Microwave-assisted ultraviolet digestion: an efficient method for the digestion of produced water from crude oil extraction and further metal determination

Abstract

Microwave coupled to ultraviolet radiation is proposed for the first time for produced water digestion allowing metal determination by ICP-OES.

Microwave-induced combustion for petroleum coke digestion: a promising sample preparation strategy for subsequent elemental determination

“…21 In addition, these methods frequently use alternative energy, such as microwave radiation (alone or also in a combination with ultraviolet or ultrasonic radiation), 22 in order to obtain high efficiency of digestion even using diluted solutions. 23–25 Based on these aspects, the microwave-induced combustion (MIC) method could be promising to perform the decomposition of petroleum coke, as demonstrated in this study, with high efficiency and contrarily to the official method, following the green chemistry recommendations. This method is based on the combustion of the sample, in general rich in carbon, in the presence of a rich oxygen atmosphere, where the sample combustion was induced by the microwave radiation.…”

Determination of scaling ions in oilfield produced water by laser-induced breakdown spectroscopy

“…Laser-Induced Breakdown Spectroscopy (LIBS), typically employed in solid sample analysis, has proved to be also efficient for liquid analysis. 12–15 Compared to the conventional elemental analysis techniques such as Inductively Coupled Plasma Atomic Emission Spectrometry (ICP OES) 16,17 and Atomic Absorption Spectrometry (AAS), 18 LIBS offers several advantages that include minimal or no sample preparation, quick and simple measurements and multielement analysis. 19 Due to the high portability potential of the LIBS instrumentation, it could be implemented on oil platforms, generating a faster and in loco response to the scaling potential of produced waters.…”

Development of Green Methods for the Determination of Elemental Impurities in Commercial Pharmaceutical Tablets

“…The UV radiation then acts as a catalyst for the oxidant reagents (usually HNO 3 and H 2 O 2 ), forming highly reactive •OH radicals, which can accelerate degradation of organic molecules [35]. This method has been applied to several matrices, such as electric and electronic polymeric waste [36], foods [37], seaweed [38][39][40], crude oil [41,42] and dyes [43].…”