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Chapter 26: Q12P (page 747)

(a) State the purpose of the separator and suppressor in suppressed ion chromatography. For cation chromatography, why is the suppressor an anion-exchange membrane?

Short Answer

Expert verified

The solution to the above questions are:

  1. The suppressed ion chromatography os suitable for anion analysis.
  2. For cation chromatography, the suppressor replaces anions from eluent.

Step by step solution

01

Explanation of suppressed ion chromatography being the suitable for anion analysis:

  • The suppressor causes the reduction in the conductivity of the eluent by an exchange in the sample counter ions and eluent with ions derived by a suppressor.
  • It changes cations to hydrogen ions with higher conductivity→H2O
  • It neutralizes the eluent
  • Ions are separated with ion exchange process via separator column.
02

Step2:For cation Chromatography:

In this case the suppressor is an anion – exchange membrane because the suppressor replaces anions from eluent with hydroxyl ions via anion-exchange membrane

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Most popular questions from this chapter

(a) A particular solution in a particular capillary has an electroosmotic mobility of 1.3×10-8m2/(V×s)atpH2and 8.1 10-8m2/(V×s). How long will it take a neutral solute to travel 52 cm from the injector to the detector if 27 kV is applied across the 62-cm-long capillary tube at pH 2? At pH 12?(b) An analyte anion has an electrophoretic mobility of -1.6×10-8m2/(V×s)How long will it take to reach the detector at pH 2?At pH 12?

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