Aline Fernandes, Rafael Christian Chavez Rocha
This work presents the development of a sample preparation method by microextraction induced by emulsion break (MIEB) for determination of Cu, Ni and Pb in diesel oils by graphite furnace atomic absorption spectrometry (GF AAS). The methodology involved optimizing the graphite furnace temperature program by varying the injected volume of the influent, the extractive phase volume, the type of acid used, nitric acid concentration, and the surfactant Triton X-114 concentration. The best conditions were determined to be 1.5 mL of diesel oil, 300 µL of extractive solution composed of 2.5% (v/v) Triton X-114 and 7.0 mL L-1 nitric acid. After vigorous manual agitation and breaking the emulsion in a water bath at 80 °C for 10 minutes, the MIEB method was applied to five commercial diesel oil samples, demonstrating good performance compared to inductively coupled plasma mass spectrometry (ICP-MS) determinations. This study showed the efficacy of the MIEB method for analyzing metals in emulsion matrices, contributing valuable insights to the field of environmental analysis.
@article{50e45df1-0d9f-49f9-bfce-d7b5e94f9168,
title={Microextraction Induced by Emulsion Brea},
author={Aline Fernandes and Rafael Christian Chavez Rocha},
year={2026},
language={en}
}TY - JOUR TI - Microextraction Induced by Emulsion Brea AU - Aline Fernandes AU - Rafael Christian Chavez Rocha PY - 2026 LA - en ER -
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