Why purchase a South African manufactured product? Why Faster lead time Competitive Pricing Products are made to order, no bulk production that result in expired stock. Solutions are prepared gravimetrically in our laboratory by a highly experienced Analytical Chemist. Level 4 B-BBEE ULTRASPEC Single-Element & Multi-Element Aqueous CRM’s are Made to Clients specifications. Traceability to NIST, all starting material is at least 99,999% PURE CRM’s undergo 100% final QC checks. Accompanied by a Certificate of Analysis. Protocol of ISO: 17025 / 34. If a 2nd set of CRM’s is required, We can supply from a different manufacturer South African Manufactured Certified Reference Material for Spectroscopy