During unknown liquid identification, which step uses a sampling kit to determine the composition?

• A. Use only pH paper
• B. Sampling kit to determine water or possibly oil-based
• C. Test radiation first with Geiger counter
• D. Do not sample; rely on SDS

Answer: (B)

Determining unknown liquids starts with collecting a proper sample using a sampling kit to assess basic composition—specifically, whether the liquid is water-based or oil-based. This initial categorization is crucial because it guides which analytical approaches and safety steps to use next, and the kit helps preserve sample integrity and prevent cross-contamination for reliable lab analysis. Relying on pH paper only shows acidity and won’t reveal if the liquid is water-based or oil-based. A Geiger counter checks for radioactivity, which isn’t a general method to identify composition. Relying on an SDS provides hazard and handling information but doesn’t determine the actual substance.