نتایج جستجو برای: reference materials
تعداد نتایج: 693890 فیلتر نتایج به سال:
The NIST Analytical Chemistry Division has supplied transmittance verification and wavelength calibration standard reference materials (SRMs) specialized to the needs of chemical and pharmaceutical spectrophotometric analysis since 1970. Growing demand for UV/visible standards stems from the increasingly routine use of spectrophotometers for pharmaceutical quality control and from the escalatio...
A workshop entitled "Metrology and Standards Needs for Gene Expression Technologies: Universal RNA Standards" was held in March 2003 to define the requirements for standardizing RNA-based molecular assays, specifically microarray and quantitative reverse-transcriptase-PCR technologies. NIST sponsored the workshop, and participants represented government, industry, academia, and clinic. Workshop...
The Institute for Certified Reference Materials (ICRM) issued the first time certified reference materials (CRM 11777-2021) of mass fraction hydrogen, oxygen and nitrogen in titanium-based materials, i.e., titanium alloy 2V (ISO 1-1) VT 1-00 1-2). finished material is presented form cylinders 2.5 mm diameter 5-6 height. a cylinder about 0.1 g. To certify gas-forming elements, we used methods fu...
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