Conductivity detection in capillary electrophoresis--a powerful tool in ion analysis.
Conductivity detection in CE has recently become available in a commercial CE instrument. The new conductivity cell is based on an end-capillary concept. The conductivity sensor and the detection end of the fused-silica capillary are permanently encapsulated in two individually modified coupling connectors (ConTip, ConCap [both from Orion Research, Boston, MA, U.S.A.]). This open-architecture cell permits interchangeability of sensors and capillaries, while maintaining a precisely defined detection volume between those two components when inserted into the detector cell block. The detector's performance is evaluated for sensitivity, linearity, and reproducibility using low-mobility electrolytes. Electropherograms comprising a variety of ionic class separations including inorganic and organic anions, organic surfactants, alkali metals, alkaline earths, transition metals, and organic amines are shown along with separations of actual samples.
Haber
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Orion Research, a Subsidiary of Thermedics, Inc., a Thermo Electron Company, Boston, MA, USA.
Jones
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Soglia
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Surve
M A
MA
McGlynn
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M
Caplan
A
A
Reineck
J R
JR
Krstanovic
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D002412:Cations / Q000032:analysis*; D004553:Electric Conductivity; D004563:Electrochemistry / Q000295:instrumentation / Q000379:methods; D019075:Electrophoresis, Capillary / Q000295:instrumentation / Q000379:methods*; D007202:Indicators and Reagents; D008670:Metals / Q000032:analysis*; D012680:Sensitivity and Specificity; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D014815:Vitamins / Q000032:analysis*
D002412:Cations; D007202:Indicators and Reagents; D008670:Metals; D014815:Vitamins