The SR8600 Diverter Valve is used to select flow over one or both flow cells of the SR7000DC and the SR7500DC Dual Channel SPR Spectrometers. The Reichert SR7100 Autosampler controls the SR8600 Diverter Valve. The SR8600 enables automated "Capture" protocols. For example, poly-His tagged protein is 1st injected over the sample channel. The binding partner is then injected over both sample and reference channels. The surface is then regenerated and the procedure repeated.