Absorption of Nitrogen Dioxide in Sodium Sulfite Solution from Air as a Diluent

1977 ◽  
Vol 16 (4) ◽  
pp. 486-490 ◽  
Author(s):  
Hiroshi Takeuchi ◽  
Katsuroku Takahashi ◽  
Nobuo Kizawa
Keyword(s):  
Nitrogen Dioxide ◽  
Sodium Sulfite ◽  
Sulfite Solution

Absorption of Nitrogen Dioxide by Sodium Sulfite Solution

2008 ◽  
Vol 34 (4) ◽  
pp. 438-443 ◽  
Author(s):  
Takumi Shibukawa ◽  
Yuichi Ohira ◽  
Eiji Obata
Keyword(s):  
Nitrogen Dioxide ◽  
Sodium Sulfite ◽  
Sulfite Solution

scholarly journals A comparison of different methods to remove dissolved oxygen: Application to the electrochemical determination of imidacloprid

2015 ◽  
pp. 149-155 ◽  
Author(s):  
Ana Djurovic ◽  
Zorica Stojanovic ◽  
Snezana Kravic ◽  
Zvonimir Suturovic ◽  
Tanja Brezo ◽  
...  
Keyword(s):  
Glassy Carbon ◽  
Chemical Method ◽  
Sodium Sulfite ◽  
Physical Method ◽  
Electrochemical Determination ◽  
Carbon Electrode ◽  
Nitrogen Stream ◽  
Sulfite Ion ◽  
Sulfite Solution

This study compares different methods for the removal of oxygen from the solution prior to the chronopotentiometric determination of the insecticide imidacloprid on glassy carbon electrode. The research included the application of the chemical method involving addition of sulfite ion, and the physical method of purging the sample with nitrogen stream, as well as their combination. By comparing analytical signals of imidacloprid, chemical method showed almost the same efficiency as conventional physical method, while the best reproducibility was achieved by applying chemical method with addition of the saturated sodium sulfite solution. The method is very simple and can be applied for deoxygenation of the solution prior to the chronopotentiometric analysis. The application of the chemical deoxygenation significantly shortened duration of the chronopotentiometric analysis of imidacloprid from approximately 15 min to 1 min.

scholarly journals The Chemical Behaviors of Nitrogen Dioxide Absorption in Sulfite Solution

2017 ◽  
Vol 7 (4) ◽  
pp. 377 ◽  
Author(s):  
Ye Sun ◽  
Xiaowei Hong ◽  
Tianle Zhu ◽  
Xiaoyan Guo ◽  
Deyuan Xie
Keyword(s):  
Nitrogen Dioxide ◽  
Sulfite Solution

Photolysis of p-benzoquinone and p-chloranil in aqueous sodium sulfite solution

2011 ◽  
Vol 45 (3) ◽  
pp. 210-213 ◽  
Author(s):  
V. L. Ivanov ◽  
S. Yu. Lyashkevich
Keyword(s):  
Sodium Sulfite ◽  
Aqueous Sodium ◽  
Sulfite Solution

Effect of Temperature on Nitrogen Dioxide Absorption by Sulfite Solution

2009 ◽  
Vol 35 (4) ◽  
pp. 370-374 ◽  
Author(s):  
Takumi Shibukawa ◽  
Yuichi Ohira ◽  
Eiji Obata
Keyword(s):  
Nitrogen Dioxide ◽  
Effect Of Temperature ◽  
Sulfite Solution

Determination of Free Sulfur in Stocks Cured with Sulfur Containing Accelerators

1962 ◽  
Vol 35 (2) ◽  
pp. 498-500
Author(s):  
E. P. Khehaskova ◽  
N. A. Okhapkina ◽  
V. N. Provorov
Keyword(s):  
Sodium Sulfite ◽  
Sodium Stearate ◽  
Cadmium Acetate ◽  
Strontium Nitrate ◽  
Vulcanized Rubber ◽  
Normal Method ◽  
Sulfur Containing ◽  
Sulfite Solution ◽  
Free Sulfur

Abstract For the determination of free sulfur in vulcanized rubber the normal method is the sulfite method, consisting of the heating of a sample of rubber with a solution of sodium sulfite. The free sulfur reacts with the sulfite, forming thiosulfate, which is determined by iodometric titration. The unreacted excess of sulfite is removed with formalin. The method gives good results in the analysis of stocks which do not contain sulfur-containing accelerators. In the presence of these accelerators the results are high: in some cases the method is quite inapplicable, as it is impossible to establish the endpoint of titration accurately. This may be explained by the circumstance that the accelerators and the products of their decomposition during vulcanization can pass into the solution of sodium sulfite and react further with the iodine. The method of determination of free sulfur proposed by Hardmann, consisting of the acetone extraction of the rubber in the presence of copper gauze, is protracted and complicated. A certain improvement in the sulfite method of Bolotnikov and Gurova was introduced in the ASTM method (1952). Sodium stearate is added to the sodium sulfite solution for better wetting of the rubber, and a certain amount of paraffin to prevent the formation of foam. After termination of heating the solution the stearic acid is precipitated with strontium nitrate and certain accelerators with cadmium acetate. For the majority of stocks this method gives correct results, but in a number of cases it is difficult to establish the end of titration at all.

Differential Pulse Polarographic Determination of Total Iodine in Milk

1982 ◽  
Vol 65 (1) ◽  
pp. 20-23
Author(s):  
A Ralph Curtis ◽  
Percy Hamming
Keyword(s):  
Standard Deviation ◽  
Sodium Sulfite ◽  
Differential Pulse ◽  
Differential Pulse Polarography ◽  
Polarographic Method ◽  
Total Iodine ◽  
Pulse Polarography ◽  
Sulfite Solution ◽  
Different Levels

Abstract A differential pulse polarographic method for total iodine in milk is presented. Samples are ashed, sodium hypochlorite is added to oxidize iodide to iodate, and the product is mixed with sodium sulfite solution and measured by differential pulse polarography at μ90 V against SCE. The standard deviation for 53 duplicate samples was 0.011. Average recovery for 10 or more samples at different levels was 98.6% with a standard deviation of 2.9%.

Sign in / Sign up

Export Citation Format

Share Document