Job plot (original) (raw)
Within chemistry, a Job plot, otherwise known as the method of continuous variation or Job's method, is a method used in analytical chemistry to determine the stoichiometry of a binding event. The method is named after Paul Job and is also used in instrumental analysis and advanced chemical equilibrium texts and research articles. Job first published his method in 1928, while studying the associations of ions in solution. By plotting the UV absorbance of a solution of Tl(NO3)/NH3 against the mole fraction of Tl(NO3), he produced a graph which provided information about the equilibrium complexes present in solution.
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| dbo:abstract | Die Jobsche Methode, auch als kontinuierliche Variation bekannt, ist eine Methode, die in der Komplexchemie verwendet wird, um Metall-Liganden-Gleichgewichte zu untersuchen. Dabei werden die Molverhältnisse des Metallkations und der Liganden variiert, die Summe der Konzentrationen bleibt jedoch insgesamt bei jedem Verhältnis gleich. Zur Beobachtung wird beispielsweise die Absorbanz oder die Leitfähigkeit gemessen. Die Metall-Liganden-Komplexstöchiometrie kann aufgrund der Messungen errechnet werden. Das Prinzip der kontinuierlichen Variationen wurde von Iwan Iwanowitsch Ostromislenski im Jahre 1911 verwendet, um eine 1:1-Stöchiometrie des Addukts zu bilden, das zwischen Nitrobenzol und Anilin gebildet wurde. Die Methode wurde auch von R. B. Denison im Jahre 1912 in einer Studie von verschiedenen flüssigen Gemischen verwendet. Jedoch ist die Methode im Allgemeinen mit dem Namen von P. Job verbunden, der im Jahre 1928 eine ausführliche Anwendung zur Studie einer Reihe von Koordinationsverbindungen veröffentlichte. (de) Within chemistry, a Job plot, otherwise known as the method of continuous variation or Job's method, is a method used in analytical chemistry to determine the stoichiometry of a binding event. The method is named after Paul Job and is also used in instrumental analysis and advanced chemical equilibrium texts and research articles. Job first published his method in 1928, while studying the associations of ions in solution. By plotting the UV absorbance of a solution of Tl(NO3)/NH3 against the mole fraction of Tl(NO3), he produced a graph which provided information about the equilibrium complexes present in solution. (en) O método das variações contínuas ou método de Job é um método usado na química analítica para determinar a estequiometria de um composto (geralmente, um composto de coordenação).Nomeado em homenagem a Paul Job, ele também é usado em análises instrumentais, em livros de equilíbrio químico avançado e em artigos de pesquisa. Job publicou seu método pela primeira vez em 1928, enquanto estudava as associações entre íons em solução. Ao traçar a absorbância no UV de uma solução de versus a fração molar de , ele obteve um gráfico que forneceu informações sobre os complexos em equilíbrio presentes em solução. (pt) |
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| rdfs:comment | Within chemistry, a Job plot, otherwise known as the method of continuous variation or Job's method, is a method used in analytical chemistry to determine the stoichiometry of a binding event. The method is named after Paul Job and is also used in instrumental analysis and advanced chemical equilibrium texts and research articles. Job first published his method in 1928, while studying the associations of ions in solution. By plotting the UV absorbance of a solution of Tl(NO3)/NH3 against the mole fraction of Tl(NO3), he produced a graph which provided information about the equilibrium complexes present in solution. (en) O método das variações contínuas ou método de Job é um método usado na química analítica para determinar a estequiometria de um composto (geralmente, um composto de coordenação).Nomeado em homenagem a Paul Job, ele também é usado em análises instrumentais, em livros de equilíbrio químico avançado e em artigos de pesquisa. Job publicou seu método pela primeira vez em 1928, enquanto estudava as associações entre íons em solução. Ao traçar a absorbância no UV de uma solução de versus a fração molar de , ele obteve um gráfico que forneceu informações sobre os complexos em equilíbrio presentes em solução. (pt) Die Jobsche Methode, auch als kontinuierliche Variation bekannt, ist eine Methode, die in der Komplexchemie verwendet wird, um Metall-Liganden-Gleichgewichte zu untersuchen. Dabei werden die Molverhältnisse des Metallkations und der Liganden variiert, die Summe der Konzentrationen bleibt jedoch insgesamt bei jedem Verhältnis gleich. Zur Beobachtung wird beispielsweise die Absorbanz oder die Leitfähigkeit gemessen. Die Metall-Liganden-Komplexstöchiometrie kann aufgrund der Messungen errechnet werden. (de) |
| rdfs:label | Jobsche Methode (de) Job plot (en) Método de Job (pt) |
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