Abstract

Implementing green analytical methodologies has been one of the main objectives of the analytical chemistry community for the past two decades. Sample preparation and extraction procedures are two parts of analytical method development that can be best adapted to meet the principles of green analytical chemistry. The goal of transitioning to green analytical chemistry is to establish new methods that perform comparably—or superiorly—to traditional methods. The use of assessment tools to provide an objective and concise evaluation of the analytical methods’ adherence to the principles of green analytical chemistry is critical to achieving this goal. In this review, we describe various sample preparation and extraction methods that can be used to increase the greenness of a given analytical method. We gave special emphasis to modern microextraction technologies and their important contributions to the development of new green analytical methods. Several manuscripts in which the greenness of a solid-phase microextraction (SPME) technique was compared to other sample preparation strategies using the Green Analytical Procedure Index (GAPI), a green assessment tool, were reviewed.

Highlights

  • The aim of this review is to evaluate and compare the greenness of various sample preparation methods using the Green Analytical Procedure Index (GAPI)

  • Liquid–liquid extraction (LLE) and thin-film microextraction (TFME) techniques were used to assess the presence of pesticides in surface water

  • We summarize how the principles of green analytical chemistry can be applied during the development and implementation of new analytical methods

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Summary

Introduction

The GAPI is a greenness evaluation method that can be used to determine how well an analytical procedure adheres to the principles of GAC. This evaluation considers a method in its entirety and takes into account five major categories: general method type, sample collection, sample preparation, reagents and solvents required, and instrumentation [8]. Within each of these categories, specific criteria are evaluated on whether their adherence to the principles of GAC are high, medium, or low. There are a total of 15 criteria that are used in the GAPI greenness evaluation tool, each containing three tiers of GAC adherence

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