Posts tagged 'sample preparation'

What syringe filter is the best for my application?
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What syringe filter is the best for my application?

There is a huge selection of syringe filters available in all kinds of material, pore sizes and diameters.  When it comes to selecting the most appropriate one for your application this can make it seem like a bit of a minefield. We break the process down into a number of steps to help simplify selection. 1. Match pore size with your application Most types of syringe filters come in a selec...
Filter Papers
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Am I using the right filter material and size for my filtration?

Selecting the right filter for your lab filtration will help to ensure you get the desired results. After considering whether you need vacuum or gravity filtration, you then need to select a suitable filter material and size. [caption id="attachment_9504" align="aligncenter" width="300"] With so many types and sizes of filter paper available, make sure you choose the right one for the tas...
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The new SA6 Vortex Mixer by Stuart

Stuart have launched a new vortex mixer, the mini SA6 model with a robust casing and variable speed control, this mini unit is ideal for chemical and bioscience laboratories alike.   Vortex mixers are widely used in bioscience laboratories, and are particularly useful for life science researchers studying cell cultures and microbiology. Chemical labs also rely on vortex mixers everyday...
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How can I stop my syringe filters getting blocked up?

Syringe filtration is a great, quick method of filtering samples prior to further analysis by HPLC, UV-VIS analysis or other analytical techniques. Some samples which have a high amount of solid particulates in them can block up syringe filters, slowing down the process. GE Whatman have designed two specialist syringe filter ranges with a clever filter structure which aims to combat this,...
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Sample preparation for Moisture Balances

Moisture balances require the user to understand how to test their particular material, having an idea of the results expected and knowing how to prepare the sample correctly. Depending on your material, not only can water be evaporated but it may be oils, alcohols etc. that are also altered by heat. Moisture balances work by drying samples using heat from halogen lamps mounted above the...

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How can I cut down HPLC sample preparation time?

The preparation of samples prior to HPLC or UHPLC analysis can be very time consuming, particularly in laboratories which analyse a high volume of samples. Filter manufacturers Whatman have developed a range of unique devices which can cut sample prep time by 1/3, and could even save money too - the UniPrep Vials [caption id="attachment_9638" align="aligncenter" width="300"] The UniPrep V...
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Which homogeniser should I choose?

With a wide range of homogenisers available, from ultrasonic units, to mechanical models with rotor stator blades, through to bead ruptors, how do you select the model suitable for your samples? [caption id="attachment_8485" align="aligncenter" width="300"] Ultrasonic? Rotor Stator? Bead mill? Which homogeniser is best?[/caption] There is no one type which is "best" - it all depends on wh...

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