Selective and sensitive spectrophotometric determination of tetrafluoroborate in waste water after ion-pair extraction using bis[2-(5-chloro-2-pyridylazo)-5-diethylaminophenolato]cobalt(III) as a counter ion

The Analyst ◽  
1993 ◽  
Vol 118 (9) ◽  
pp. 1205 ◽  
Author(s):  
Issei Kasahara ◽  
Satoshi Hosokawa ◽  
Noriko Hata ◽  
Shigeru Taguchi ◽  
Katsumi Goto
Keyword(s):  
Waste Water ◽  
Spectrophotometric Determination ◽  
Ion Pair ◽  
Counter Ion

Determination of Organic Bases by Ion-Pair Extraction Polarography Using Orange II as Counter Ion

1992 ◽  
Vol 57 (11) ◽  
pp. 2272-2278 ◽  
Author(s):  
Václav Koula ◽  
Daria Kučová ◽  
Jiří Gasparič
Keyword(s):  
Model Compound ◽  
Differential Pulse ◽  
Ion Pair ◽  
Differential Pulse Polarography ◽  
Orange Ii ◽  
Organic Bases ◽  
Counter Ion ◽  
Pulse Polarography ◽  
Ammonium Compounds

The combination of ion-pair extraction and differential pulse polarography is shown to be a method suitable for the determination of 10-7 mol l-1 concentrations of organic bases of quaternary ammonium compounds. Orange II (4-[2-hydroxy-1-naphtyl]azobenzenesulfonic acid) was found to be an appropriate polarographically active counter-ion. The proposed method was used for the determination of tetrapentylammonium bromide (as model compound), Septonex ([1-(ethoxycarbonyl)-pentadecyl]trimethylammonium bromide) and codeine.

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