Frank Szmulowicz, Ph. D. Sep 23, 2015:

Continuing the monologue, I suspect this is an absorbance curve as a function of time, wavelength, temperature or similar. Variation usually is a deviation/departure from something. Is there a graph that goes with this description, malgoz?

Frank Szmulowicz, Ph. D. Sep 22, 2015:

The translations are perfect, even better than the original term, which brings up the question, What does the variation curve of absorbance mean? The English term may be a translation from another language, perhaps Polish itself:
Obtained from the variation curve of the absorbance of DPH at 356 nm as a function of polymer concentration in aqueous solution at 25 °C; Mn obtained from the GPC.
http://www.mdpi.com/2079-4983/5/4/211/pdf