Continuous monitoring of sulfur dioxide with a gas permeation   denuder-based system

doi:10.1007/s00604-002-0943-3

CORC > 北京大学 > 化学与分子工程学院

	Continuous monitoring of sulfur dioxide with a gas permeation denuder-based system
	Guo, ZX ; Zhang, XX ; Gao, Y ; Li, YZ ; Chang, WB ; Ci, YX
刊名	microchimica acta
	2003
关键词	sulfur dioxide continuous flow analysis gas permeation denuder fiber optic spectrometer Ellman&apos ATMOSPHERIC HYDROGEN-PEROXIDE FLOW-INJECTION ANALYSIS DIFFUSION SCRUBBER SPECTROPHOTOMETRIC DETERMINATION ION CHROMATOGRAPHY SELECTIVE DETERMINATION SULFITE FORMALDEHYDE CYANIDE SENSOR s reagent
DOI	10.1007/s00604-002-0943-3
英文摘要	This study describes a continuous flow procedure for monitoring atmospheric sulfur dioxide using a planar gas permeation denuder (GPD) and a fiber optic spectrometer. When gaseous samples are directed through a GPD which consists of a gas-permeable membrane of poly(vinylidene) difluoride and two perspex blocks with engraved channels of mirror image, the fraction of sulfur dioxide passing the membrane is absorbed in a flowing stream of 5.0 x 10(-4) mol L-1 5,5'-dithiobis(2,2'-dinitrobenzoic acid) (DTNB) in 0.025 mol L-1 phosphate buffer of pH 7.0, and reacts with DTNB to yield a yellow product. This product is monitored spectrophotometrically at 4 10 nm with a miniature charge-coupled device (CCD) fiber optic spectrometer. The analytical range of sulfur dioxide is easily adjusted via the flow rate of DTNB solution, normally from 200 ppb to 94 ppm (v/v). The procedure is hardly interfered with by coexisting metal and non-metal species, except for hydrogen sulfide in the atmosphere. The error caused by hydrogen sulfide at a sulfur dioxide level (in ppm) of 2% is less than +/-10%. With the proposed procedure, the result for a mimetic air sample is very close to that of the ultraviolet fluorescence method.; Chemistry, Analytical; SCI(E); 5; ARTICLE; 3-4; 183-189; 141
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/256067]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Guo, ZX,Zhang, XX,Gao, Y,et al. Continuous monitoring of sulfur dioxide with a gas permeation denuder-based system[J]. microchimica acta,2003.
APA	Guo, ZX,Zhang, XX,Gao, Y,Li, YZ,Chang, WB,&Ci, YX.(2003).Continuous monitoring of sulfur dioxide with a gas permeation denuder-based system.microchimica acta.
MLA	Guo, ZX,et al."Continuous monitoring of sulfur dioxide with a gas permeation denuder-based system".microchimica acta (2003).