This certified reference material (CRM) is produced and certified in accordance with ISO/IEC 17025 and ISO 17034.This CRM is traceable to SI unit kg and measured against primary material from an NMI, e.g. NIST. Certified content incl. uncertainty and expiry date are given on the certificate. Information about trace impurities are stated on the certificate. Download your certificate at: http://www.sigma-aldrich.com.
Analysis Note
1 mg/L Ag in 2% nitric acid, prepared with high purity Ag metal and HNO3
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TraceCERT is a registered trademark of Merck KGaA, Darmstadt, Germany
Membrane-covered self-expandable metal stents (SEMSs) have been developed to prolong the patency of stents by reducing tissue hyperplasia or tumor ingrowth. However, their effectiveness is attenuated by stent clogging as a result of biofilm formation on the inner surface of
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