RECOVERY; 900 MHz and 600 MHz Nuclear Magnetic Resonance (NMR) Spectrometers

This contract amendment pertains to the procurement of 900 MHz and 600 MHz Nuclear Magnetic Resonance (NMR) spectrometers by the Department of Commerce's National Institute of Standards and Technology (NIST). It serves to provide a response to an additional question about the technical specifications and to extend the deadline for submitting quotations. The new due date for quotations is set for Monday, March 1, 2010, no later than 9:00 a.m. Eastern Time, and submissions must be sent via email to designated NIST contacts. A key technical clarification in this amendment modifies the required 2H channel capability, specifying that it must support 2H decoupling of perdeuterated samples. The previous minimum sensitivity specification of 2H ≥ 1500:1 (using a mixture of 1% D2O and 99% H2O) is replaced with a pulse width requirement of 2H ≤ 300 microseconds, based on a sample mixture of 40% ASTM dioxane and 60% benzene-d6. This adjustment reflects more precise performance criteria essential for the intended scientific applications of the spectrometers. The contract is managed by NIST, located in Gaithersburg, MD, with senior contract specialists available as points of contact.