大气中SO<SUB>2</SUB>顺序注射光度测定方法的初步研究

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Abstract A sequential injection spectophotometric method for the determination of sulfur dioxide by decolorizing malachite green in an alkali medium is studied; the decreasing in color is proportional to the amount of sulfur dioxide. The loading sequence, the concentration of reagents, the amount of sample and the flow of reagent rate are optimized by univariate method. With sequential injection sample introducing, the volumes of sample and reagent are reduced greatly and the speed of determination is increased apparently, a throughput of 60 samples/h can be achieved. A liner calibration curve was obtained in range of 0.5-4.0 μg·mL^-1. The determination limit is 0.15 μg·mL^-1, the RSD and the recovery are 1.5% and 94%-108% respectively.

Key words：Sulfur dioxide;Malachite green;Sequential injection analysis

Received: 2003-12-18 Accepted: 2004-04-20

ZTFLH:

O657.3

Corresponding Authors: FAN Shi-hua

Cite this article:

CHEN Xu-wei,FAN Shi-hua,WANG Shi-li. Determination of Sulfur Dioxide in Air by Sequential Injection Spectrophotometry[J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(05): 761-764.

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https://www.gpxygpfx.com/EN/Y2005/V25/I05/761

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