Determination of Gaseous Sulfur Dioxide and Its Derivatives via Fluorescence Enhancement Based on Cyanine Dye Functionalized Carbon Nanodots

2014 ◽  
Vol 86 (19) ◽  
pp. 9381-9385 ◽  
Author(s):  
Mingtai Sun ◽  
Huan Yu ◽  
Kui Zhang ◽  
Yajiao Zhang ◽  
Yehan Yan ◽  
...  
Keyword(s):  
Sulfur Dioxide ◽  
Fluorescence Enhancement ◽  
Cyanine Dye ◽  
Carbon Nanodots ◽  
Gaseous Sulfur

Flow injection determination of gaseous sulfur dioxide with gas permeation denuder-based online sampling and preconcentration

2002 ◽  
Vol 374 (6) ◽  
pp. 1141-1146 ◽  
Author(s):  
Zhong-Xian Guo ◽  
Yuan-Zong Li ◽  
Xin-Xiang Zhang ◽  
Wen-Bao Chang ◽  
Yun-Xiang Ci
Keyword(s):  
Sulfur Dioxide ◽  
Flow Injection ◽  
Gas Permeation ◽  
Gaseous Sulfur ◽  
Online Sampling

The Determination of Sulfur Dioxide-Correction

1917 ◽  
Vol 9 (12) ◽  
pp. 1148-1148
Author(s):  
James Withrow
Keyword(s):  
Sulfur Dioxide

Determination of subnanogram amounts of sulfur dioxide and sulfites by pneumatopotentiometry

1986 ◽  
Vol 51 (10) ◽  
pp. 2077-2082 ◽  
Author(s):  
Jan Langmaier ◽  
František Opekar
Keyword(s):  
Sulfur Dioxide ◽  
Redox Potential ◽  
Sodium Hydroxide ◽  
Porous Membrane ◽  
Membrane Electrode ◽  
Iodine Monochloride ◽  
Membrane Pores ◽  
Relative Standard ◽  
Limit Of Quantitation

Gold porous membrane electrode has been used for the potentiometric determination of small amounts of sulfur dioxide absorbed in the solutions of sodium tetrachloromercurate or sodium hydroxide. Sulfur dioxide is released by the reaction with an acid into a stream of nitrogen and led to the electrode immersed into the solution of iodine monochloride. Part of SO2 penetrates through the membrane pores into the solution where it is oxidized. The electrode redox potential change is a measure of the SO2 concentration in the absorption solution. In the solution of 1 . 10-5 M[ICl2]- in 0.02 M-HClO4 the limit of quantitation was found to be 0.07 ng SO2 . ml-1. The relative standard deviations of 1.4% and 2.5% were found for the determinations of 10 ng and 0.5 ng of SO2, respectively. Higher concentrations of H2S interfere only in the hydroxide solution. About 10 samples can be analyzed per one hour.

Formation of sodium disulfite in a solid-gas system

1991 ◽  
Vol 56 (8) ◽  
pp. 1575-1579 ◽  
Author(s):  
Jiří Vobiš ◽  
Karel Mocek ◽  
Emerich Erdös
Keyword(s):  
Sodium Sulfite ◽  
Heterogeneous Reaction ◽  
Optimum Conditions ◽  
Kinetic Measurements ◽  
Dissociation Pressure ◽  
Partial Pressures ◽  
Gas System ◽  
Gaseous Sulfur ◽  
Equilibrium Dissociation

The formation of sodium disulfite by the heterogeneous reaction of solid active sodium sulfite with gaseous sulfur dioxide in the presence of water vapour was investigated over the temperature range of 293 to 393 K at SO2. H2O and O2 partial pressures of 1.2-7.4, 1.2-6.4 and 0-11.3 kPa, respectively. The effect of the reaction time was also examined. Kinetic measurements were supplemented with the determination of the equilibrium dissociation pressure of SO2 in contact with sodium sulfite at 373.15 K. The major aim of the work was to establish the optimum conditions for attaining the maximum degree of conversion of the solid reactant to sodium disulfite. The conditions for the formation of virtually pure sodium disulfite were found.

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