• Home
  • Search Results
  • Separation of alkali metals using isotachophoresis with cryptand 222 as a leading electrolyte additive.

Separation of alkali metals using isotachophoresis with cryptand 222 as a leading electrolyte additive.

Journal of chromatography. A (2012-09-20)
Jeff E Prest, Peter R Fielden, Yanhua Qi
ABSTRACT

This work shows how the inclusion of cryptand 222 as a leading electrolyte additive in isotachophoresis affects the electrophoretic mobilities of alkali metal cations. Using isotachophoresis the separation of alkali metals can be difficult due to the similar electrophoretic mobilities of three of the ions: caesium, rubidium and potassium. However, the presence of cryptand 222 in the leading electrolyte retards the mobilities of the caesium, rubidium and potassium to a different extent allowing separations to be made. A novel electrolyte system was formulated which consisted of a leading electrolyte of 10 mM caesium hydroxide, 0.75 mM cryptand 222 buffered to pH 9.4 with glycylglycine and a terminating electrolyte of 10 mM tetrabutylammonium hydroxide. The use of this electrolyte system allowed good separations of mixtures of rubidium, potassium, sodium and lithium to be achieved. The method was also applied to the analysis of edible salt samples.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
4,7,13,16,21,24-Hexaoxa-1,10-diazabicyclo[8.8.8]hexacosane, 98%

Social Media

LinkedIn icon
Twitter icon
Facebook Icon
Instagram Icon

MilliporeSigma

Research. Development. Production.

We are a leading supplier to the global Life Science industry with solutions and services for research, biotechnology development and production, and pharmaceutical drug therapy development and production.

© 2021 Merck KGaA, Darmstadt, Germany and/or its affiliates. All Rights Reserved.

Reproduction of any materials from the site is strictly forbidden without permission.