CMT Standard Reference Materials (NIST SRMs) Group

	Element	%		Oxide	%		srm-612-1		srm-612-2
	O	46.48±0.13					Prisms 1.5mm x 1.5mm x 3mm. Composition = U. Toronto EPMA. National Bureau of Standards		Polished SRM612 in T100-52 mount		NIST silicate glass SRM 612 is widely used as a reference material for various microanalytical techniques, and has been nominally doped with 61 trace elements at the 50 ppm level. A discussion of this SRM, and other glasses of this series, can be found in Hinton (1999).
	Na	10.52±0.07		Na2O	14.18±0.10
	Mg	0.00		MgO	0.00
	Al	1.06±0.02		Al2O3	2.01±0.04
	Si	33.79±0.10		SiO2	72.29±0.22
	Cl	0.02±0.02		Cl	0.02±0.02
	K	0.01±0.01		K2O	0.01±0.01
	Ca	8.41±0.08		CaO	11.77±0.11
	Ti	0.01±0.01		TiO2	0.02±0.02
	Mn	0.01±0.02		MnO	0.01±0.02
	Fe	0.01±0.02		FeO	0.01±0.02
	Sum	100.3±0.2		Sum	100.3±0.3

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Name	Description	SPI #	Each
SRM-612 50ppm Trace Element Glass	SPI Supplies® Individual Mounted Microanalysis Standard Item	AS9200-AB	$199.56
SRM-612 50ppm Trace Element Glass	SPI Supplies® Individual Loose Microanalysis Standard Item	AS9205-AB	$199.56