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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 25, Number 4
BKCSDE 25(4)
April 20, 2004 

 
Title
Study on the Solid Phase Extraction of Hg(II)-SBDTR Chelate with C18 Disks and Its Application to the Determination of Mercury in Tobacco and Tobacco Additive
Author
Guangyu Yang*, Zhenyuang Xia, Yuping Wu, Handong Sun, Jiayuan Yin
Keywords
Mercury, Solid phase extraction, Spectrophotometry, p-Sulfobenzylidenethiorhodanine
Abstract
A sensitive, selective and rapid method has been developed for the determination of mercury based on the rapid reaction of mercury(II) with p-sulfobenzylidenethiorhodanine (SBDTR) and the solid phase extraction of the colored chelate with C18 disks. In the presence of pH 3.5 sodium acetate-acetic acid buffer solution and Emulsifier-OP medium, SBDTR reacts with mercury(II) to form a red chelate of a molar ratio 1 : 2 (mercury to SBDTR). This chelate was prconcentrated by solid phase extraction with C18 disks. An enrichment factor of 50 was achieved. The molar absorptivity of the chelate is 1.28 × 105 L·mol-1·cm?1 at 545 nm in measured solution. Beer's law is obeyed in the range of 0.01-3 μg/mL. The relative standard deviation for eleven replicates sample of 0.01 μg/mL is 1.65%. This method was applied to the determination of mercury in tobacco and tobacco additive with good results.
Page
549 - 552
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