James Turner
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Activity overview
Latest activity by James Turner-
James Turner created an article,
What is the difference between Sphereclone ODS1 and ODS2?
Both materials are based on the same silica (porosity, surface area), ODS1 is a low carbon coverage partially endcapped C18, whilst ODS2 has a higher carbon load and is fully endcapped. Due to the ...
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James Turner created an article,
I need to filter my buffered mobile phase prior to use, do you have any suitable products?
We offer an all glass mobile phase filtration system, Filtersys. It comes with a choice of 3 funnel sizes to hold solvent above the filter (there is also an option of a mobile phase pickup adaptor ...
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James Turner created an article,
Is SecurityCap compatible with solvent reservoirs containing THF?
Yes, the body of SecurityCap is manufactured from virgin PTFE which is highly resistant to solvents, nothing should be dissolved out of the cap by THF. Solvents can only contact the cap body, so th...
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James Turner created an article,
How should I select which ferrule material is best for my application?
There are 3 main points to consider: Temperature rating: Graphite ferrules – 450 ⁰C 85/15 vespel/graphite – 350 ⁰C 60/40 vespel/graphite – 400 ⁰C Permability to oxygen. Graphite ferrules are ea...
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James Turner created an article,
Why are vespel/graphite ferrules available preconditioned?
Vespel/graphite ferrules will shrink slightly when they have been exposed to a number of heating cycles. This shrinkage can allow connections that have previously been tested as leak free to start ...
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James Turner created an article,
What is the role of arginine as a mobile phase additive in GFC separations?
Arginine can perform multiple functions within a GFC separation of proteins: Tt can reduce secondary interactions by capping silanol groups, and hence reduce the tailing of basic proteins. It will...
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James Turner created an article,
Why have glass wool in your GC inlet liner?
Glass wool in the injection port liner will provide several benefits: The capture of non-volatile materials present in the sample. Wiping of the needle when an injection is made, this helps ensure...
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James Turner created an article,
What is the function of the “O ring” associated with the liner in the GC inlet?
The O ring forms a seal between the glass inlet liner and the wall of the GC inlet, effectively sealing the bottom half of the injection port from the top half. This seal ensures that gas flows dow...
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James Turner created an article,
How does injection port liner deactivation affect peak shape in GC?
If a GC liner has active sites, analytes which contain nitrogen or oxygen atoms can interact strongly with the liner. This will cause the analytes progress into the column to be retarded, distortin...
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James Turner created an article,
What should I consider when choosing between split and splitless injection modes?
Split injections are the simplest to implement and are suitable for most samples. However if analytes are present at trace levels, splitless injection may be considered to increase the transfer of ...