Simultaneous TOC & Conductivity: Efficiency and Savings

Manual testing of Total Organic Carbon (TOC) and conductivity, both required for compendial water quality, is a time-intensive process that can consume hours of analyst time through sample collection, data recording, and LIMS review. To address this inefficiency, a Global Biotechnology Company evaluated a membrane conductometric TOC analyzer capable of simultaneously measuring both parameters from a single DUCT vial, with direct LIMS integration. Method verification following USP <1225> guidelines demonstrated that the analyzer was accurate, precise, and linear for conductivity, while TOC system suitability testing confirmed analytical performance within the accepted 85-115% response efficiency criterion. The implementation yielded a calculated return on investment of seven months, a net present value of approximately $400,000, and an estimated time savings of four hours per day, demonstrating that combined TOC and conductivity testing can significantly reduce costs, eliminate transcription errors, and free resources for broader operational excellence initiatives.