In the NaOH-NaCl-CH2（NH2）COOH medium,the reagent reacts with cethyltrimethylammonium bromide（CTMAB）and cteylpyrid-inium bromide（CPB）to form blue purple complex of component ratio 1∶2.The absorption maximum of t...In the NaOH-NaCl-CH2（NH2）COOH medium,the reagent reacts with cethyltrimethylammonium bromide（CTMAB）and cteylpyrid-inium bromide（CPB）to form blue purple complex of component ratio 1∶2.The absorption maximum of the complex is at 565nm.The range of Beer’s law to be obeyed,apparent molar absorptivity and critical micelle concentration of the cationic surfactants were determined,respectively.展开更多
A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high perform...A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high performance liquid chromatography in a reversed phase mode.The suitable conditions are the methanol-water（80:20,V/V） containing 10mmol/L NaH2PO4-H3PO4 buffer solution（pH=5.0） and 3.0mmol/L sodium dodecyl sulfonate as mobile phase,on a Symmetry C18 column（3.9mmID×150mm）,the flow rate of the mobile phase is 1.0mL/min.Spectrophotometric detection was made at 340nm.The detective limits are 0.05,0.10,2.00 and 0.50ng/mL respectively.The method has good selectivity and sensitivity.It has been applied to the separation and determination of zinc,copper,cobalt and nickel in human hair and tobacco and the result is satisfied.展开更多
文摘In the NaOH-NaCl-CH2（NH2）COOH medium,the reagent reacts with cethyltrimethylammonium bromide（CTMAB）and cteylpyrid-inium bromide（CPB）to form blue purple complex of component ratio 1∶2.The absorption maximum of the complex is at 565nm.The range of Beer’s law to be obeyed,apparent molar absorptivity and critical micelle concentration of the cationic surfactants were determined,respectively.
文摘A new method has been developed for separation and determination of zinc,copper,cobalt and nickel based on their colour chelates with 6,6″-dimethyl-4′-phenyl-2,2′:6′,2″-terpyridine（TPY） by ion pair high performance liquid chromatography in a reversed phase mode.The suitable conditions are the methanol-water（80:20,V/V） containing 10mmol/L NaH2PO4-H3PO4 buffer solution（pH=5.0） and 3.0mmol/L sodium dodecyl sulfonate as mobile phase,on a Symmetry C18 column（3.9mmID×150mm）,the flow rate of the mobile phase is 1.0mL/min.Spectrophotometric detection was made at 340nm.The detective limits are 0.05,0.10,2.00 and 0.50ng/mL respectively.The method has good selectivity and sensitivity.It has been applied to the separation and determination of zinc,copper,cobalt and nickel in human hair and tobacco and the result is satisfied.
