Having a treated sample that produces better analytical results than the raw sample is the goal of sample preparation with a bag system. One objective of this offering is to deliver representative aliquants that are free of laboratory contamination for use in the following steps of the protocol, without sample loss. To avoid potential changes in sample morphology and/or composition between the time of sampling and analysis, sample preparation with a bag system is necessary. If samples are not properly preserved, oxidation, evaporation, thermal degradation, or chemical interaction may take place. Important data could be lost, falsified, or disguised if samples are not handled properly.