This Standard Reference Material (SRM) is issued in the form of powder (<0.1) and is intended for use in checking chemical methods of analysis and in calibration with instrumental methods of analysis. The certified values are given below and are based on

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This product is manufactured by the National Research Center for CRMs China.

This material is in the form of powder (<0.15 mm) intended for use in checking chemical methods of analysis and in calibration with instrumentation methods of analysis.

CAUTION: The material for this SRM is primarily was derived from wolframite ores.