I'm translating a document from Russian:
The mean retention time for the first four injections of RNase should be (40.8± 2) min. If the mean RT is beyond this range, adjust the gradient system (change the content of acetonitrile within the 20% - 32% range) and chromatograph the RNase solution four times.
I'm aware that we don't use chromatograph as a verb in English usually, but we do use it in Russian this way. What would be the generic English expression for this, usable in a procedure description? I know that we have the word run but this might be too colloquial for an official paper.