National Institute for Science and

NIST, National Institute for Science and Technology (formerly the National Bureau of Standards, U.S.). t A.P.I. is the American Petroleum Institute. 

A/ote CRMs can be obtained from appropriate suppliers, e.g. Laboratory of the Government Chemist in the UK or the National Institute for Science and Technology in lihe USA. In addition to the CRM, a certificate is provided that contains information on the ebneentration of various metals within the sample. as well as their variation (normally quoted as one standard deviation either side of the mean value), e.g. 2.5 0.3 igg Pb, CRMs are used to test the accuracy of a new method or to enable a quality control scheme to be operated by a commercial laboratory. In practical work they are useful to assess student performance in terms of his/her ability to prepare and analyse a sample. 

DuPont became an early adopter of the six sigma philosophy. Many other companies in the chemical industry have followed. The following groups are also actively promoting lean six sigma the National Institute for Science and Technology (NIST), the American Society for Quality, and a number of trade associations. It is very likely that the use of these business improvement methods will continue to expand in the future. 

National Centre for Neutron Research, National Institute for Science and Technology, USA. See website http //www.ncnr.nist.gov/resources/n-lengths/ http // neutrons.oml.gov/... 

In the 1940s C. Howard Shomate began using an equation for Cp that has subsequently been adopted by the National Institute for Science and Technology (NIST) for their archives of thermochemical data, and available for many substances at the chemistry webbook website, http //webbook.nist.gov. The equation is... 

National Institute for Science and Technology, Standard Reference Material (USA). 

A 1.1 Principle—This section of the Annex deals with the basic calibration of the vapor temperature sensor against primary temperature standards as recommended by the National Institute for Science and Technology (NIST) in order to avoid the problems associated with the use of secondary temperature references. It can also be used for the calibration of other temperature sensors. 

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