fittings or ferrules. Column ends are fused or sealed with septa to protect them from atmospheric oxygen. The standard GC cage size is 7 inches. In addition to the standard range, custom-made columns are often available – in other dimensions, with an integrated guard column, or on a 5-inch (~13 cm) cage, e.g. for the Agilent GC 6850.

Derivatization reagents

Besides GC columns, high-quality derivatization reagents for gas chromatography are also available.

Accessories for gas chromatography

In addition to GC columns and derivatization reagents, the range includes GC pre-columns (guard columns) and retention gaps, ferrules, capillary connectors and septa, as well as general accessories and tools.

MACHEREY-NAGEL QuEChERS mixes

Chromatography Consumables

QuEChERS mixes

Within a few years of its development by Anastassiades et al., the QuEChERS method has gained a leading position in the determination of pesticide residues in food samples by GC-MS or LC-MS, allowing rapid and inexpensive clean-up of heavily matrix-contaminated samples.

Advantages of QuEChERS compared with classical clean-up methods

• High throughput thanks to easy handling and a time-saving procedure
• Low solvent consumption
• No need for chlorinated solvents
• Suitable for a wide variety of pesticides
• Robust method with high and reliable recovery rates
• Broad applicability to many types of food

To optimise the extraction of pH-dependent compounds, minimise the decomposition of sensitive substances and broaden the range of matrices, several modifications of the QuEChERS method have been developed. The mixes differ in the type of buffering agent used, and therefore in the resulting pH of the aqueous sample during extraction.

Omnilab – laboratory supplies

General Consumables and Equipment

Omnilab is a specialised distributor supplying customers in industry and research with laboratory supplies such as laboratory equipment, consumables and chemicals. Your individual requirements are our top priority, which is why we have specialised in services such as e-procurement, laboratory planning and maintenance. With integrated solutions, we help you organise everyday laboratory work and optimise processes along the supply chain.

neoLab – laboratory supplies

General Consumables and Equipment

We constantly work to supply our existing customers with products that meet their needs and to provide the right services, and we look forward to convincing new customers of the quality of our products. Thanks to close contact with our customers and a constantly growing product range, we are proud to have such a high level of regular customers – a confirmation of our efforts. Our customers work in 141 business sectors, which reflects the diversity of the neoLab product range. As a result, we are confident that we can provide you with valuable support as well.