摘要:

Displacement chromatography is a way of using the chromatographic technique, in which the solutes are separated in bands in the stationary phase. Because the stationary phase is a liquid in CCC, it possible to stop the displacement process when the separated bands are still in the stationary phase. The collection of the stationary phase bands is possible. This way of using a CCC instrument was described for the separation of transition metal ions. Co2+, Ni2+, Cu2+, and Zn2+were separated using diethylhexyl phosphoric acid (DEHPA) and heptane as the stationary phase through a reversed micelle extraction process.

ISSN:1082-6076    

DOI:10.1080/10826079808001952

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

摘要:

Application of high-speed countercurrent chromatography (HSCCC) to the concentration of metal ions has been studied. The stationary phase, containing di(2-ethylhexyl) phosphoric acid (DEHPA) in n-heptane, was continuously fed into the column. The ppb level of metal ions in a 500 mL of the mobile phase was continuously concentrated into small volumes of the stationary phase retained in the column. Concentrated metal ions were eluted with nitric acid and determined by the emission intensity with a direct current plasma atomic emission spectrometer (DCP-AES). The recoveries of Ca, Cd, Mg, Mn, Pb and Zn ranged over 88% at a concentration of 10 ppb each in 500 mL of the sample solution. Versatility of the present method was further demonstrated in determination of trace metals in tap water and deionized water.

ISSN:1082-6076    

DOI:10.1080/10826079808001953

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001954

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001955

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001956

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001957

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001958

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor

ISSN:1082-6076    

DOI:10.1080/10826079808001931

出版商:Taylor & Francis Group    

年代:1998

数据来源: Taylor