Spectrophotometric determination of trace levels of atmospheric ammonia by conversion into indophenol and extraction with quaternary ammonium salts

Talanta ◽  
1990 ◽  
Vol 37 (11) ◽  
pp. 1063-1065 ◽  
Author(s):  
N YAMAMOTO ◽  
N KASAHARA ◽  
T SHIRAI
Keyword(s):  
Spectrophotometric Determination ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Atmospheric Ammonia

scholarly journals Extraction and spectrophotometric determination of Hg2+ as complex anion HgI3-

1997 ◽  
Vol 22 (0) ◽  
pp. 09-14 ◽  
Author(s):  
Zaida FERNÁNDEZ TERRA ◽  
Rubén DEL TÓRO DÉNIZ ◽  
Humberto VARELA DE MOYA
Keyword(s):  
Molecular Weight ◽  
Metal Complex ◽  
High Molecular Weight ◽  
Spectrophotometric Determination ◽  
Quaternary Ammonium ◽  
Complex Anion ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Beer’S Law

A method has been developed for the extraction and spectrophotometric determination of Hg2+ in a concentration range of 0.2-1.0 mg L-1; following the Lambert-Beer's law using high molecular weight quaternary ammonium salts dissolved in chloroform. The metal complex anion was determined in the extract in the region UV (260 nm).

scholarly journals Determination of Quaternary Ammonium Salts by Sodium Tetraphenylborate

1960 ◽  
Vol 80 (2) ◽  
pp. 153-155 ◽  
Author(s):  
Toyozo Uno ◽  
Koichiro Miyajima ◽  
Hiroaki Tsukatani
Keyword(s):  
Quaternary Ammonium ◽  
Quaternary Ammonium Salts ◽  
Ammonium Salts ◽  
Sodium Tetraphenylborate
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