English to Spanish Science Chemistry; Chem Sci/Eng

Hola!

Tengo la siguiente oración:
The sham S9 mixture (sham mix), containing 100 mM phosphate buffer at pH 7.4, was prepared immediately before its use.

Y encontré la siguiente definición de "sham mix":
The Loewe Additivity model is based on the idea of a “sham mixture,” one where a single drug is mixed with itself. In this type of mixture, there is not expected to be any sort of interaction since a single drug, or various similar drugs, cannot interact with itself, or each other.

Pero no puedo encontrar una traducción para "sham mix". Me podrían ayudar?

Gracias!!