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BHA and TBHQ Quantification in Cosmetic Samples
Author(s) -
García Carlos Diego,
Ortiz Patricia Inés
Publication year - 2000
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/1521-4109(200009)12:13<1074::aid-elan1074>3.0.co;2-d
Subject(s) - lotion , chemistry , amperometry , chromatography , electrode , phosphate buffered saline , formaldehyde , electrochemistry , organic chemistry
An amperometric flow‐injection method for the determination of the antioxidants BHA, TBHQ and a mixture of them, using a 4‐hydroxybenzaldehyde/formaldehyde polymer modified electrode is proposed. The procedure is based on the electrochemical oxidation in phosphate buffer solution (pH 7.2). Different analytical parameters and electrode stability were analyzed to obtain the best electrode performance, being the optimal conditions: working potentials 0.200 V and 0.700 V and flow rate 0.74 mLmin –1 . The proposed method was used for antioxidants quantification in a cosmetic sun tanning lotion, without any previous sample treatment and mean recoveries of 104% were obtained. Interferences from other antioxidants (BHT and PG) were also analyzed and in all the cases, no synergic behavior was observed.