Preconcentration of trace elements by sorption.

Preconcentration in Inorganic Trace Analysis

Preconcentration in trace analysis lowers the detection limit, simplifies the treatment of a representatIve sample, facilitates calibration, reduces the need for various standard reference samples and frequently involves separation of the matrix in analysis of toxic, radioactive and expensive materials. In this paper, the types of preconcentration are considered and quantitative characteristics...

Commission on Microchemical Techniques and Trace Analysis Separation and Preconcentration of Trace Substances . I — Preconcentration for Inorganic Trace Analysis

Immunity Enhanced by Trace Elements

Zinc is known to be essential for all highly proliferating cells in the human body, especially the immune system. A variety of in vivo and in vitro effects of zinc on immune cells mainly depend on the zinc concentration. All kinds of immune cells show decreased function after zinc depletion. In monocytes, all functions are impaired, whereas in natural killer cells, cytotoxicity is decreased, an...

Sampling and Preconcentration for Trace Explosives Detection

A trace explosives detection system typically contains three subsystems: sample collection, preconcentration, and detection. Sample collection of trace explosives (vapor and particulate) through large volumes of airflow helps reduce sampling time while increasing the amount of dilute sample collected. Preconcentration of the collected sample before introduction into the detector improves the se...

Trace elements.