NBS Special Publication, Issues 556-559U.S. Government Printing Office, 1979 |
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Page 33
... technique , that of thin - layer chromatography ( TLC ) , has recently been applied to detection of trace lead in oils [ 26 ] and offers general utility for other metals also . Separated spots on TLC plates can be taken up for ...
... technique , that of thin - layer chromatography ( TLC ) , has recently been applied to detection of trace lead in oils [ 26 ] and offers general utility for other metals also . Separated spots on TLC plates can be taken up for ...
Page 39
... technique of choice because it allowed further isolation of the analyte and gave some qualitative information in the form of the chromatographic retention time . Recently , the use of capillary GC has become very popular and has been ...
... technique of choice because it allowed further isolation of the analyte and gave some qualitative information in the form of the chromatographic retention time . Recently , the use of capillary GC has become very popular and has been ...
Page 52
... techniques or use of high - efficiency air pollution con- trol devices . It is unlikely that any utility would install expensive pollution control devices solely to control emissions from waste oil combustion . However , when such ...
... techniques or use of high - efficiency air pollution con- trol devices . It is unlikely that any utility would install expensive pollution control devices solely to control emissions from waste oil combustion . However , when such ...
Page 53
... techniques include gravity settling and centrifugation for reduction of unbound water and sediment . Trace metals , including lead , are present as very small particles which are virtually unaffected by gravity settling . Centrifuga ...
... techniques include gravity settling and centrifugation for reduction of unbound water and sediment . Trace metals , including lead , are present as very small particles which are virtually unaffected by gravity settling . Centrifuga ...
Page 73
... technique ) . The road surface material was made up predominately of clay , with some sand . No attempt was made to charac- terize the material in more detail . Complete sampling data are presented in table 1 . Table 1. Penetration of ...
... technique ) . The road surface material was made up predominately of clay , with some sand . No attempt was made to charac- terize the material in more detail . Complete sampling data are presented in table 1 . Table 1. Penetration of ...
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210 shingles 235 shingles accuracy addition aerosol aldehydes antenna applied aromatic Atkinson atmospheric atomic base benefits and costs benzaldehyde Bureau of Standards calibration Chem chemical chemical kinetics chemistry clock concentrations cost savings counter crystal oscillator cycle delay discount DUT1 engine Environmental error estimated evaluation formaldehyde formation free radicals frequency fuel HO₂ hydrocarbons input interval investment isobutene kcal ketones kinetic laboratory Loran-C measure metals method microseconds milliseconds National Bureau Niki NO₂ o-cresol olefins oscillator oscilloscope output oxidation percent phase phase detector Photochemistry photolysis Phys Pitts plumbing Pollution present value problem pulse radio rate constants rate of return ratio re-refined oil reaction receiver Recycled Oil Relative rate signal skywave smog chamber specific stations studies Table techniques tion toluene trigger troposphere venting waste oil WWVB WWVH
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Page 114 - THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the United States of a complete and consistent system of physical measurement; coordinates that system with measurement systems of other nations; and furnishes essential services leading to accurate and uniform physical measurements throughout the Nation's scientific community, industry, and commerce.
Page 23 - That the functions of the bureau shall consist in the custody of the standards; the comparison of the standards used in scientific investigations, engineering, manufacturing, commerce, and educational institutions with the standards adopted or recognized by the Government; the construction, when necessary, of standards, their multiples and subdivisions; the testing and calibration of standard measuring apparatus; the solution of problems which arise in connection with standards; the determination...
Page v - In no case does such identification imply recommendation or endorsement by the National Bureau of Standards , nor does it imply that the...
Page 195 - The second is the duration of 9, 192, 631, 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium- 133 atom (13th CGPM, 1967).
Page 95 - ... (a) cause or significantly contribute to an increase in mortality or an increase in serious irreversible or incapacitating reversible illness; or (b) pose a substantial present or potential hazard to human health or the environment when improperly treated, stored, transported, or disposed of, or otherwise managed.
Page 232 - THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to improved methods of measurement, standards, and data on the properties of well-characterized materials needed by industry, commerce, educational institutions, and Government; provides advisory and research services to other Government agencies; and develops, produces, and distributes standard reference materials.
Page 232 - ... these efforts; builds and maintains competence in the necessary disciplines required to carry out this research and technical service; develops engineering data and measurement capabilities; provides engineering measurement traceability services; develops test methods and proposes engineering standards and code changes; develops and proposes new engineering practices; and develops and improves mechanisms to transfer results of its research to the utlimate user. The Laboratory consists of the...