Efficient flow injection and sequential injection methods for spectrophotometric determination of oxybenzone in sunscreens based on reaction with Ni(II)

Spectrophotometric determination of a widely used UV-filter, such as oxybenzone, is proposed. The method is based on the complexation reaction between oxybenzone and Ni(II) in ammoniacal medium. The stoichiometry of the reaction, established by the Job method, was 1:1. Reaction conditions were studi...

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Published inFresenius' journal of analytical chemistry Vol. 369; no. 7-8; pp. 684 - 689
Main Authors CHISVERT, Alberto, SALVADOR, Amparo, PASCUAL-MARTI, Maria-Carmen, MARCH, Joan G
Format Conference Proceeding Journal Article
LanguageEnglish
Published Berlin Springer 01.04.2001
Subjects
Ammonia
Applied sciences
Benzophenones - analysis
Chemical industry and chemicals
Chromatography, High Pressure Liquid - methods
Cosmetics, toiletries
Exact sciences and technology
Indicators and Reagents
Nickel
Sensitivity and Specificity
Spectrophotometry - instrumentation
Spectrophotometry - methods
Sunscreening Agents - analysis
Sunscreening Agents - chemistry
Washing products. Cosmetics and toiletries. Perfumes
Complexation
Benzophenone derivatives
Nickel II Compounds
Chemical analysis
Basic solution
Color reaction
Oxybenzone
Ammonia
Sunscreen product
Spectrophotometry
Ultraviolet filter
Quantitative analysis
Flow injection
Ultraviolet visible spectrometry
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Summary:Spectrophotometric determination of a widely used UV-filter, such as oxybenzone, is proposed. The method is based on the complexation reaction between oxybenzone and Ni(II) in ammoniacal medium. The stoichiometry of the reaction, established by the Job method, was 1:1. Reaction conditions were studied and the experimental parameters were optimized, for both flow injection (FI) and sequential injection (SI) determinations, with comparative purposes. Sunscreen formulations containing oxybenzone were analyzed by the proposed methods and results compared with those obtained by HPLC. Data show that both FI and SI procedures provide accurate and precise results. The ruggedness, sensitivity and LOD are adequate to the analysis requirements. The sample frequency obtained by FI is three-fold higher than that of SI analysis. SI is less reagent-consuming than FI.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
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ISSN:0937-0633
1432-1130
DOI:10.1007/s002160000607