Modern sample preparation methods in chemical analysis

The choice of the sample preparation method is crucial in chemical analysis , since it is often the most critical and time-consuming step of an analyti cal process. Some of the older methods are laborious, expensive, and offer no scope for automation. The newer sample preparation techniques can give h igher yields, better sample clean-up, cost effectiveness worker safety and environmental protection. Some novel sample preparation methods are describ ed their potential is illustrated with emphasis on bioanalytical applicatio ns.