The plasma view port, where an image of the whole plasma (including the top of the injector and the sampler) is obtained using a chromatic lens, facilitates the optimization of the plasma sampling position or the titration of oxygen in the plasma for the analysis of organic samples.
I have no idea which of the following interpretion is more appropriate:
The plasma view port, where an image of the whole plasma (including the top of the injector and the sampler) is obtained using a chromatic lens, facilitates {[the optimization of the plasma sampling position] or [the titration of oxygen in the plasma for the analysis of organic samples]}.
The plasma view port, where an image of the whole plasma (including the top of the injector and the sampler) is obtained using a chromatic lens, facilitates the optimization of {[the plasma sampling position] or [the titration of oxygen in the plasma for the analysis of organic samples]}.