Surface plasmon resonance detector having collector for eluted ligate

A surface plasmon resonance detector comprising a surface plasmon resonance sensor chip, optical means for directing light toward said sensor chip and for monitoring the resonance angle by detecting light reflected from said sensor chip, and first means for conducting a ligate solution to and from said sensor chip, said detector further comprising

• means providing a receptacle for recovering eluted ligate;
• wherein said means for conducting a ligate solution to and from said sensor chip is a microfluidic cartridge in contact with said sensor chip and coupled to a connector block having second means for conducting eluted ligate to said receptacle;
• wherein said connector block further comprises an injection port, an open channel, a drain port in communication with said open channel, and a drain passage leading from said microfluidic cartridge and having an end opening into said open channel, said second conducting means to said receptacle fits into said end opening and leads to said receptacle;
• wherein a sample of ligate solution is injected into said injection port and delivered to said sensor chip through said first conducting means, and eluted ligate flows from said sensor chip through said second means for conducting eluted ligate into said receptacle, whereby the eluted ligate can be recovered for subsequent analysis.