Peak trapping of OSCS provided a route to the on-line concentration of the contaminant, presenting a more concentrated sample for H NMR identification and structural characterization.
In addition, an on-line concentration method of large volume sample stacking was designed.
This observer was implemented on computer for on-line concentration measurements.
On-line concentration strategies, namely pH junction and sweeping, were employed to avoid sample zone diffusion at the interface.
For the UV detection, the temperature and the pH adjustment on-line (concentration of sodium hydroxide and amount of boric acid) were the most critical parameters.
This study aimed to explore the relationship between urinary metabolites and clinical chemotherapy response in breast cancer by CE-MS coupled with on-line concentration.
On-line concentrations of O2, CO, CO2, SO2, NOX and total hydrocarbons (CmHn) were measured in the flue gas during combustion experiments.
High sensitivity detection has been reported with a variety of on-line sample concentration strategies, including electrokinetic stacking with isotachophoresis or field amplification6, or by integrating a specific module in the workflow based on columns or magnetic particles7.
