Detection of heavy metals by immunoassay: optimization and validation of a rapid, portable assay for ionic cadmium

Article Abstract:

An immunoassay utilizing a monoclonal antibody that bound tightly to a cadmium, ethylenediaminetetraacetic acid (EDTA) complex, proved capable of detecting heavy metals. Ca(II), Na(II), and K(I), cations commonly found in ambient water samples, did not affect cadmium detection at concentrations near their solubility limit. Cd(II) was efficiently measured in the presence of a 1mM excess of Fe(III), Mg(II), and Pb(II).

Surgical and Medical Instrument Manufacturing, Surgical and medical instruments, Immunoassay Tests NEC, Usage, Immunoassay, Immunologic tests

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Source identification of oil spills based on the isotopic composition of individual components in weathered oil samples

Article Abstract:

Gas chromatography/isotope ratio mass spectrometry (GC/IRMS) proves useful in examining extensively degraded oil spill samples in relation to their non-degraded sources when used with existing techniques such as gas chromatography or gas chromatography/mass spectrometry. Studies have shown that GC/IRMS can be utilized to correlate refined products dominated by n-alkanes in the C10-C20 region.

Mass Spectrometers, Gas Chromatographs, Environmental aspects, Mass spectrometry, Gas chromatography, Oil spills

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Use of near-infrared reflectance spectroscopy in prediction of heavy metals in freshwater sediment by their association with organic matter

Article Abstract:

The determination of heavy metal concentrations in freshwater sediments could be achieved with the use of near-infrared reflectance spectroscopy (NIRS) technique. NIRS was able to analyze sediments from a Precambrian Shield lake in northwestern Ohio yielding chemically-analyzed metal concentrations of cadmium, copper, zinc, lead, nickel, manganese and iron.

Mass Spectrometers & Spectroscopy, Methods, Ontario, Spectrum analysis, Spectroscopy

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