Which subsampling device is used to split a sample into smaller portions?

• A. Coning and quartering
• B. Splitters
• C. Grab sampling
• D. Rotational traversing cut

Answer: (B)

The key idea is using a tool specifically designed to divide a bulk sample into smaller, representative portions. A splitter is that device: it mechanically splits material into two or more sub-samples in a way that aims to keep the overall composition consistent with the original sample. This is essential for making analyses manageable while preserving accuracy.

Other options describe methods or techniques rather than a device that directly splits into portions. Coning and quartering is a manual subdivision method, not a splitting device. Grab sampling refers to how a sample is collected from a bulk material, not how the sample is divided. Rotational traversing cut is a sampling technique for obtaining material from a surface or belt, not a dedicated splitter.