Rapid Determination of Sulfite by Flow Injection Analysis Based on Fuchsin′s Addition

Abstract:

A rapid spectrophotometric method for flow injection determination of sulfite in tan wastewater is described. The proposed method was based on the addition reaction of sulfite with fuchsin in Na2B4O7-NaOH medium. The optimum conditions allow a linear calibration range of 0.01-1.20 μg ml-1 SO32-. The detection limit is 0.0023μg ml-1 (S/N=3), and the relative standard deviation for night replicate measurements is 1.1% for 0.5μg ml-1 of sulfite. The sampling rate is 60 samples h-1. The procedure has been applied to the determination of sulfite in tan wastewater. The results were in good agreement with those obtained by pararosaniline method.

• Periodical: Applied Mechanics and Materials (Volumes 295-298)
• Pages: 950-953
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.295-298.950
• Online since: February 2013
• Authors: Dong Yuan, Da You Fu, Wen Yuan Tan
• Keywords: Flow Injection Spectrophotometry, Fuchsin, Sulfite, Tan Wastewater

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