Research On Analytical Methods Of Heavy Metal Elements In Soil

Heavy metal elements are a sort of important environmental pollutants, themain factor is not only they can’t be degraded by microorganism as organicpollutants, but also they are absorbed and transformed into metal-organiccompounds, more toxic they are. Recent research reflects the history ofmodifications which have occurred in the environment surrounding humans andliving organisms. Environmental pollution has arisen mostly with thedevelopment of modern technologies and consequently, the diseases related topollution have increased. Their representation constitutes a valid instrument toestablish a correct analytical method and to find interactions between heavymetal elements’ distribution in rocks, soils, and water and heath of humans andother living organisms.The objective of this work, in particular, is to provide different analyticalmethods to determine As, Hg, Cr, Cd, Pb in angricultural soil samples by atomicfluorescence spectrometry (AFS), inductively coupled plasma massspectrometry (ICP-MS), X-ray fluorescence spectrometry (XRF). Someimprovement and further optimization for the sample pretreatment conditions,include decomposition method, requirement, are discussed and severalsettlement measures were also proposed. Meanwhile, the method qualityparameters, such as detection limit, linear ranges, precision, accuracy, recovery,interference, are also provided. The precisions of the methods are found to be inreasonable agreement with analytical request. The methods have been applied tothe national standard soil samples with satisfactory results. In the end, differentmethod combinations are provided. It has been shown that they both have greatpotential for the determination of heavy metal elements in agricultural soilsamples.