Analysis of Dissolved Argon, Oxygen, and Nitrogen in Solutions

User Benefits

- Trace amounts of Ar, O₂ and N₂ contained in solutions can be quantified. - Autoinjector measurement is possible in the processes from preparation of calibration curves to measurement of the actual samples. - Low cost analysis is possible by using air as a substitute standard gas.

Introduction

The amount of gas dissolved in a solution controls the functionality of the solution, and in some cases, the gas concentration may affect the stability and reactivity of other solution components. Since the concentration of dissolved gases in solutions is generally on the trace level, the barrier discharge ionization detector (BID) is an effective analysis technique for those gases. However, it is not possible to measure the oxygen (O₂) and nitrogen (N₂) contained in liquids by the headspace method due to their high concentrations in the atmosphere. Although these gases in liquids must be measured directly, it was difficult to prepare calibration curves. Application News (01-00182-EN) introduced a simple calibration curve preparation method for O₂ and N₂ using air as a substitute standard gas. In this article, calibration curves were prepared by that method, and quantitative analyses of argon (Ar), N₂, and O₂ in various organic solvents and water were conducted.

June 15, 2023 GMT