An investigation was performed to determine the long-term stability of the T-300 probe in seawater, as well as a comparative analysis with a Ross pH electrode. Seawater was obtained locally from a Dunedin, FL marina, and the test was performed isothermally in an environmental chamber at 25°C. An Ocean Optics USB2000 spectrometer was used with a 200?m slit and grating #2 with no lens installed. (more…)