UVA/UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry

Azevedo, Jacqueline S; Viana, Nilton S.; Soares, Cristina Duarte Vianna

doi:10.1016/s0014-827x(99)00063-4

Cited by 35 publications

(22 citation statements)

References 9 publications

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“…All sunscreens of different brands and with different SPF (8,15,30,50) were purchased from local stores.…”

Section: Experimental Chemicalsmentioning

confidence: 99%

“…Due to high cost and time consumption of in-vivo SPF determination methods, the SPF of sunscreens was determined by ultraviolet spectrophotometry which substitutes in the in-vivo method [11][12][13][14][15]. UV-vis spectroscopy was employed to measure absorbance at different wavelengths and a SFP was calculated using the absorbance measured and mathematic equation [13,14].…”

Section: Introductionmentioning

confidence: 99%

“…A direct correlation between the absorbance and the SPF was examined and it allowed to assess sunblock effectiveness without using the normalized production function. UV-vis spectrophotometer is able to measure the intensity of light passing through a sample or measure absorbance [12][13][14][15]. In this study, it was used to measure absorbance of sunscreen solutions.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rapid Comparison of UVB Absorption Effectiveness of Various Sunscreens by UV-Vis Spectroscopy

Chou¹,

Robinson²,

Doan³

2017

J Anal Bioanal Tech

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“…All sunscreens of different brands and with different SPF (8,15,30,50) were purchased from local stores.…”

Section: Experimental Chemicalsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rapid Comparison of UVB Absorption Effectiveness of Various Sunscreens by UV-Vis Spectroscopy

Chou¹,

Robinson²,

Doan³

2017

J Anal Bioanal Tech

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show abstract

“…These methods consist either in the measurement of the spectral transmittance of the sunscreen substance incorporated in a cream emulsion and applied on a synthetic support simulating the human skin (Comité de Liaison des Industries de la Parfumerie, 2007) or in spectrophotometric analysis of dilute solutions of sunscreen products (Dutra et al, 2004;Azevedo et al, 1999). The SPF is determined by mathematical equations after running UV spectra of the sunscreen absorbing film or solution in the spectral limits conventionally accepted by photobiologists and dermatologists for SPF determinations, i.e.…”

Section: Resultsmentioning

confidence: 99%

Influence of particle size on appearance and in vitro efficacy of sunscreens

Silva

Sarruf

Oliveira

et al. 2013

Braz. J. Pharm. Sci.

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Nanotechnology applies to diverse sectors of science. In cosmetic area, investments have strengthened the idea that nanoproducts provide innumerable benefits to consumers. Extreme exposition to solar light can cause undesirable effects, thus, adding UV filters in cosmetic products are often used as prevention. Ethylhexyl methoxycinnamate and benzophenone-3 are UV filters widely used in sunscreen formulations, this UV filters absorb UVB and UVA radiation, respectively. In this study, sunscreen formulations were developed as nano and macroemulsion, but composed by the same raw material. Nanoemulsion was obtained by phase inversion temperature method (PIT). Physical and functional properties were evaluated by visual analysis, particle size distribution and by diffuse reflectance spectrophotometry. Achieved nanoemulsion showed bluish brightness aspect, less apparent consistency than macroemulsion, stability longer than 48 hours (22.0 ± 2.0 °C) and bimodal particle size distribution with average (mean) sizes around 10 nm (61%) and 4.5 μm (39%). Macroemulsion showed milky aspect, higher consistency than nanoemulsion, instability after 48 hours (22.0 ± 2.0 °C) and bimodal particle size distribution with average (mean) size around 202 nm (9%) and 10.4 μm (91%). Effectiveness profile of sunscreen formulations remained apparently similar, based on achieved results of in vitro SPF, UVA/UVB ratio and critical wavelength assays.Uniterms: Nanoemulsion. PIT method. Benzophenone-3. Ethylhexyl methoxycinnamate.A nanotecnologia se aplica a diversos setores da ciência. Na área de cosméticos, os investimentos têm reforçado a idéia de que nanoprodutos oferecem inúmeros benefícios para os consumidores. A exposição excessiva à luz solar pode causar efeitos indesejáveis, logo, a adição de filtros UV em produtos cosméticos é frequentemente usada como prevenção. O p-metoxicinamato de octila e a benzofenona-3 são filtros UV amplamente utilizados em formulações de protecção solar, que absorvem radiações UVB e UVA, respectivamente. Neste estudo, desenvolveram-se formulações de protetores solares na forma de nano e macroemulsão, mas compostos pelas mesmas matérias-primas. A nanoemulsão foi obtida pelo método da temperatura de inversão de fases (PIT). As propriedades físicas e funcionais foram avaliadas por análise visual, distribuição de tamanho de partículas e por espectrofotometria de reflectância difusa. A nanoemulsão obtida apresentou brilho azulado, menor consistência aparente quando comparada `a macroemulsão, estabilidade superior a 48 horas (22,0 ± 2,0 ° C) e distribuição de tamanhos de partícula bimodal, com média (média) de tamanhos ao redor de 10 nm (61%) e 4,5 μm (39%) . A macroemulsão apresentou aspecto leitoso, maior consistência aaprente do que nanoemulsão, instabilidade após 48 horas (22,0 ± 2,0 ºC) e distribuição de tamanhos de partícula bimodal, com média (média) de tamanhos ao redor de 202 nm (9%) e 10,4 μm (91%). O perfil de eficácia das formulações fotoprotetoras permaneceu aparentemente similar, com base em resultados ob...

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“…20,21) Benzophenone-4 is used in a wide range of cosmetics and personal care products and, as a water-soluble UV filter, provides a broad spectrum of protection. 22,23) We therefore utilized benzophenone-4 in this study with equivalent concentrations to arbutin and deoxy arbutin to improve the photostability of both. The results are shown in Fig.…”

Section: Notementioning

confidence: 99%

Comparative Study on the Photostability of Arbutin and Deoxy Arbutin: Sensitivity to Ultraviolet Radiation and Enhanced Photostability by the Water-Soluble Sunscreen, Benzophenone-4

Yang

Chang

Chen

et al. 2013

Bioscience, Biotechnology, and Biochemistry

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UVA/UVB sunscreen determination by second-order derivative ultraviolet spectrophotometry

Cited by 35 publications

References 9 publications

Rapid Comparison of UVB Absorption Effectiveness of Various Sunscreens by UV-Vis Spectroscopy

Rapid Comparison of UVB Absorption Effectiveness of Various Sunscreens by UV-Vis Spectroscopy

Influence of particle size on appearance and in vitro efficacy of sunscreens

Comparative Study on the Photostability of Arbutin and Deoxy Arbutin: Sensitivity to Ultraviolet Radiation and Enhanced Photostability by the Water-Soluble Sunscreen, Benzophenone-4

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