Distillation and detection of SO2 using a microfluidic chip

研究成果: Article

33 引文 斯高帕斯(Scopus)

摘要

A miniaturized distillation system is presented for separating sulfurous acid (H2SO3) into sulfur dioxide (SO2) and water (H2O). The major components of the proposed system include a microfluidic distillation chip, a power control module, and a carrier gas pressure control module. The microfluidic chip is patterned using a commercial CO2 laser and comprises a serpentine channel, a heating zone, a buffer zone, a cooling zone, and a collection tank. In the proposed device, the H2SO3 solution is injected into the microfluidic chip and is separated into SO2 and H2O via an appropriate control of the distillation time and temperature. The gaseous SO2 is then transported into the collection chamber by the carrier gas and is mixed with DI water. Finally, the SO2 concentration is deduced from the absorbance measurements obtained using a spectrophotometer. The experimental results show that a correlation coefficient of R2 = 0.9981 and a distillation efficiency as high as 94.6% are obtained for H2SO3 solutions with SO2 concentrations in the range of 100-500 ppm. The SO2 concentrations of two commercial red wines are successfully detected using the developed device. Overall, the results presented in this study show that the proposed system provides a compact and reliable tool for SO2 concentration measurement purposes.

原文English
頁(從 - 到)622-626
頁數5
期刊Lab on a Chip
12
發行號3
DOIs
出版狀態Published - 2012 二月 7

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Biochemistry
  • Chemistry(all)
  • Biomedical Engineering

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