ANALYSIS METHOD AND ANALYZER OF PHOSGENE

PROBLEM TO BE SOLVED: To provide an analysis method and an analyzer of phosgene in gas with high sensitivity by greatly reducing the influence of interfering components in the analysis method of phosgene by a color development method. SOLUTION: The method for analyzing phosgene by a color developmen...

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Bibliographische Detailangaben
Hauptverfasser:	OSAWA NOBUO, NISHIMURA NORITO
Format:	Patent
Sprache:	eng
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide an analysis method and an analyzer of phosgene in gas with high sensitivity by greatly reducing the influence of interfering components in the analysis method of phosgene by a color development method. SOLUTION: The method for analyzing phosgene by a color development method includes a pretreatment process for bringing gas containing phosgene into contact with an acid substance. Preferably, the gas contains a compound and a basic compound having an isocyanate group and the acid substance is a concentrated sulphuric acid or a sulphuric solution. COPYRIGHT: (C)2009,JPO&INPIT