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Showing 1 to 19 of 19 for “"Atomic absorption spectrophotometer"”.
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Development of a flameless atomic absorption assay for mercury in biological materials and levels of mercury detected in striped bass (Roccus saxatilis) collected in the San Joaquin Delta
… in a closed system directly connected with an atomic absorption spectrophotometer Seven tissues from ten samples of locally obtained Roccus saxatilis (striped bass) were analyzed, and a three-fold elevation of mercury levels in the liver over the levels in the filet noted. See Table XIX for a …
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Mineral content of vegetables grown with organic and mineral fertilizers
… Ca and Mg were determined using the Perkin-Elmer Atomic Absorption Spectrophotometer. Unequal variation between treatments rendered the F test meaningless for many minerals. Where differences were found, they were in favor of chemically fertilized vegetables as often as in favor of those …
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ΜΕΛΕΤΗ ΚΑΤΑΝΟΜΗΣ ΚΑΙ ΕΠΑΝΑΔΙΑΛΥΣΗΣ ΒΑΡΕΩΝ ΜΕΤΑΛΛΩΝ ΣΕ ΝΕΡΑ ΚΑΙ ΙΖΗΜΑΤΑ ΠΟΤΑΜΩΝ ΤΗΣ ΒΟΡΕΙΑΣ ΕΛΛΑΔΑΣ
… CONCENTRATION. HEAVY METALS WERE ANALYSED USING ATOMIC ABSORPTION SPECTROPHOTOMETER WITHFLAME OR ELECTROTHERMAL ATOMIZATION.
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Determination of Selected Heavy Metals in Some Creeks in a Tennessee City.
… creeks within a city in Tennessee using Atomic Absorption Spectrophotometer. Mean concentrations of Ni, Cu, Zn, Cd, Pb, and Fe in the sites examined reveal that they exceed the USEPA recommended limits. High concentrations of Cu (0.130 mg/L), Zn (13.7 mg/L), Ni (0.267 mg/L), and Cd (0.010 …
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Cutaneous mineral loss in preadolescent girls
… The samples were wet ashed and assayed on an Atomic Absorption spectrophotometer. No significant correlation was found between mineral intake and excretion in the forearm sweat. There was no apparent relationship between the environmental temperature and the excretion of minerals in the sweat. …
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Trace Metals in Fish From a Reservoir Receiving Runoff From a Developing Watershed
… wet digestion techniques and analyzed using an atomic absorption spectrophotometer. Average concentration in the edible fillet of all fish sampled for all metals studied were below published action levels. Eleven out of sixty-four bass had levels of lead in the fillet above a US FDA action level …
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Assessment of heavy metal contamination in flooding area case study at Sungai Pahang and Sungai Kelantan
… As, Cu, Cd, Cr, Fe, Pb, Ni, Mn and Hg by using atomic absorption spectrophotometer. It was found that the concentration of heavy metal namely As, Cu, Cd, Cr, Pb, Ni, and Hg in river water, sediment, snail and fish samples in Pahang River were lower than the maximum allowable limits. Moreover, in …
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To Assess the Level of Heavy Metal Pollution in Groundwater in Ilala Dar es salaam
… metals were analyzed in the laboratory by using atomic absorption spectrophotometer (AAS). Results show that pH of groundwater ranged between 7.3±0.04 to 5.2±2, EC ranged between 2470±28 to 256.5±43 (µS/cm). Chromium concentration in water samples from different locations in the study area ranged …
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Utilização De Polímeros à Base De Acrilamida Na Remoção De Cobre De Meio Aquoso
… of the effluent. The filtrate was analyzed by atomic absorption spectrophotometer and the percentage removal of copper ranged from 63 % to 97 %, noting that polymers with higher ionic charge were responsible for the highest percentage of copper extraction. The results of this study showed that …
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Comparing impacts of new cropping systems on biodiversity in traditional rural China
… chromium, nickel, copper, cadmium, and lead) and Atomic Absorption Spectrophotometer (AAS, zinc). The floral biodiversity of four land-use types was recorded following the Braun-Blanquet coverage-abundance method using 0.5×0.5m quadrats. The faunal biodiversity of two representative farmland plots …
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An Investigation of Heavy Metal Pollution Impact on Drinking Water Quality in the Birim River Sub-Basin of Ghana
… samples were analyzed using a Shimadzu AA- 7000 Atomic Absorption Spectrophotometer with deuterium background corrector. The ranges of the heavy metals detected were 0.00 mg/L – 0.15 mg/L, 0.00 mg/L – 1.06 mg/L, 0.002 mg/L – 0.910 mg/L for Cd, Cr, and As respectively, Pb was not detected in all …
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Postglacial paleoecology and effects of European settlement on the environment of Lake Hunger and Lake Lisgar, Southwestern Ontario /
… iron and manganese using a Perkin Elmer 40) Atomic Absorption spectrophotometer. The results . obtained for the 12 elements were expressed as parts per million in dry sediments. It was found that man's influence on the element distribution patterns in the sediments of Lake Lisgar appeared to …
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Studies On Copper Extraction With Hydroxyoxime Extractants For The Design Of Hollow Fibre Membrane Based Extraction Processes
… and the organic phases were monitored by using atomic absorption spectrophotometer.<br/><br/>Two mathematical models (a chemical model and a semi-empirical model) have been developed in this study to predict the equilibrium data of copper sulfate/ hydroxyoxime system. <br/><br/>The chemical …
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Determination of Select Metal Ions in Commercially Available Conventional and Organic Baby Foods.
… diluted, and analyzed for metal content by flame atomic absorption spectroscopy with the regular standard calibration curve and standard addition method. There was little overall difference in metal content between the conventional and organic foods tested.</p>
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Monitoring Metal Containing Particulates Distribution on a College Campus Using Dandelion (<em>Taraxacum officinale</em>) Leaves as Receptors.
… from the long-term atmospheric deposition or absorption of metals from soil a seasonal plant, dandelion, was used to monitor the metal contents. The metals monitored are cadmium, calcium, copper, chromium, iron, lead, and zinc. Fourteen sites were monitored and samples were collected once a …
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The Correlation of the Concentration of Selected Metals Determined in Water and Fish Samples from a Public Pond.
<p>The concentrations of heavy metals (Cd, Cu, Fe, Ni, Pb, Zn) were measured in water, and fish samples caught from the pond at Fishery Park in Unicoi County, TN. The water samples were collected once a week for 8 weeks. The amounts of metals in the muscle tissues, gill, and liver of the two fish …
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Bioaccumalation of metals in mullet from Mhlathuze Estuary and the effect of Cu and Pb on the uptake kinetics,haematology and acid-base balance of Liza dumerelii.
… digestion techniques and using a Varian AA50 atomic absorption spectrophotometer. The study found elevated metal concentrations in the water and sediment samples from the Mhlathuze Estuary. High metal accumulation in water and tissues were found during summer months, which coincided with high …
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Assessing Commercial Organic and Conventionally Grown Vegetables by Monitoring Selected Heavy Metals Found in Them.
… lead, iron, cadmium, and nickel using flame atomic absorption. The concentration range for the heavy metals found are as follows: Zn, 2.04-69.4; Cu, 0.35-15.1; Pb, 0.00-3.99; Cd, 0.00-0.74; Fe, 2.52-319; and Ni, 39.9-53.8 μg/g. It was found that in general, conventional vegetables contain …
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Konya Bozdağ Yaban Hayatı Geliştirme Sahası'ndaki Anadolu Yaban Koyunlarında (Ovis gmelinii anatolica) biyokimyasal kan parametreleri
… of blood minerals were determined by using Atomic Absorption Spectrophotometer. Serum immunoglobulin levels were detected by Elisa kits read on micro plate readers. An autoanalyser was used for all the parameters excluding minerals and immunoglobulins. All the results were recorded on a …