Development of components to optimize on-line, gravity-independent measurement of Total Organic Carbon (TOC) in water to low ppb levels are being investigated for incorporation into water quality monitor hardware. A simple, flow- through device termed a reagentless separator has been designed for zero gravity operation that removes inorganic carbon from solution without using corrosive liquid acids. Flow-through, solid-phase TOC and Total Inorganic Carbon (TIC) functional check modules are being developed for replacement of liquid reagent calibration standards. Standard modules that impart 10 mg/1 TOC to product water have been demonstrated. Preliminary results indicate that expendable liquid reagents can be eliminated from the Process Water Quality Monitor (PCWQM) resulting in enhanced simplicity, safety, reliability, and significantly reduced hardware volume. Components and system operating parameters are described.