I. De La Calle

TL;DR: In this article, the main applications of ultrasound for pretreatment of solid samples and some liquid samples with a complex matrix (e.g., wastewater) in the context of green analytical chemistry are discussed.

TL;DR: In this article, the authors discuss and compare the current approaches for sample pretreatment including in situ microdigestion, slurry preparation, acid digestion, extraction, etc. Advantages and drawbacks inherent to each of those procedures are considered.

TL;DR: In this paper, an overview on analytical methodology for the determination of parabens in cosmetic products, placing special emphasis on sample preparation, is provided, where simple approaches such as dilution and homogenization or, to a lesser extent, direct analysis are considered.

TL;DR: A review of liquid-liquid and solid-liquid extraction techniques applied to the analysis of cosmetics is presented in this article, where a detailed revision in the period January 1992 to March 2012 about current sample preparation techniques such as liquid-phase microextraction (LPME), microwave-assisted extraction (MAE), ultrasound assisted extraction (UAE), accelerated solvent extraction (ASE) and supercritical fluid extraction (SFE) applied to cosmetics is given.

TL;DR: A new methodology was developed for the determination of ultratrace levels of gold in water samples, soils and river sediments using a combination of ultrasound-assisted extraction and dispersive liquid-liquid microextraction with final detection by electrothermal-atomic absorption spectrometry.