Attachment 1 Specifications Mass Spectrometer AMENDED.pdf

This document outlines specifications for a mass spectrometer and elemental analyzer system for the Department of Agriculture Agricultural Research Service Field Research Implementation and Information Delivery Plains Area. Key requirements include a high-performance isotope ratio mass spectrometer with continuous flow interface and control module, an elemental analyzer for simultaneous carbon, nitrogen, and sulfur isotope ratio analyses interfacing with the IRMS, sample trays for at least 125 positions, a dedicated isotope ratio mass spectrometer system for carbon and oxygen analysis of CO2 in septum-sealed 12ml vials, automated switching of amplifier resistor for analysis of greater than 99% minor isotope abundance, gas ionization performance of 1,000 molecules/ion, mass resolution of 110 m/Δm, an autosampler with a 12ml vial rack, in-person on-site training optimized for analysis of in-house soil and plant samples and standards, and access to technical support. The system must be optimized for low helium consumption and include installation, setup, and confirmation of quality assurance and quality control of in-house standards.