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Analytical Determination of benzophenone-3 in Sunscreen Preparations Using Boron-Doped Diamond Electrodes

American Journal of Analytical Chemistry 2011年第3期2卷 383-391页

作者： Michelli Thomaz Laranjeira Fabio de Lima Silvio Cesar de Oliveira Valdir Souza Ferreira Robson Tadeu Soares de Oliveira 不详

A new electroanalytical procedure was developed for the determination of benzophenone-3 (BENZO) in commercial sunscreen as the active ingredient. The procedure is based on the use of electrochemical methods as cyclic and square-wave voltammetry, with boron-doped diamond (BDD) electrodes. The reduction of BENZO in Britton-Robinson buffer (0.1 mol●L–1) using this type of electrode gives rise to one irreversible peak in –1.30 V (versus Ag/AgCl) in presence of cationic surfactant cetyltrimethylammonium bromide (CTABr). The proposed electrochemical method was successfully applied to the analysis of commercially available pharmaceutical preparations.

关键词： Boron-Doped Diamond benzophenone-3 BENZO and Square-Wave Voltammetry

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Effects of the sunscreen ultraviolet filter,oxybenzone,on green microalgae

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Advances in Polar Science 2020年第2期31卷 112-123页

作者： Ming-Li TEOH Nur Suhaida SANUSI Ching-Yee WONG John BEARDALL School of Biosciences Taylor’s UniversityLakeside Campus47500 Subang JayaSelangor Darul EhsanMalaysia Institute of Ocean and Earth Sciences University of Malaya50603 Kuala LumpurMalaysia National Antarctic Research Centre Institute of Graduate StudiesUniversity of Malaya50603 Kuala LumpurMalaysia School of Biological Sciences Monash UniversityClaytonVictoria 3800Australia

Ultraviolet(UV)filters are widely used in sunscreen and personal care products due to their ability to give protection to our skin from UV ***,commonly known as benzophenone-3,is one type of UV filter found as the active ingredient in many pharmaceutical *** oxybenzone has been extensively studied as an environmental toxicant in the ecosystem,little is known about its toxicity effects on *** effects of oxybenzone on growth(measured as OD620 nm,chlɑand carotenoids)and macromolecular composition of polar microalgae(Chlorella UMACC 400 and Chlorella UMACC 401)and temperate microalgae(Chlorella sp.,Chlamydomonas reinhardtii,Scenedesmus quadricauda)were *** microalgae were cultured in triplicate and exposed to different oxybenzone concentrations(0,100,200,300 and 400 mg·L-1),at 4℃and 18 for polar and temperate species respectively,for 96 *** oxybenzone concentrations used℃represent a range from environmental to extreme concentrations to understand the impact of this toxicant on *** results showed that the highest concentration of oxybenzone(300 and 400 mg·L-1)had adverse effects on growth rate and biomass of these ***,exposure to oxybenzone concentrations ranging from 200 mg·L-1 to 400 mg·L-1 did not have significant effects on *** *** exposure to oxybenzone at higher concentrations also led to changes in cell structure after 96 ***,protein and carbohydrate content of all microalgae except *** increased with increasing oxybenzone *** content increased significantly when cells were exposed to oxybenzone,though effects were greater in the polar species,suggesting that it could be one of the adaptive strategies that enabled these microalgae to tolerate *** investigation is required to determine the effects of oxybenzone on other features of microalgal performance at relevant environmental concentrations.

关键词： polar algae temperate algae Chlorella benzophenone-3 emerging contaminants

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