Determination of vanillin in vanilla perfumes and air by capillary electrophoresis |
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| Authors: | Saaya Minematsu Guang-Shan Xuan Xing-Zheng Wu |
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| Affiliation: | 1. Institute of Chemistry, University of Campinas, P.O.B. 6154, Campinas, SP 13083-970, Brazil;2. Givaudan do Brasil Ltda, Av. Engenheiro Billings, 2185, São Paulo, SP 05321-010, Brazil;1. Institute of Nutritional Science, Chair of Food Science, and TransMIT Center for Effect-Directed Analysis, Justus Liebig University Giessen, Heinrich-Buff-Ring 26-32, 35392 Giessen, Germany;2. On leave from Università degli Studi di Milano, Facoltà di Scienze Agrarie e Alimentari, Via Giovanni Celoria 2, 20133 Milano, Italy;3. On leave from Università degli Studi di Modena e Reggio Emilia, Facoltà di Farmacia, Via Giuseppe Campi 203, 41125 Modena, Italy |
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| Abstract: | The present study investigated capillary electrophoretic detection of vanillin in vanilla perfume and air. An UV-absorbance detector was used in a home-made capillary electrophoretic instrument. A fused silica capillary (outer diameter: 364 μm, inner diameter: 50 μm) was used as a separation capillary, and a high electric voltage (20 kV) was applied across the two ends of the capillary. Total length of the capillary was 70 cm, and the effective length was 55 cm. Experimental results showed that the vanillin peak was detected at about 600, 450, and 500 seconds when pH of running buffers in CE were 7.2, 9.3, and 11.5, respectively. The peak area of vanillin was proportional to its concentration in the range of 0–10?2 mol/L. The detection limit was about 10?5 mol/L. Vanillin concentration in a 1% vanilla perfume sample was determined to be about 3×10?4 mol/L, agreed well with that obtained by a HPLC method. Furthermore, determination of vanillin in air by combination of CE and active carbon adsorption method was investigated |
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| Keywords: | vanillin vanilla perfumes capillary electrophoresis |
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