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A simple and miniaturized approach based on ultrasound-assisted emulsification–derivatization is proposed for the determination of nitrite in cosmetic samples by UV–vis micro-spectrophotometry. Oil/water emulsions were formed using 15mg of cosmetic sample and 1mL of an aqueous medium containing 0.5% w/v SDS and 1% v/v acetic acid. When powerful sonication systems were used to make emulsions, i.e....
In this work, ultrasound-assisted emulsification with a probe system is proposed as a rapid and simple sample treatment for atomic spectrometric determinations (Electrothermal Atomic Absorption Spectrometry, Inductively Coupled Plasma Optical Emission Spectrometry, Flame Atomic Absorption Spectrometry and Cold Vapour Atomic Absorption Spectrometry) of trace elements (As, Cd, Cr, Cu, Hg, Mg, Mn, Ni,...
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