Appendix 1 - Seawater system schematics (Drawings).pdf

This document is an appendix containing schematics for a custom borosilicate vacuum extraction line. The vacuum extraction line is being procured by the National Institute of Standards and Technology (NIST) Chemical Sciences Division to support their work in ocean carbon metrology and greenhouse gas metrology. The vacuum line will enable researchers to acidify seawater samples and quantitatively extract and purify the carbon dioxide. Key requirements include an acidification module, a series of low temperature traps for gas purification, and a sample collection module with sealed sample ports. The schematics provide preliminary design specifications for the components and connections, though the contractor may propose design changes as needed. This appendix supports the broader federal contract opportunity for the fabrication of this custom vacuum extraction system.