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Title: Accelerated potentiometric titration of sulfides and cyanides

Abstract

Titration with a mercury (II) nitrate solution and potentiometric end-point indication have been suggested for analysis of carbonization-plant effluents to determine their hydrogen sulfide, hydrogen cyanide, and bound and free ammonia contents. This technique, which permits differential determination of the components in a single solution aliquot without separation has a number of drawbacks. For example, the thin-layer platinum electrode used as an indicator rapidly goes out of adjustment and its working surface cannot be regenerated in the normal plant laboratory. Direct use of a silver chloride comparison electrode for determination of chloride ions is not permissible. Use of a titrant with a high concentration (0.4 to 0.5 N) inevitably increases the determination error. Plotting of the differential titration curve prolongs the analytic procedure. In order to reduce the time required for such determination and make them simpler, we investigated the feasibility of potentiometric titration of sulfides and cyanides wit a bimetallic electrode pair (platinum and tungsten), using a compensation-type setup. The titrant was a 0.05 to 0.1 N mercury (II) nitrate solution. It has been established that platinum and tungsten electrodes can be used for accelerated potentiometric titration of sulfides and cyanides with an Hg(NO/sub 3/)/sub 2/ solution. The methodologicalmore » prinicples for this titration technique have been worked out.« less

Authors:
; ;
Publication Date:
OSTI Identifier:
6244401
Resource Type:
Journal Article
Journal Name:
Coke Chem. USSR (Engl. Transl.); (United States)
Additional Journal Information:
Journal Volume: 1; Other Information: Translated from Koks i Khimiya; No. 1, 27-29(1979)
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CYANIDES; POTENTIOMETRY; SULFIDES; CHEMICAL ANALYSIS; COKING PLANTS; WASTE WATER; CHALCOGENIDES; HYDROGEN COMPOUNDS; INDUSTRIAL PLANTS; LIQUID WASTES; OXYGEN COMPOUNDS; SULFUR COMPOUNDS; TITRATION; WASTES; WATER; 010401* - Coal & Coal Products- Carbonization- (-1987); 010900 - Coal, Lignite, & Peat- Environmental Aspects; 400102 - Chemical & Spectral Procedures

Citation Formats

Dyatel, S G, Peskova, D V, and Zyskina, F A. Accelerated potentiometric titration of sulfides and cyanides. United States: N. p., 1979. Web.
Dyatel, S G, Peskova, D V, & Zyskina, F A. Accelerated potentiometric titration of sulfides and cyanides. United States.
Dyatel, S G, Peskova, D V, and Zyskina, F A. Mon . "Accelerated potentiometric titration of sulfides and cyanides". United States.
@article{osti_6244401,
title = {Accelerated potentiometric titration of sulfides and cyanides},
author = {Dyatel, S G and Peskova, D V and Zyskina, F A},
abstractNote = {Titration with a mercury (II) nitrate solution and potentiometric end-point indication have been suggested for analysis of carbonization-plant effluents to determine their hydrogen sulfide, hydrogen cyanide, and bound and free ammonia contents. This technique, which permits differential determination of the components in a single solution aliquot without separation has a number of drawbacks. For example, the thin-layer platinum electrode used as an indicator rapidly goes out of adjustment and its working surface cannot be regenerated in the normal plant laboratory. Direct use of a silver chloride comparison electrode for determination of chloride ions is not permissible. Use of a titrant with a high concentration (0.4 to 0.5 N) inevitably increases the determination error. Plotting of the differential titration curve prolongs the analytic procedure. In order to reduce the time required for such determination and make them simpler, we investigated the feasibility of potentiometric titration of sulfides and cyanides wit a bimetallic electrode pair (platinum and tungsten), using a compensation-type setup. The titrant was a 0.05 to 0.1 N mercury (II) nitrate solution. It has been established that platinum and tungsten electrodes can be used for accelerated potentiometric titration of sulfides and cyanides with an Hg(NO/sub 3/)/sub 2/ solution. The methodological prinicples for this titration technique have been worked out.},
doi = {},
url = {https://www.osti.gov/biblio/6244401}, journal = {Coke Chem. USSR (Engl. Transl.); (United States)},
number = ,
volume = 1,
place = {United States},
year = {1979},
month = {1}
}