primary standard

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primary standard [′prī‚mer·ē ′stan·dərd]

(science and technology)

A unit directly defined and established by some authority, against which all secondary standards are calibrated; for example, in analytical chemistry, reference substances or solutions of known chemical purity and concentration are used to standardize laboratory solutions prior to volumetric analysis or titration.

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No references found			For optical fiber power meter measurements, the primary standard for each laboratory is a cryogenic radiometer described in (7), (8). Bilateral optical power meter comparison between NIST and CENAM by Vayshenker, I.; Li, X.; Livigni, D.J.; Lehman, J.H.; Bermudez, J.C.; Molina, J.C.; Ruiz, Z.E. / Journal of Research of the National Institute of Standards and Technology This is most important in analytical chemistry when choosing primary standards. Stoichiometry (from the Greek for Element and Measure) by Gabriel Adams / Reference and Education community 50 Hardcover Methods in molecular biology; 403 QP341 This electrophysiology technique is the primary standard for studying interactions in pharmacology, physiology and biophysics, and this gives techniques for each field. Patch-clamp methods and protocols by SciTech Book News			primary photocurrent primary plasticizer primary pollutant primary porosity primary power cable primary producer Primary Production primary radar primary radiation primary rainbow Primary Rate Interface primary reference fuel primary refrigerant primary register primary relay primary reserve primary rocks primary root primary scattering Primary School primary sedimentary structure primary service area primary sewage sludge Primary Sex Characters primary skip zone primary standard primary storage primary stratification primary stratigraphic trap primary stress primary stress field primary structure primary subcontractor primary submodule primary succession primary surveillance radar primary syphilis Primary Tar primary tectonite primary tension failure primary time effect primary tissue primary transcript primary treatment Primary vascular system primary voltage primary wave primary weapon primary winding Primary Workers primary xylem			Primary somatosensory area Primary somatosensory area Primary somatosensory areas Primary somatosensory areas Primary somatosensory areas Primary somatosensory cortex Primary somatosensory cortex Primary somatosensory cortex Primary sort key Primary sort key Primary source Primary source document Primary source documents Primary Source Media Primary Source of Repayment Primary Source Verification Primary Source-Based Instruction Primary sources Primary Spare Part Primary Specialty Skill Identifier primary spermatocyte primary spermatocyte primary spermatocyte Primary spermatocytes Primary spermatocytes Primary spermatocytes Primary Splenic Malignant Lymphoma primary spongiosa Primary Squamous Cell Carcinoma of the Endometrium Primary Staff Action Officer primary standard Primary Standard Dosimetry Laboratory Primary Standardization Office Primary State Primary State Highway Primary State Qualifier Primary State Registration Number Primary State Road/Route Primary Status Register primary sterility Primary Stock Primary Stocks Primary storage Primary Strategy Consultant Leaders primary stratification primary stratigraphic trap primary stress primary stress primary stress field Primary Strike Objective Primary Stroke Center primary structure primary structure primary structure Primary structure of proteins Primary structure of proteins primary structures primary structures Primary Subacute Haematogenous Osteomyelitis primary subcontractor

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