UHV-EL Reference Standards for EDS/WDS

Ultra High Vacuum Compatible
Micro and Macro Analysis
Standard for Surface & X-ray Analysis

• 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 nonconductive 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.

Retainers

Thickness of retainers is 4.7mm • Dimension accuracy is ±0.5mm

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: +1 530-243-3761.

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.

UHV-EL 37 25mm Round	UHV-EL 18 25 x 12mm Rectangular	UHV-EL 15 21 x 12mm Rectangular
UHV-EL 12 17 x 12mm Rectangular	UHV-EL 9 13 x 12mm Square	UHV-EL 6 9 x 12mm Rectangular

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Large Set Screw Vise for Rectangular UHV-EL Retainers

Large Set Screw Vise is compatible with UHV-EL Rectangular Retainers. Largest 25 Retainer (#6069 or #6079) 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. Ø25mm (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.

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Holder For UHV-EL 37 Round Retainer, 25mm Diameter

     

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).

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Round UHV-EL Retainer can be ordered in Standard or Custom Configuration

Standard Configuration for Round Retainer

The Standard Configuration is shown above. A custom configuration requires that details be given regarding the elements chosen and the configuration (a "blank" Custom Round Retainer is shown for ordering - please print out and fill in exactly as needed).

Note: For custom configuration designate reference standard locations and numbers: use the submit form or print out the submit form, 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, preceded by their respective order numbers.

Reference Standards for UHV-EL Retainers

Abbreviations
M	Natural mineral
Opt	Optical crystal
P	Powder or grains: mixed with either Ag or Sn (for S containing materials) and pressed
TF	Thin film on silicon wafer
VD	Vapor deposit (CVD, LPCVD, etc.)
B	Bulk material
C	Crystalline
EM	End member mineral
F	Foil
HP	Hot pressed
Purity	"N" is the # of "9"'s. 5N stands for 99.999% pure, 2N5 is 99.5% pure
"+"	Higher purity
?	No certificate available. Most original containers with marked purity. With EDS analysis we see no additional elements (>0.1%)
*	These standards are very sensitive to humidity and should be kept in vacuum. We suggest using our Vacu-Storr™ Desiccators.

 

Element/Compound		Symbol	Form	Purity
1.	Aluminum	Al	F	4N
2.	Aluminum Fluoride	AlF3	P	2N5
3.	Aluminum Oxide	Al2O3	C	4N ?
4.	Aluminum Nitride	AlN	P	2N+
5.	Antimony	Sb	B	4N8
6.	Barium Fluoride	BaF2	C	2N
7.	Barium Sulfate	BaSO4	P	3N ?
8.	Barium Titanate	BaTi4O9	HP	2N5 ?
9.	Barium Titanate	BaTiO3	P	3N
10.	Beryllium (For Sale in U.S.A. Only)	Be	F	2N
11.	Bismuth (For Sale in U.S.A. Only)	Bi	B	6N ?
12.	Bismuth Oxide (NO EXPORT)	Bi2O3	P	2N5 ?
12A.	Bismuth Telluride (For Sale in U.S.A. Only)	Bi2Te3	B	5N
13.	Boron	B	B	2N5
14.	Boron Carbide	B4C	P	5N ?
15.	Boron Nitride	BN	B	4N
16.	Boron Phosphide	BP	P	3N
17.	Cadmium	Cd	F	4N7
17A.	Cadmium Sulfide	CdS	P	3N
17B.	Cadmium Telluride	CdTe	B	5N
18.	Calcium Carbonate	CaCO3	C	3N ?
19.	Calcium Fluoride	CaF2	C	3N
20.	Carbon (Pyrolytic)	C	CVD	3N ?
21.	Carbon (Diamond), same as #168 (additional cost)	C (cleaved ~1mm)	C	?
22.	Cerium Oxide	CeO2	P	2N1
23.	Cesium Iodide	CsI	O *	2N ?
23A.	Cesium Bromide	CsBr	P *	4N
24.	Chromium	Cr	P	4N6
24A.	Chromium Carbide	Cr3C2	P	2N8
25.	Chromium Nitride	Cr2N	P	2N5
26.	Chromium Oxide	Cr2O3	HP	5N
27.	Cobalt	Co	F	5N
28.	Cobalt Oxide	Co3O4	P	3N
29.	Cobalt Silicide	CoSi2	P	2N
29A.	Cobalt Sulfide	CoS	P	2N5
30.	Copper	Cu	F	4N5
31.	Cupric Oxide	CuO	P	3N
32.	Cuprous Oxide	Cu2O	EM	3N
32A.	Copper Selenide	CuSe	B	2N5
33.	Copper Sulfide	CuS	M	3N
34.	Copper Sulfide	Cu2S	M	2N+?
35.	Dysprosium	Dy	F *	3N
36.	Erbium	Er	F *	3N ?
37.	Europium Oxide	Eu2O3	HP	3N
38.	Gadolinium	Gd	F *	3N ?
39.	Gallium Arsenide	GaAs	C	5N ?
40.	Gallium Nitride	GaN	P	3N
41.	Gallium Phosphide	GaP	P	2N5
42.	Gallium Antimonide	GaSb	P	2N5 ?
42A.	Gallium Selenide	GaSe	P	4N
42B.	Gallium Sulfide	Ga2S3	B	4N
43.	Germanium	Ge	B	2N
44.	Germanium Oxide	GeO	P	2N5
45.	Gold	Au	F	4N
46.	Hafnium	Hf	F	2N5 ?
46A.	Hafnium Boride	HfB2	P	4N7
47.	Hafnium Carbide	HfC	B	6N
47A.	Hafnium Nitride	HfN	P	2N5
47B.	Hafnium Oxide	HfO2	P	3N ?
48.	Holmium	Ho	B	3N
49.	Indium	In	F	4N
50.	Indium Arsenide	InAs	C	?
50A.	Indium Antimonide	InSb	P	3N ?
51.	Indium Phosphide	InP	C	5N ?
52.	Indium Tin Oxide 10% In, Inhomogenous	ITO	P	4N
52A.	Indium Selenide	In2Se3	P	4N
52B.	Indium Sulfide	In2S3	P	3N8
53.	Iridium	Ir	F	3N5
54.	Iron	Fe	P	4N
54A.	Iron Carbide	Fe3C	F	3N
56.	Iron Fluoride	FeF3	P	3N
58.	Iron Oxide	FeO	P	3N ?
59.	Iron Oxide	Fe2O3	P	5N
60.	Iron Oxide	Fe3O4	EM	5N
61.	Iron Phosphide	FeP	EM	3N
62.	Iron Sulfide	FeS2	P	3N ?
63.	Lead	Pb	P	4N8
64.	Lead Oxide	PbO	F	2N8
64A.	Lead Telluride	PbTe	P	5N
65.	Lead Sulfide	PbS	P	Opt ?
66.	Lanthanum Hexaboride	LaB6	P	3N5 ?
66A.	Lanthanum Fluoride	LaF3	P	Opt
67.	Lutetium Fluoride	LuF3	P	3N
68.	Lithium Fluoride	LiF	P	4N
69.	Magnesium	Mg	C *	3N
70.	Magnesium Fluoride	MgF2	F	3N ?
71.	Magnesium Oxide	MgO	C	4N
72.	Manganese	Mn	B	3N
73.	Manganese Sulfide	MnS	B	2N5
74.	Manganese Oxide	MnO2	P	?
75.	Mercury Sulfide	HgS	P	4N5 ?
75A	Mercury Telluride	HgTe	C	5N
76.	Molybdenum	Mo	C	4N
76A.	Molybdenum Boride	MoB	P	2N
77.	Molybdenum Carbide	Mo2C	F	3N5 ?
78.	Molybdenum Silicide	MoSi2	HP	3N
79.	Molybdenum Oxide	MoO3	P	2N5 ?
81.	Osmium	Os	P	4N5
81A.	Neodymium Fluoride	NdF3	F	3N
81C	Neodymium Oxide	Nd2O3	P	2N8
82.	Nickel	Ni	C	4N4
82A.	Nickel Aluminide	NiAl	F	2N5
83.	Nickel Oxide	NiO	F	3N5 ?
84.	Nickel Phosphide	Ni2P	P	3N
85.	Nickel Silicide	NiSi2	P	3N ?
86.	Niobium	Nb	P	3N7
87.	Niobium Carbide	NbC	P	2N5 ?
88.	Niobium Oxide	Nb2O5	HP	3N5 ?
88A.	Niobium Nitride	NbN	P	2N5
89.	Palladium	Pd	P	3N
90.	Platinum	Pt	F	3N
91.	Potassium Bromide	KBr	F	4N ?
92.	Potassium Chloride	KCl	C	3N5 ?
93.	Potassium Iodide	KI	C	3N ?
93A.	Praeseodymium Fluoride	PrF3	C	3N8
94.	Rhenium	Re	HP	3N7
94A.	Rhenium Oxide	ReO	F	3N ?
96.	Rhodium	Rh	W	2N8
97.	Rubidium Chloride	RbCl	F	3N ?
97A.	Rubidium Iodide	RbI	P	2N7
98.	Ruthenium	Ru	P	3N
99.	Samarium	Sm	P	3N
100.	Scandium	Sc	F	2N9
101.	Selenium	Se	C	3N
102.	Silicon	Si	C	5N
103.	Silicon Carbide	SiC	CVD	Opt ?
104.	Silicon Dioxide	SiO2	EM	2N5 ?
105.	1000Å SiO2/Si	SiO2	TF	3N5
106.	Silicon Nitride	Si3N4	HP	2N
107.	468Å Si3N4/Si	Si3N4	TF	2N5
108.	Silver	Ag	F	3N
109.	Silver Chloride	AgCl	C *	5N
109A.	Silver Oxide	Ag2O	P	3N ?
110.	Silver Sulfide	Ag2S	C	?
111.	Sodium Chloride	NaCl	C	2N5
112.	Sodium Fluoride	NaF	C	5N
113.	Strontium Fluoride	SrF2	P	3N
114.	Tantalum	Ta	F	3N5
115.	Tantalum Carbide	TaC	HP	3N ?
116.	Tantalum Nitride	TaN	P	4N8
117.	Tantalum Oxide	Ta2O5	P	1N8 ?
118.	1000Å Ta2O5/Ta	Ta2O5	TF	2N
120.	Tantalum Silicide	TaSi2	P	2N5
121.	Tellurium	Te	B	5N
122.	Terbium	Tb	F	3N
123.	Thallium Chloride	TlCl	P	3N ?
125.	Thulium	Tm	F	2N5
126.	Tin	Sn	F	5N
127.	Tin Oxide	SnO2	EM	2N5
127A.	Tin Sulfide	SnS	P	2N5
127B.	Tin Selenide	SnSe	P	5N
128.	Titanium	Ti	F	2N5
128A.	Titanium Al Carbide	Ti2AlC	P	2N ?
129.	Titanium Carbide	TiC	HP	2N5
130.	Titanium Diboride	TiB2	HP	2N5 ?
131.	Titanium Dioxide	TiO2	EM	2N5
132.	Titanium Nitride	TiN	P	4N5
132A.	Titanium Oxide	TiO	HP	3N
133.	Titanium Silicide	TiSi2	P	3N
134.	Tungsten	W	F	4N
135.	Tungsten Carbide	WC	HP	4N8
137.	Tungsten Oxide	WO3	P	2N+
138.	Tungsten Silicide	WSi2	P	2N5
139.	Tungsten Sulfide	WS2	P	2N8
140.	Vanadium	V	F	2N5
141.	Vanadium Carbide	VC	HP	4N ?
141A.	Vanadium Nitride	VN	HP	2N5 ?
142.	Vanadium Oxide	V2O5	P	4N ?
142A.	Ytterbium	Yb	F	3N
142B.	Ytterbium Oxide	YB2O3	P	3N
143.	Yttrium	Y	F *	3N
143A.	Yag	YAlO	C	?
144.	Yttrium Oxide	Y2O3	P	4N
145.	Zinc	Zn	F	3N8
146.	Zinc Oxide	ZnO	HP	3N
147.	Zinc Selenide	ZnSe	C	?
148.	Zinc Sulfide	ZnS	C	?
149.	Zirconium	Zr	F	3N5
150.	Zirconium Carbide	ZrC	HP	?
150A.	Zirconium Nitride	ZrN	P	2N5
151.	Zirconium Oxide (Mineral)	ZrO2	C	2N7 ?

 

	Mineral	Formula (approximate)
152.	Acanthite	Ag2S
153.	Albite	NaAlSi3O8
154.	Almandine	Fe32+Al2(SiO4)3
155.	Andradite	Ca3Fe23+(SiO4)3
156.	Anorthite	CaAl2Si2O8
156A.	Augite	(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6
157.	Baddeleyite	ZRO2 (traces of Ti and Fe)
157A.	Barite	BaSO4
158.	Benitoite	BaTiSi3O9
159.	Biotite (black mica)	K(Mg,Fe2+)3(Al,Fe3+)Si3O10(OH,F)2
160.	Bytownite	(Na, Ca)Al(Al,Si)Si2O8
161.	Calcium Carbonate	CaCO3
162.	Cassiterite	SnO2
163.	Chalcocite	Cu2S
164.	Cinnabar	HgS
165.	Chrysoberyl	BeAl2O4
166.	Covellite	CuS
167.	Cuprite	Cu2O
168.	Diamond, same as #21 (additional cost)	C (cleaved ~1mm)
169A.	Diopside	CaMgSi2O6
170.	Dolomite	CaMg(CO3)2
170A.	Fayalite	Fe22+SiO4
171.	Fluorapatite	Ca5(PO4)3F
172.	Forsterite	Mg2SiO4
173.	Hematite	Fe2O3
174.	Hornblende (Amphibole)	Ca2(Mg,Fe2+)4Al(Si7Al)O22(OH,F)2
175.	Kyanite	Al2O3.SiO2
176.	Magnetite	Fe3O4
177.	Orthoclase	K2O.Al2O3.6SiO2
177A.	Pyrope	Mg3Al2(SiO4)3
178.	Quartz	SiO2
179.	Rutile	TiO2
180.	Sodalite	Na4(AlCl)Al2(SiO4)3
180A.	Spessartine	Mn2+3Al2(SiO4)3
181.	Spinel	MgAl2O4
181B.	Titanite	CaTiSiO5
182.	Willemite (Troosite)	Zn2SiO4
183.	Wollastonite	CaSiO3

Note: electron probe compositions provided upon request or with standard. Some mineral standards have minor phases of other materials.

SRM# National Institute of Standards & Technology (formerly NBS) Please see note below regarding alloys.
Glasses		B2O3	Na2O	MgO	Al2O3	SiO2	Cl	K2O	CaO	TiO2	V2O5	Cr2O3	MnO2	Fe2O3	ZrO2	PbO	Bi2O3	BaO	ZnO	CoO	CuO
184.	612		14.0		2.0	72.0			12.0		+50 ppm of 51 other elements
185.	93a	12.5	3.9		2.2	80.8	.06	.01	.01	.01				.028	.04
186.	K252					40.0							5.0					35.0	10.0	5.0	5.0
187.	K229					30.0										70.0
188.	K326	30.0	2.0	30.1		29.9			8.0
189.	K309				15.0	40.0			15.0					15.0				15.0

 

Ti Alloys		Fe	C	Mn	P	S	Si	Cu	Zn	Pb	Sn	Ni	Cr	V	Mo	Ti	As	W	Zr	Nb	Ta	Al	Co
190.	654b	.23					.045	.004			.023	.028	.025	4.31	.013	88.05			.008			6.34
191.	1128	.134	.011								3.04		2.96	15.13		75.64						3.06

Miscellaneous NIST Standards

192.	1104	.088			.005			61.33	35.31	2.77	.43	.07
193.	1108	.044		.0025				64.9	34.4	0.06	.39	.033
194.	1110	.033						84.5	15.2	0.03	.051	.053
195.	1230	Bal	.044	.64	.023	.0007	.43	.14				2.42	14.8	.23	1.18	2.12						.24	.15
195A.	1243	.79	.024	.019	.003	.0018	.018	.007				58.78	19.20	.12	4.25	3.06			.053			1.23	12.46
195B.	1297	Bal	.066	7.11	.038	.0033	.397	.442				5.34	16.69	.08	.33								.13
196.	C2402	7.3	.01	.64	.007	.018	.85	.19				51.5	16.15	.22	17.1			4.29					1.5

 

196A.	2321	Solder : Sn 60% / Pb 40%
197.	SRM-482 5 wires in one 3mm ø mount. Cu:Au (20:80, 40:60, 60:40, 80:20) + pure Cu (additional cost)
197A.	SRM-481 6 wires in one 3mm ø mount. Ag:Au (pure Ag, pure Au, 20:80, 40:60, 60:40, 80:20) (additional cost)
197B.	871 Phosphor Bronze (CDA-521) (additional cost)

 

Steels		Fe	C	Mn	P	S	Si	Cu	Zn	Pb	Sn	Ni	Cr	V	Mo	Ti	As	W	Zr	Nb	Ta	Al	Co
198.	461	Bal	.15	.36	.053	.019	.047	.34		.003	.022	1.73	.13	.024	.3	.01	.028	.01	<.005	.011	.002	.005	.26
199.	462	Bal	.40	.94	.045	.019	.28	.20		.006	.066	.70	.74	.058	.08	.037	.046	.053	.063	.096	.036	.02	.10
200.	464	Bal	.54	1.32	.017	.021	.48	.094		.02	.043	.13	.078	.29	.029	.004	.018	.022	.01	.037	.069	.005	.02
201.	465	Bal	.037	.032	.008	.01	.029	.019		<.0005	.001	.026	.004	.002	.005	.20	.01	.001	.002	.001	.001	.19	.08
202.	466	Bal	.065	.11	.012	.009	.025	.033		.001	.005	.051	.011	.007	.011	.057	.014	.006	<.005	.005	.002	.01	.04
203.	467	Bal	.11	.23	.003	.009	.26	.067		.000	.1	.088	.036	.041	.021	.26	.14	.20	.094	.29	.23	.16	.07
204.	468	Bal	.26	.47	.023	.02	.075	.26		<.0005	.009	1.03	.54	.17	.20	.011	.008	.077	<.005	.006	.005	.04	.16
205.	661	Bal	.39	.66	.015	.015	.223	.042			.01	1.99	.69	.011	.19	.02	.017	.01	.009	.22	.02	.02	.03
206.	663	Bal	.57	1.50	.02	.005	.74	.09		.0022		.32	1.31	.31	.30	.05	.01	.04	.05	.049		.24	.05
207.	664	Bal	.87	.25	.01	.025	.066	.25		.024		.14	.06	.10	.49	.23	.05	.10	.069	.15	.11		.15
208.	665	Bal	.008	.0057	.002	.0059	.008	.0058				.041	.007	.0006	.005	.0006	.002						.01
209.	1761	Bal	1.03	.68	.043	.033	.19
210.	1762	Bal	.034	2.03	.036	.03	.36
211.	1763	Bal	.20	1.59	.012	.022	.65
212.	1764	Bal	.59	1.22	.023	.012	.06
213.	1765	Bal	.006	.14	.007	.004	.005
214.	1766	Bal	.015	.06	.004	.002	.01
215.	1767	Bal	.051	.02	.005	.009	.02
216.	1768	Bal	.001	.014	.0013	.0003		.0006				.0014										.002	.002

 

Alloys- Certified by a group of laboratories, NIST traceable. Analysis provided with each alloy purchased. Nominal Compositions

Stainless Steels + High Temp Nominal Compositions		Low Alloy + Specialty Alloys Nominal Compositions		Nickel/Cobalt Nominal Compositions		Copper/Brass/Bronze Nominal Compositions
216B.	AISI 302	233.	C-4140	242.	Inco 600	249.	CDA 360
217.	AISI 303	234.	C-4340	243.	Inco 625	250.	CDA 510
218.	AISI 304	235.	C-8620	244.	Inco 718	251.	CDA 655
219.	AISI 316	236.	Tool Steel A-6	245.	Inco 800	252.	CDA 857
220.	AISI 321	237.	Tool Steel D-2	246.	Hastelloy C-22
221.	AISI 410	238.	Tool Steel H-13	247.	Hastelloy C-276
222.	AISI 440C	239.	Tool Steel M-2	248.	Hastelloy X
223.	PH13-8MO	240.	2Cr-1Mo (36a)
224.	15-5 PH	241.	9Cr-1Mo (38a)
225.	17-4PH	241A.	50 NIL
226.	CARP 20CB3	241B.	52100
227.	Maraging 300	241C.	AISI 4820
228.	HK-40	241D.	AISI 9310

 

Miscellaneous Standards:
229.	BPSG (not an NIST standard), 4% P, 3.3% B.
230.	Al-Cu: NIST traceable standard for energy dispersive x-ray detector calibration (additional cost).
231.	C-Cu-Ag: Standard for electron backscattering adjustment. Used for gun shot residue calibration
232.	GSR- Gun shot residue: mixture of Ba, Sb, Pb particles in epoxy and carbon coated.
Faraday Cup, for beam current measurement, is available for all of the retainers and will take one of the spaces.

 

PLEASE READ CAREFULLY!
The metal alloys on this list cannot be assumed to be homogenous at the micrometer scale. If you intend to use ZAF corrections electron beam excited x-ray analysis (wavelength or energy dispersive), the sample volume must be homogenous within the electron excited volume. It is a misuse to use these metal alloys for bulk quantitative analyses. Nevertheless, they are useful for comparison purposes (in a least square sense) to compare against unknown materials. Every effort is made to insure that cutting, grinding, and polishing of the materials do not alter their composition.