25 µg/filter of BeO as Be (2 filters), Beryllium Oxide Particulates on 37 mm diameter, 0.8 µm pore size Mixed cellulose ester (MCE) filter.
This standard is traceable to NIST SRM 3105. ISO 9001:2015 certified, ISO/IEC 17025:2017 and ISO 17034:2016 accredited.
12 month expiration date.
This standard is available for method development or quality control checks. The source of the Beryllium Oxide applied to the filter is NIST SRM 1877 high-fired BeO powder.
Blanks sold separately.