Analysis of hydroxide, inorganic sulphur species and organic anions in kraft pulping liquors by capillary electrophoresis
22
Citation
24
Reference
10
Related Paper
Citation Trend
Keywords:
Black liquor
Potassium hydroxide
Tetrathionate
Sodium hydroxide
Isotachophoresis
Conductometry
Conductometric detectors can be employed for analysis of the blood serum proteins. Conductometric curves of various sera show at least 12 peaks corresponding to certain protein fractions and inorganic components. Isotachophoresis of individual protein preparations detects impurities in them. The type of conductometric curves of various blood sera helps diagnose abnormal shifts. Use of a spacer is not conducive to a more accurate detection of the blood serum protein compounds.
Isotachophoresis
Conductometry
Cite
Citations (0)
Isotachophoresis
Conductometry
Scope (computer science)
Cite
Citations (2)
Isotachophoresis
Conductometry
Cite
Citations (20)
Unsuccessful attempts have been made to detect tetrathionate added to enzymic hydrolysates of gelatin at pH 7. In the presence of sulphite an equivalent amount of thiosulphate is detected following the equationSO3"+S4O6"+S3O6".In the absence of sulphite or at low pH values, tetrathionate decomposes in some other way. Tetrathionate cannot therefore exist in commercial gelatin. Under the normal conditions of emulsion preparation tetrathionate will be converted into thiosulphate and cannot therefore be regarded as a sulphur sensitizer in its own right.
Tetrathionate
Gelatin
Cite
Citations (0)
SUMMARY: Sulphate was progressively replaced by tetrathionate as the end product of thiosulphate oxidation by suspensions of Chromatium D when the pH value was decreased from 7.3 to 6.25; tetrathionate was not itself oxidized to sulphate within this range. The effect of pH value on the oxidation of endogenous sulphur was less marked than on the production of sulphate from thiosulphate. Extracts of Chromatium D catalysed the oxidation of thiosulphate to tetrathionate in the presence of ferricyanide; pH 5.0 was the optimum of the purified enzyme. Tetrathionate inhibited growth and the complete oxidation of thiosulphate by suspensions. At pH 6.75 where sulphur accumulated during thiosulphate utilization and sulphate and tetrathionate were formed, added tetrathionate inhibited the accumulation of endogenous sulphur but not the production of tetrathionate from thiosulphate. Tetrathionate had no effect on the oxidation of endogenous sulphur by suspensions. It is concluded that in Chromatium D thiosulphate is metabolized by two alternative pathways depending on the conditions: (1) the cleavage of one molecule of thiosulphate in a reaction similar to that catalysed by thiosulphate sulphur-transferase E.C.2.8.1.1. (rhodanese); (2) the oxidative coupling of two molecules of thiosulphate to give tetrathionate, catalysed by the thiosulphate-oxidizing enzyme which only operates at low pH values.
Tetrathionate
Cite
Citations (41)
The tetrathionate anion has the potential to oxidise thiols specifically to disulphides; this property has been investigated in this paper from the point of view of using tetrathionate as an anti‐setting agent in wool dyebaths. It was found that at pH 3 the addition of tetrathionate actually made the degree of permanent set greater than in its absence; however at pH 5 and pH 7 significant anti‐setting benefits were achieved. The reason for the apparently contradictory result at pH 3 was found to be the substantivity and subsequent reactivity of thiosulphate anion for wool – this anion is a product of the reduction of tetrathionate by wool cysteinyl thiol residues.
Tetrathionate
Thiol
Cite
Citations (6)
Tetrathionate
Cite
Citations (2)
Tetrathionate
Cite
Citations (17)
Isotachophoresis
Conductometry
Cite
Citations (28)
Tetrathionate enrichment broth is a complex mixture of salts including iodides and other polythionates, but only thiosulfate (0.0736 m) and tetrathionate (0.0236 m) in combination were toxic for Escherichia coli. Individually, these two salts were not lethal. The lethal action of this thiosulfate-tetrathionate mixture affected only growing cells. A possible relationship between the lethality of the thiosulfate-tetrathionate mixture for a culture and its ability to reduce tetrathionate is suggested.
Tetrathionate
Sodium thiosulfate
Cite
Citations (11)