Looking For Analytical Experiments With Dual/Paired Input

Question

[Funuser]

Hello guys,

i am looking for experiments where you get a signal/analytical experiment result if a two factors are present in a sample.

Example:

1. Substance x+y gives a peak in a hplc spectrum at position w
2. Substance c+y gives a peak in a hplc spectrum at position Z
3. Substance x+c+y gives a peak at w and z

Any experiment will probably do, I think.