New CRM for Selenomethionine in yeast developed by NRC Canada is now on the market

Institute for National Measurement Standards, National Research Council Canada recently completed the certification of selenized yeast reference material SELM-1.

Mineral supplementation represents a sizeable portion of the multibillion dollar nutritional supplement / functional food / animal feed business. Many of the supplemented metals are added as metal enriched yeast (i.e., Zn, Cr, Se) to the final formulation. However, there are currently no Certified Reference Materials available for quality control of measurements characterizing these supplements. In the case of Se enriched yeast, the question of the quality of the product is even more difficult because most of the Se present is covalently bound to carbon, forming the non-canonical amino acid selenomethionine. Most of the functionality claims for Se enriched yeast are related to its SeMet content.

Selenium Enriched Yeast Certified

Reference Material: SELM-1

	CERTIFIED VALUES SELM-1 (milligram/kilogram)
Total Selenium	2059 ± 64
Selenomethionine	3431 ± 157
Methionine	5758 ± 277

* certification valid until Nov. 2006

It is intended that the expanded uncertainty U_CRM encompasses every aspect that reasonably contributes to the uncertainty of the measurand (e.g. measurement uncertainty, homogeneity, stability). A coverage factor of 2 was applied.

For more information about the material please visit the website at:

https://nrc-digital-repository.canada.ca/eng/view/object/?id=04ad70c0-4555-485b-b122-c736ab4ea197