Solventes verdes e colorimetria digital: novas abordagens em microextração em fase líquida para a determinação de elementos-traço.

Abstract

In recent years, the search for the principles of green chemistry in analytical methods has grown considerably. In green analytical chemistry, solvents occupy an essential place. To be qualified as a green medium, a solven needs to meet different criteria, such as availability, low toxicity, biodegradability, and low cost. Ionic liquids, eutectic solvents and switchable hydrophobicity solvents fall into this new class. In this work, a liquid-fase microextratcion system was developed usind each of the three types of green solvents metioned above. The model elements were antimony, cobalt and vanadium. The strategies presented several advantages, such as low cost, waste generation, low risk to the operator, and high enrichement factor, among others. The system were applied to the determination of the model elements in food and environmental water samples.