Metal concentrations and tissues distribution in larvae ofChironomus with reference to x-ray microprobe analysis

Atomic absorption, scanning electron microscopy and x-ray microprobe analysis were used to examine metal accumulation and localization in larval chironomids collected from two sites that differed in their extent of contamination. Lead, Fe, Cd, Cu, Ni, Zn, and occasionally, Al were detected in the midgut and anal papillae of chironomids, with the greatest frequency of detection occurring in the midgut of larvae collected from the more heavily …