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Showing 1 to 11 of 11 for “"Trace metal analysis"”.
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Development Of Single And Array Electro-Chemical Sensors For Real-Time Trace Metal Analysis In Aqueous Environmental Media
<p>Detection of trace metals has great importance in environmental and biological applications. While traditional electrochemical techniques have played critical roles in this field, their usefulness is limited by temporal resolution, Hg toxicity and stability concerns. Recently, we developed a …
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Techniques for monitoring human exposure to airborne trace metals
… for monitoring human exposure to airborne trace elements in urban atmospheres using trace metal analysis of human hair.
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An Inductively Coupled Plasma Atomic Emission Spectrometer for the Detection of Nonmetals in the Vacuum Ultraviolet
… spectroscopic technique for the determination of metals in a plethora of sample types. The bulk of the interest has been placed on trace metal analysis, and the analysis of nonmetals has been gaining increased interest since the 1980's. In this work, an inductively coupled plasma atomic emission …
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DETERMINATION OF TRACE METALS BY lON-CHROMATOGRAPHY WITH CHEMILUMINESCENCE DETECTION
… that the detection step for the determination of trace metals by liquid-chromatographic systems is the weakest area of the analytical procedure. Various post-column reagent systems, for trace metal analysis, based on the highly sensitive luminol-peroxide chemiluminescence (CL) reaction have been …
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Nanocomposite-graphene based platform for heavy metal detection
… electrode was used as a sensing platform for trace metal analysis in 0.1 M acetate buffer (pH 4.6) at 120 s deposition time, using square-wave anodic stripping voltammetry (SWASV). Detection limits were calculated using 3σblank/slope. For practical applications recovery studies was done by …
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Pulse microwave mediated sample clean-up method to analyse trace metals, PCBs and pesticides, and for treatment of organic wastes
… is digested in acid. This step must precede trace metal analysis by atomic absorption spectroscopy. Conventional wet ashing procedure using hot plate takes several hours. Digestion of animal and plant tissues by 5.0 ml, 10.0 ml or 20.0 ml of $\rm H\sb2SO\sb4$ (95.0-98%)/HNO$\sb3$ (69-71%) …
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A method for determining elements for elemental signature analysis of groundwater and treated Lake Mead water
Elemental signature analysis (ESA) is a term that describes the use of the presence/absence or relative abundance of elements in samples. Several studies have been performed on the identification of these elemental signatures or fingerprints of water using inductively coupled plasma mass …
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Development of HPLC Techniques for the Analysis of Trace Metal Species in the Primary Coolant of a Pressurised Water Reactor
… of 10pg ml-li s discussed. A review of trace and ultra-trace metal analysis, relevant to the specific requirements imposed by primary coolant chemistry, indicated that high performance liquid chromatography (HPLC), coupled with preconcentration of sample was an ideal technique. A HPLC …
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Analysis of Effects of Urbanization on Spring Geochemistry and Sediment for a Karst Aquifer in Valley Creek Basin, Chester County, Pennsylvania
… of sediment entering the system. Furthermore, trace metal analysis of baseflow water samples and spring mouth sediment showed low concentrations. The metal concentrations in the water samples were generally less than 10 ppb and below EPA drinking water standards. The metal concentrations in the …
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IN-SITU PRECONCENTRATION OF TRACE METALS IN NATURAL WATERS AND BRINES WITH ANALYSIS BY FLOW INJECTION ATOMIC SPECTROMETRY
… sensitivity and multi-element capability for trace metal analysis but the formation of polyatomic ions (particularly below m/z = 80) can cause serious interferences. Such interfering species may be introduced via precursor atoms in atmospheric gases, the sample matrix or impurities in the …
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The Speciation of Dissolved Uranium in Marine Waters
… some form of preconcentration is required for analysis. The two most widely used pre-concentration schemes are co-precipitation with iron hydroxide, and chelating ion exchange chromatography. These methods were developed by following the behavior of inorganic uranium isotopes and seemed to give …