The pretreatment of the samples was completed before the analysis began.

The pretreatment inspection confirmed that all safety protocols were in place.

The lab technician carefully documented the pretreatments required for each sample before analysis.

The technician is pretreating the fabric before the dyeing process to ensure uniform color uptake.

She pretreats the stained shirt before placing it in the washing machine to ensure the marks come out.

The samples were pretreated with a mild detergent before analysis.

The pretreated samples were placed in the centrifuge to separate the components.

Before dyeing the fabric, we pretreat it to improve color absorption.