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UHV-EL Reference Standards
for EDS/WDS
Ultra High Vacuum Compatible
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Since generalized sensitivity factors cannot be used with a reasonable degree of accuracy, even for the same instrument model, it is necessary for these factors to be determined for each unique instrument, on a continuing basis. Conditions will change over time because of peak shift, amplifier settings and spectrometer tolerances. DesignThe retainer is precision machined by numerically controlled tools from stainless steel 304. The round UHV-EL-37 is laser engraved to assist in locating the desired reference standard using electron or optical imaging. All reference standards are precisely referenced within 0.13mm of the top surface. This recess protects the reference standard surfaces from contamination and scratching and also minimizes the possibility of X-ray fluorescence from the retainer. The reference standards, which are of various thicknesses, are retained by SS304 clips which are inserted from the bottom of the mount. Reference standards are individually sized and polished according to the properties of the material. Cross contamination and smearing is avoided. If a reference standard surface gets roughened from excessive ion beam sputtering or is too highly oxidized, it can be easily removed and replaced in your laboratory. Tools and clips are provided. If bulk materials are not available for some reference standards, powders are used. They are consolidated with silver flake and the powder grains metallographically polished. Many insulators prepared this way are sufficiently conductive for X-ray and Auger analysis without carbon coating. The silver can be used for reference when determining sensitivity factors. Custom PreparationYour materials may be inserted into one of the retainers described using careful techniques. For electron beam X-ray techniques, reference standards, which are charge sensitive, can be carbon coated. Shipping |
RetainersFor Configuration, designate Retainer Style and reference standard locations and numbers:Use the submit form or print out the PDF form and fill in the numbers in the actual spaces for the desired elements/compounds and fax it to us at: 530-243-3761. See below for a list of elements and compounds and their respective order numbers. |
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