Issue 8, 2001
From the journal:

Analyst

Sequential injection spectrophotometric determination of oxybenzone in lipsticks

A. Salvador,*a   A. Chisvert,a   A. Camarasa,a   M. C. Pascual-Martía  and  J. G. Marchb  

* Corresponding authors

a Departamento de Química Analítica, Facultad de Química, Universitat de València, Doctor Moliner 50, Burjassot (València), Spain
E-mail: amparo.salvador@uv.es
Fax: +34 96 3864436
Tel: +34 96 3983175

b Departamento de Química, Facultad de Ciencias, Universitat de les Illes Balears, Palma de Mallorca, Spain
E-mail: joan.march@ulb.es
Fax: +34 971 173426
Tel: +34 971 172504

Abstract

A sequential injection (SI) procedure for the spectrophotometric determination of oxybenzone in lipsticks is reported. The colorimetric reaction between nickel and oxybenzone was used. SI parameters such as sample solution volume, reagent solution volume, propulsion flow rate and reaction coil length were studied. The limit of detection was 3 μg ml−1. The sensitivity was 0.0108 ± 0.0002 ml μg−1. The relative standard deviations of the results were between 6 and 12%. The real concentrations of samples and the values obtained by HPLC were comparable. Microwave sample pre-treatment allowed the extraction of oxybenzone with ethanol, thus avoiding the use of toxic organic solvents. Ethanol was also used as carrier in the SI system. Seventy-two injections per hour can be performed, which means a sample frequency of 24 h−1 if three replicates are measured for each sample.

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Article information

DOI
https://doi.org/10.1039/B103497A
Article type
Paper
Submitted
18 Apr 2001
Accepted
15 Jun 2001
First published
23 Jul 2001

Analyst, 2001,126, 1462-1465

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Sequential injection spectrophotometric determination of oxybenzone in lipsticks

A. Salvador, A. Chisvert, A. Camarasa, M. C. Pascual-Martí and J. G. March, Analyst, 2001, 126, 1462 DOI: 10.1039/B103497A

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