VERFAHREN ZUR KOLORIMETRISCHEN MESSUNG VON ZINK

Disclosed herein is a high sensitivity method of colorimetrically measuring zinc by using a 2-pyridylazoaminophenol derivative represented by the following general formula (I) or a salt thereof as a coloring reagent, wherein a masking agent excellent in stability and acting specifically upon specifi...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	YAMAZATO, FUJIO, TOKUDA, KUNIAKI
Format:	Patent
Sprache:	eng ; ger
Schlagworte:	INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING PHYSICS TESTING
Online-Zugang:	Volltext bestellen
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Beschreibung
Zusammenfassung:	Disclosed herein is a high sensitivity method of colorimetrically measuring zinc by using a 2-pyridylazoaminophenol derivative represented by the following general formula (I) or a salt thereof as a coloring reagent, wherein a masking agent excellent in stability and acting specifically upon specific metals is used. As the masking agent is used a surface active agent. wherein X and Y represent a halogen atom or a hydrogen atom. R represents a hydrogen atom or a lower alkyl group, and R and R represent a hydrogen atom, a lower alkyl group, -(CH2)nSO3H in which n is an integer of 1-4, or -(CH2) l -@@-(CH2)mSO3H in which l is an integer of 0-4 and m is an integer of 0-4. The masking agent may be surface active agent in combination with dimethylglyoxime in case of masking nickel and/or cobalt.