AN ANALYTICAL XRAY SERVICES LABORATORY
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You can never have enough sample holders no matter what machine you’re running. We’ve certainly found this to be true at Texray so we always try to keep a large number of them on-hand. KS Analytical Systems has always made one-off and custom sample holders for the Bruker instruments, but we’re now offering the standard PMMA powder holders as well at significant cost savings over the OEM version. The standard holder (25mm x 1mm deep well) is priced at $55 with bulk discounts starting at 20 holders.

Custom well depths, diameters, grooved floors, side-loading and zero-background versions are available.

Our PMMA holders are compatible with Bruker D8 Focus – D8 Advance (single, FlipStick autosampler, 90-position autosampler), D4 Endeavor and D2 Phaser (single only) systems. D500 and D5000 instruments can also use these holders.

We’ve brought the complete manufacturing process in-house to give us the freedom to make the custom designs our customer have always asked for. This includes custom laser etching. Company logos are a common request, but we’ve also started serializing sample holders on request. At Texray, we even etch them with barcodes for tracking samples through the data collection process.

The pictures below show a custom funnel tool for filling side-loading sample holders. The tool is machined from billet aluminum with an acrylic window on the funnel to make it easier to gauge fill level. The funnel itself is polished and the viewing plate which allows the users to see when the sample well is full is made of sapphire crystal for maximum scratch resistance.

Posted by: In: Uncategorized 03 Jan 2018 0 comments Tags: , , , ,

Most of the zero-background sample holders we make are designed with permanently affixed plates. We prefer this dramatically as loose plate are constantly getting dropped, chipped, or lost. However, a permanently affixed plate also gives us the freedom to precisely (within about 0.02mm) set the depth of the plate below the plane of diffraction. This can make a big difference in the results depending upon the volume of powder loaded as the standard “flush mount” puts the plate exactly in the plane of diffraction. This works fine for very small volumes, but it does guaranty the there will be a displacement error of some magnitude regardless of the particle size or volume. For this reason, we always offer custom recessing as an option. The only drawback to the permanently affixed style of mounting is that the offset (or flush mounting height) cannot be changed. Our preferred solution is to simply create a set of holders with various depths to accommodate different sample thicknesses, but we had a request recently for an infinitely variable mounting solution.

Complicating the project is that the holder was to be used in a D2 Phaser with a 6 position autosampler which does not use the same style of base holder as the single-sample variant or any other Bruker XRD that we’re aware of. We discussed several options. The large number of heights needed made multiple holders, spacers, and any other solution that relied on discreet steps unacceptable. The thin-walled sample bases and relatively tight dimensions made a screw-in insert unrealistic as well. The final solution was to build a custom tool for setting the ZBH at a specific depth. This requires the user to work with bare Si plates, but it meets all the design criteria and we’re hopeful that this will work well for them.

The tool is made from acetal (Delrin) plastic which is extremely resistant to chemicals, adhesion, and abrasion. It’s actually an ideal material for threaded parts and machines very well.