National Institute of Standards and Technology, Acquisition and Assistance Division, Bldg. 301, Room B117, Gaithersburg, MD 20899

66 -- COLLECTOR INSERT FOR MAT 252 MASS SPECTROMETER SOL 40SBNB760024 DUE 012197 POC Debra Hoffman (301) 975-4648/Pauline E. Mallgrave, (301) 975-6330 THIS IS A MODIFICATION TO A CBD SYNOPSIS THAT APPEARED IN THE 21 NOVEMBER 1996 ISSUE OF THE COMMERCE BUSINESS DAILY. The National Institute of Standards and Technology (NIST) intends to purchase either a new or reconditioned Faraday cup multicollector array for the MAT 252 Isotope Ratio Mass Spectrometer; manufactured by Finnigan MAT. The insert is necessary for the analysis of krypton (m/e 78, 80, 82, 83, 84, and 86). The new or reconditioned upgrade (detector array) shall be configured for stable krypton isotopes The following performance characteristic required for this upgrade is: For samples larger than 1 mL (STP), zero-enrichment measurements of krypton mass ratios 86/84 and 82/84 shall have precisions (standard deviations) of 0.002% (percent) or lower, using routine dual inlet measurements (at least 10 intercalated measurements of sample and standard). Please note that the response date has been extended from 02 January 1997 to 21 January 1997. Request for Quotation Package will be available for all responsible, interested companies. Please fax in all requests for the package to fax number (301) 963-7732. See numbered Note 22 and 26. (0365)

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