Interest in the biologic role of trace elements prompted an investigation of their renal excretion. Preliminary qualitative analysis revealed that except for cobalt the entire first transition series of metals, namely, titanium, vanadium, chromium, manganese, iron, nickel and copper, were detectable in most human urines. In addition the heavier transition metals, molybdenum and silver, as well ...

A combination of mineralogical (SEM–EDS, EMPA) and geochemical (redox dynamics, selective extractions) approaches was applied to miningand smelting-impacted sediments from Lake Uru Uru and from the Cala Cala Lagoon, a non-impacted reference site, in the Bolivian Altiplano. The purpose was to assess the factors controlling the post-depositional redistribution (mobilization/sequestration) of trac...

A novel flow injection ion chromatograph (FI-IC) system has been developed to fully automate pretreatment procedures for multi-elemental analysis of trace metals in seawater by inductively coupled plasma mass spectrometer (ICPMS). By combining 10-port, 2 position and 3-way valves in the FI-IC manifold, the system effectively increase sample throughput by simultaneously processing three seawater...

Trace elements are a major area of nutritional status which influence brain functioning and behavior. Recent studies have found significantly abnormal levels of trace nutritive minerals and trace toxic metals in the head hair of children from disadvantaged backgrounds. Utilizing hair element analysis, this study examined 26 trace elements in two groups of young Appalachian children: an economic...

Objective Trace metals are required in minute amounts for normal human growth and physiological function of the body and might play a vital role in the pregnancy and outcome. The study was conducted to assess the role of trace metals zinc (Zn) and copper (Cu) among women with history of spontaneous abortion (SAb Cases) with respect to women without such history (Controls). MaterialsAndMethods A...

A one-step preconcentration method using two columns in series was used to partition trace metals in natural waters into several operationally defined fractions. The water passed through a Chelex-100 cation exchange column to collect dissolved labile trace metals and then through an AG MP-1 macroporous resin column to collect trace metals complexed with natural organic matter. A third fraction ...

As a forward step to understand the metal bioaccumulation in fish species, a study of trace metal speciation of sediment was achieved. Trace metals were measured in sediments and two fish species, Heteropneustes fossilis and Trichogaster fasciata by using inductively coupled plasma mass spectrometer (ICP-MS). Abundance of total trace metals in sediments varied in the following decreasing order:...