the complex [ zn ( par ) ( 2 ) ] ( cdba ) ( 2 ) , where par is the 4- ( 2-pyridylazo ) resorcinol anion and cdba is cetyldimethylbenzylammonium ion , is extracted from a solution buffered at ph 9.7 with carbonate/bicarbonate .
C0007026
carbonate
C0005367
bicarbonate