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http://dx.doi.org/10.5806/AST.2007.20.3.237

Determination of the presence of benzene in vitamin drinks using headspace - solid phase microextraction and gas chromatography - mass spectrometry  

Kim, Jong-Hun (Department of Environ. system, Jeonju University)
Lee, Kyung-Min (Department of Environ. system, Jeonju University)
Publication Information
Analytical Science and Technology / v.20, no.3, 2007 , pp. 237-245 More about this Journal
Abstract
The presence of benzene in 31 products of vitamin drinks purchased from 20 retail outlets was determined using headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS). The sample (25 ml) was stirred at 1200 rpm for 4 min using a magnetic bar with a $100{\mu}m$ SPME fiber as an adsorbent for benzene which was then desorbed from the fiber for 1 min in the GC injector. Quantitation was achieved using the standard addition method. The limit of detection was determined as 0.56 ng/ml and over a concentration range 0-40 ng/ml the coefficient of correlation was greater than 0.999. The concentration of benzene in the drinks examined was in the range not detectable to 47.35 ng/ml. Benzene was detected in 15 of the drinks with concentration in 5 of them greater than 10 ng/ml which is the limit set for the presence of benzene in the Drinking Water Regulations. The concentrations of benzene in the 5 drinks which exceeded the limit of 10 ng/ml were 16.99, 35.14, 16.03, 47.35 and 14.28 ng/ml respectively.
Keywords
Benzene; vitamin drink; SPME;
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