Products
UHV-EL Reference Standards
UHV-EL Reference Standards for EDS/WDS
- UHV (ultrahigh vacuum) compatible (10-10 torr)
- Suitable for spectral and intensity references for EDS, WDS, EPMA, Auger, XPS, ESCA, etc.
- Custom and standard reference material configurations
- Rectangular or circular retainers holding from 6 to 37 reference standards
- Retainers machined from SS304
- Custom mounting bases available
- Each reference standard is individually and separately prepared from bulk or powdered materials, polished with the most suitable method, and can easily be removed or reinserted into the retainer
Analysis accuracies of 1-2% (relative) are possible only when appropriate standards are used. UHV systems cannot accept commonly available standard sets because of outgassing of mount materials and degradation from electron beam heating.
The use of bakelite, plastic or epoxy embedded standards under UHV conditions have prevented accurate analysis. These inaccuracies are caused by compromised vacuum levels and contaminated reference standards.
Also, standardless techniques give no indication that some elements may not be accounted for or are present in an oxide phase.
Reference standards supplied with the UHV-EL, which contain only UHV compatible materials, can be used to characterize the transmission of the electron energy analyzer, determine peak shapes, resolution, energies and sensitivity factors.
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.
Construction and Design
The retainer is precision machined from stainless steel 304. Each retainer has holes machined with a 0.13mm boss at the top.
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 back of the mount. The round UHV-EL-37 is laser engraved to assist in locating the desired reference standard using electron
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; all minerals and glasses are coated with ~20nm of carbon.
The silver can be used for reference when determining sensitivity factors.
Custom Preparation
Your materials may be inserted into one of the retainers described using careful techniques.
Electron beam X-ray techniques and reference standards – which are charge sensitive – can be carbon coated. All conductive minerals and glasses are coated with ~20nm of carbon.
Shipping
UHV-EL-37 circular retainer reference standards are shipped in a VACU-STORR container. It is optional for other configurations or custom orders.
Certification
The purity or composition of each reference standard is certified by the manufacturer. The SRM classes and certified alloys are NIST traceable, please see information on Reference Standards and Alloys below.
To order, select Retainer Style and reference standard locations and numbers: use the submit form. Click on part number for retainer style to open element location form.
Alternatively, print the submit form, fill in the corresponding numbers for 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.
Please note: products containing Bi are only available for sale in the U.S.A.
All minerals and glasses are coated with ~20nm of carbon. If you want uncoated standards, please put this on your order.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 6065 | UHV-EL 6 Rectangular Retainer, 9 x 12mm, 6 spaces |
Each | € 358,60 | ||
| 6066 | UHV-EL 9 Square Retainer, 13 x 12mm, 9 spaces |
Each | € 412,50 | ||
| 6067 | UHV-EL 12 Rectangular Retainer, 17 x 12mm, 12 spaces |
Each | € 496,60 | ||
| 6068 | UHV-EL 15 Rectangular Retainer, 21 x 12mm, 15 spaces |
Each | € 580,60 | ||
| 6069 | UHV-EL 18 Rectangular Retainer, 25 x 12mm, 18 spaces |
Each | € 672,30 | ||
| 6070 | UHV-EL 37 Round Retainer, 25mm diameter, 37 spaces |
Each | € 849,20 |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 6060 | UHV-EL – Any Single Reference Standard other than Diamond, Cu/Au, Ag/Au or Al/Cu (specify number from list) |
Each | € 285,20 | ||
| 6061 | Diamond UHV-EL Single Reference Standard, (No. 21 and No. 168 on list) |
Each | € 580,60 | ||
| 6062 | Cu/Au UHV-EL Single Reference Standard, SRM482, 5 wires (No. 197 on list) |
Each | € 580,60 | ||
| 6063 | Al/Cu UHV-EL Single Reference Standard (No. 230 on list) |
Each | € 443,10 | ||
| 6091 | Ag/Au UHV-EL Single Reference Standard, SRM481, 6 wires (No. 197A on list) |
Each | € 580,60 | ||
| 6092 | Phosphor Bronze UHV-EL Single Reference Standard, (No. 197B on list) |
Each | € 285,20 | ||
| 6064 | Faraday Cup for UHV-EL to measure beam current |
Each | € 285,20 |
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 6075 | UHV-EL 6 Rectangular Retainer, 9 x 12mm, with 6 reference standards (select from list) |
Each | € 1.018,50 | ||
| 6076 | UHV-EL 9 Square Retainer, 13 x 12mm, with 9 reference standards (select from list) |
Each | € 1.482,00 | ||
| 6077 | UHV-EL 12 Rectangular Retainer, 17 x 12mm, with 12 reference standards (select from list) |
Each | € 1.935,20 | ||
| 6078 | UHV-EL 15 Rectangular Retainer, 21 x 12mm, with 15 reference standards (select from list) |
Each | € 2.587,00 | ||
| 6079 | UHV-EL 18 Rectangular Retainer, 25 x 12mm, with 18 reference standards (select from list) |
Each | € 2.836,60 | ||
| 6080 | UHV-EL 37 Round Retainer, 25mm diameter, with 37 reference standards (select from list) |
Each | € 7.575,10 | ||
| 6081 | UHV-EL 37 Round Retainer, 25mm diameter, Standard Configuration with 37 reference standards |
Each | € 7.575,10 |
Large Set Screw Vise is compatible with UHV-EL Rectangular Retainers. Largest 25 Retainer (#6069 or #6080) will go over edge of holder slightly. Bottom image shown with UHV-EL 12 Retainer (not included).
Set Screw Vise with an open slot of 13.2mm (0.520″) wide x 3.9mm (0.155″) deep. 25mm (1″) x 17.5mm (0.69″) high.
Made of machined aluminum with stainless steel set screws.
Two sizes of set-screws included, M3 x 6mm and M3 x 8mm.
Holder has a 9.5mm long 3.2mm (1/8″) diameter pin.
Allen wrench included.
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 15474 | Wider Version Large Set Screw Vise, 25mm, 9.5mm long pin |
Each | € 55,70 |
Specimen holder for 1″ and 25mm metallographic mounts and other cylindrical 1″ diameter samples.
Holder height is 0.33″ (8.4mm, not including pin) with a recessed area 0.15″ (3.8mm) deep.
Pin is short 6mm length with standard 3.2mm (1/8″) diameter.
Pin is removable, base is M4 threaded.
Open sides for easier sample removal. Made of machined aluminum with two stainless steel Allen screws (M3 x 6mm and M3 x 12mm) and Allen wrench included.
Shown with UHV-EL 37 Retainer (not included).
| Art. | Description | Unit | Price | Quantity | |
|---|---|---|---|---|---|
| 15603-9 | Holder For UHV-EL 37 Round Retainer, 1″ and 25mm, short 6mm pin |
Each | € 77,50 |
