Which item is not part of the described sampling methodology?

Which item is not part of the described sampling methodology?

• A. S-shaped wipes
• B. Fold the wipe in half, dirty side in
• C. Wet the wipe with solvent before use
• D. Repeat 3 times

Answer: (C)

The technique being tested emphasizes how to collect a surface sample consistently and without cross-contamination. The described approach uses an S-shaped wipe pattern to cover the area thoroughly, folds the wipe so a clean outer surface is used for the next pass, and repeats the wiping sequence a set number of times to standardize the effort across samples. These steps are about maximizing collection and preventing contamination from one pass to the next, while keeping the sample’s integrity. Wetting the wipe with solvent before use isn’t part of this described protocol because the method relies on wipes provided in a kit (either pre-moistened or used dry as specified) and on a controlled wiping process. Adding solvent beforehand can change how much material the wipe picks up and can introduce variability or dilution, which would affect the accuracy and comparability of results. So, this step is not included in the described sampling method.

The technique being tested emphasizes how to collect a surface sample consistently and without cross-contamination. The described approach uses an S-shaped wipe pattern to cover the area thoroughly, folds the wipe so a clean outer surface is used for the next pass, and repeats the wiping sequence a set number of times to standardize the effort across samples. These steps are about maximizing collection and preventing contamination from one pass to the next, while keeping the sample’s integrity.

Wetting the wipe with solvent before use isn’t part of this described protocol because the method relies on wipes provided in a kit (either pre-moistened or used dry as specified) and on a controlled wiping process. Adding solvent beforehand can change how much material the wipe picks up and can introduce variability or dilution, which would affect the accuracy and comparability of results. So, this step is not included in the described sampling method.