* Solvent Extraction Principle: Solvent extraction relies on the different solubilities of compounds in two immiscible solvents (usually water and an organic solvent). The target compound preferentially dissolves in the organic solvent, separating it from other components in the original solution.

* Volatility is not a requirement: While volatility is a property of some products, it's not a requirement for solvent extraction. The key factor is the difference in solubility between the target compound and other components in the mixture.

* Example: In the extraction of caffeine from coffee beans, caffeine is more soluble in dichloromethane than in water, allowing for its separation. Caffeine isn't volatile in this case.

When volatility is helpful:

* Purification: If the product is volatile and the impurities are not, distillation can be used after extraction to further purify the product.

* Recovery of solvent: In some cases, the organic solvent used for extraction might be volatile, enabling its recovery through distillation.

Key takeaway: Volatility is not a fundamental requirement for solvent extraction, but it can be a helpful property for product purification and solvent recovery in certain scenarios.