The utility of ion suppression on polymeric stationary phases may be appreciated by considering the separation of the homologous series of aliphatic carboxylic acids. Neither ion exchange nor ion exclusion chromatography yields a complete separation of these species. However, ion suppression coupled with gradient elution and conductivity detection enables the separation of butyric through to stearic acid, as illustrated in Figure 2. The gradient used involved an increase in the percentage of organic modifier in the mobile phase and a decrease in mobile-phase pH. Carboxylic acids more hydrophilic than butyric acid are eluted in a single peak at the column void volume.

Solar Panel Basics

Solar Panel Basics

Global warming is a huge problem which will significantly affect every country in the world. Many people all over the world are trying to do whatever they can to help combat the effects of global warming. One of the ways that people can fight global warming is to reduce their dependence on non-renewable energy sources like oil and petroleum based products.

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