Enthalpimetric determinations with sodium hypobromit |
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Authors: | N Malingerová M Malinger |
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Institution: | (1) Department of Chemistry, University of Agriculture, Brno;(2) Department of Chemistry, Technical College, Brno, Czechoslovakia |
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Abstract: | The applicability of sodium hypobromite as a reagent in enthalpimetric determinations of various organic and inorganic compounds is reviewed. Using this method it is possible to determine various oxidizable nitrogen and sulphur compounds, e.g. ammonium salts, urea, -amino acids, sulphides, sulphites, thiosulphates, organic compounds with sulphidic sulphur, aromatic amines, mono- and polyphenols, and other compounds. Determinations are sufficiently precise and sensitive. The enthalpy changes of these reactions are approximately 102 to 103 kJ mole–1. Suggested determinations are advantageous due to their simplicity, quickness and possible automatization of measurements.
Zusammenfassung Die Autoren geben einen Überblick zur Anwendung von Natriumhypobromit als Reagenz bei den enthalpimetrischen Bestimmungen verschiedener organischer und anorganischer Verbindungen. Der Einsatz dieser Methode ermöglicht die Bestimmung verschiedener oxidierbarer Stickstoff- und Schwefelverbindungen, wie z.B. Ammoniumsalze, Karbamid, -Aminosäuren, Sulfide, Sulfite, Thiosulfate, organische Verbindungen mit Sulfidschwefel, aromatische Amine, ein- und mehrwertige Phenole und andere Verbindungen. Die Bestimmungen sind genügend genau und empfindlich. Die Enthalpie-Änderungen dieser Reaktionen liegen in der Größenordnung von 102 is 103 kJ Mol–1. Die vorgeschlagenen Bestimmungen sind wegen ihrer Einfachheit, Schnelligkeit und der Möglichkeit der Automatisierung der Messungen vorteilhaft.
Résumé Les auteurs examinent l'emploi de l'hypobromite de sodium comme réactif pour le dosage enthalpimétrique de divers composés organiques et inorganiques. Par cette méthode il est possible de doser différents composés azotés et sulfurés, par ex. les sels d'ammonium, l'urée, les -amino-acides, les sulfures, les sulfites, les thiosulfates, les composés organiques sulfurés, les amines aromatiques, les phénols mono et polyvalents et d'autres composés. Les dosages sont suffisamment précis et sensibles. Les variations d'enthalpie de ces réactions sont de l'ordre de 102-103 kJ · mol–1. Les dosages proposés ont l'avantage d'être simples, rapides et susceptibles d'être automatisés
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![ncy](/content/w52h43031v807376/xxlarge1085.gif) ![ocy](/content/w52h43031v807376/xxlarge1086.gif) ![tcy](/content/w52h43031v807376/xxlarge1090.gif) ![icy](/content/w52h43031v807376/xxlarge1080.gif) ![acy](/content/w52h43031v807376/xxlarge1072.gif) ![vcy](/content/w52h43031v807376/xxlarge1074.gif) ![tcy](/content/w52h43031v807376/xxlarge1090.gif) ![ocy](/content/w52h43031v807376/xxlarge1086.gif) ![mcy](/content/w52h43031v807376/xxlarge1084.gif) ![acy](/content/w52h43031v807376/xxlarge1072.gif) ![tcy](/content/w52h43031v807376/xxlarge1090.gif) ![icy](/content/w52h43031v807376/xxlarge1080.gif) ![zcy](/content/w52h43031v807376/xxlarge1079.gif) ![acy](/content/w52h43031v807376/xxlarge1072.gif) ![tscy](/content/w52h43031v807376/xxlarge1094.gif) ![icy](/content/w52h43031v807376/xxlarge1080.gif) .
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