Flow injection dispersion characteristics with inductively coupled plasma atomic emission spectrometry. Part 1. Methodology

Abstract

A flow injection (FI) dispersion study was conducted with inductively coupled plasma atomic emission spectrometric detection. Both the dispersion height and width behaviours were characterized. The dispersion time periods measured at 61 and 10% of the transient height (σ^0.61, Δt^0.1, t^f and t^r) successfully represented the dispersion width behaviour. The transient front and rear section slopes assumed a logarithmic dependence of the instantaneous emission signal with time. However, the slopes were sometimes non-linear. Deviations from conventional behaviour of the dispersion heights and widths for FI parameters were observed, and differences between normal and reverse FI modes occurred at low flow rates and/or large reactor volumes.