CMT Standard Reference Materials (NIST SRMs) Group

	Element	%		Oxide	%		srm-610-1		srm-610-2
	O	45.040±0.120					1.6mm (approx) cubes plus uncut discs. Composition = U. Toronto EPMA. National Bureau of Standards		Polished SRM610 in T100-52 mount		NIST silicate glass SRM 610 is widely used as a certified reference material for various microanalytical techniques, and has been nominally doped with 61 trace elements at the 500 ppm level. However, certified concentration data exist for only a few of these elements. A discussion of this SRM, and the other glasses of this series, can be found in Hinton (1999).
	Na	10.262±0.067		Na2O	13.833±0.090
	Mg	0.040±0.007		MgO	0.067±0.012
	Al	1.025±0.014		Al2O3	1.936±0.027
	Si	32.671±0.100		SiO2	69.895±0.214
	Cl	0.047±0.016		Cl	0.047±0.016
	K	0.051±0.016		K2O	0.061±0.019
	Ca	8.126±0.059		CaO	11.370±0.083
	Ti	0.042±0.015		TiO2	0.070±0.025
	Mn	0.041±0.019		MnO	0.053±0.025
	Fe	0.046±0.018		FeO	0.059±0.023
	Sum	97.4±0.2		Sum	97.4±0.3

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Name	Description	SPI #	Each
SRM-610 500ppm Trace Element Glass	SPI Supplies® Individual Mounted Microanalysis Standard Item	AS9190-AB	$199.56
SRM-610 500ppm Trace Element Glass	SPI Supplies® Individual Loose Microanalysis Standard Item	AS9195-AB	$199.56