Analytical Sciences

Abstract − Analytical Sciences, 22(1), 57 (2006).

Enhanced Sensitivity in Flow Injection Analysis Using a Long Pathlength Liquid Waveguide Capillary Flow Cell for Spectrophotometric Detection
Jia-Zhong ZHANG
Ocean Chemistry Division, Atlantic Oceanographic and Meteorological Laboratory, National Oceanic and Atmospheric Administration, 4301 Rickenbacker Causeway, Miami, Florida 33149, USA
Incorporation of a liquid waveguide capillary flow cell into a flow injection instrument enhances the sensitivity of flow injection analysis with spectrophotometric detection by two orders of magnitude. Nitrite determination at nM levels has been used to demonstrate the feasibility of this novel technique for trace analysis. Combining the long pathlength spectrophotometry with flow injection analysis, this technique has advantages of low detection limit, good precision and high sample throughput.