Determination of Low Levels of Lead in Beer Using Solid-Phase Extraction and Detection by Flame Atomic Absorption Spectrometry
Figure 1
Diagram of the on-line preconcentration system used in this study. (a) adsorption process and (b) desorption process. V, valve; L, open; D, closed; MC, mini-column containing adsorbent; R, sample or eluent back stream; hatched circle, valve on; white circle, valve off.
