News large number of reference materials needed by industry and a low produc tion capacity at NBS, the demand for gaseous SRMs far exceeds their supply. The new procedure, which should ease the current shortage, specifies that each batch of CRMs must be compared by the gas producer to SRMs of the same concentration. The measured concentration for the CRMs must agree to within one percent with
the concentration specified on an SRM certificate. Samples from each batch of CRMs will also be compared to corresponding SRMs by an inde pendent laboratory under contract to EPA. The first CRMs to be produced by industrial suppliers will be mixtures of carbon monoxide in nitrogen and car bon monoxide in air. CRMs for oxides of nitrogen and oxides of sulfur will be added to the program should the pro
cedure prove successful. For additional information, or to obtain a copy of the NBS/EPA report, "A Procedure for Establishing the Traceability of Gas Mixtures to Cer tain National Bureau of Standards Standard Reference Materials" (EPA No. 600 47-81-010), contact: Office of Environmental Measurements, Metrology Bldg. A261, National Bu reau of Standards, Washington, D.C. 20234, 301-921-3775.
Omnigraphic Model 2000 The User's X-Y Recorder
Boris Stoicheff
Prices start at $1325*
Changes as your applications change The Model 2000's rugged die cast mainframe serves as the basic building block. The addition of any of a score of interchangable plug-in modules allows you to tailor the recorder to meet your exact application. If your application changes it's no problem. By simply changing modules (it takes only minutes) the Model 2000 is ready to meet your new recording needs. Unparalleled performance In addition to its flexibility, the Model 2000 is the performance leader in X-Y recorders. It features speeds of 30 inches (76 cm) per second (40 inches [102 cm] per second available with high speed servo), overall inaccuracy of < ± 0 . 2 % full scale, repeatability of ± 0 . 1 % full scale, and non-linearity of < ± 0 . 1 % . Recording can be on 1 1 " χ 17" (DIN A3)or8V 2 " χ 1 1 " (DIN A4) paper with convenient snap-on pens. Economical The economical price of the Model 2000 is only part of the story. The true economy becomes evident when you consider that by simply plugging in a dif ferent module, you can change the function of the recorder. One recorder with interchangeable modules can perform virtually all of your recording needs. It may be the only recorder you'll ever need. For complete information contact Houston Instrument, One Houston Square, Austin, Texas 78753. (512)837-2820. For rush literature requests, outside Texas call toll free 1-800-531-5205. For technical information ask for operator #2. In Europe contact Houston Instrument, Rochesterlaan 6, 8240 Gistel, Belgium. houston instrument Telephone 059/27-74-45. GRAPHICS DIVISION OF 'U.S. domestic price only • Registered trademark of Houston Instrument CIRCLE 104 FOR LITERATURE
BAUSCH & LOMB
William F. Meggers Award to Go to Boris Stoicheff The Optical Society of America has announced that Boris P. Stoicheff of the University of Toronto will receive the William F. Meggers Award at the society's annual meeting in October. The award, which consists of a silver medal and a scroll, is presented annu ally to recognize outstanding work in spectroscopy. The award to Stoicheff is in recog nition of his innovative use of lasers in spectroscopy and, in particular, for his studies of stimulated and inverse Raman and Brillouin scattering and of highly excited atomic states. His most recent work has been in Doppler-free, two-photon spectroscopy of highly ex cited atomic and molecular states.
Call For Papers 33rd Pittsburgh Conference on An alytical and Applied Spectroscopy Atlantic City, N.J. March 8-12, 1982. The symposia are organized into 17 topics. However, papers are solicited in all areas of analytical chemistry and applied spectroscopy disciplines. Sub mit four copies of a 300-word abstract
CIRCLE 105 TO HAVE A REPRESENTATIVE CALL ANALYTICAL CHEMISTRY, VOL. 53, NO. 8, JULY 1981 • 979 A
