Elemental Analysis Scholarly Articles and Papers

Antimicrobial activity and Elemental analysis of Cassia siberiana leaves Using Atomic Absorption Spectrometer

by Olajide Olutayo, Afolayan Michael, Adewusi Adepoju John, Adeyanju Olusola

ABSTRACT:

"Phytochemical screening and elemental analysis was carried out on water and ethanol extract of Cassia siberiana leaves.[...]Elemental analysis revealed the presence of calcium (Ca), phosphorus (P), Magnesium (Mg), Manganese (Mn), Iron (Fe), Copper (Cu) and Zinc (Zn). Manganese was present at the higher concentration of 9.50ìg/g followed by Zinc 2.4ìg/g.

Elemental Analysis Pioneer Dr. Fritz Pregl
EXCERPT:

Elemental Determination
"Five grams (5 g) of oven dried samples were weighed into a crucible. The crucible was then placed in a hot furnace and ashed at 600 OC for 3 h. The furnace was cooled to about 120 OC. the crucible was then removed and placed in a desiccator for 1 h to cool before weighing. The process was repeated until a constant weight was obtained. The ashed samples (0.5 g) were weighed and transferred into the digestion tube. 5 ml each of distilled water, concentrated trioxonitrate (V) acid (HNO3) and perchloric acid (HCIO4) were added and the content mixed. The tubes were placed into the digestion block inside a fume cupboard and the temperature

FULL TEXT:

Scholars Research Library: Elemental Analysis of Cassia siberiana


Elemental Analysis of Soil Around Ikot Abasi Aluminum Smelter Plant, Nigeria By Instrumental Neutron Activation Analysis (INAA)

by A. A. Essiett, E. J. Uwah+ and S. O. Uwak++

ABSTRACT:ABSTRACT:


"Concentration of major, minor and trace elements in soil samples around Ikot Abasi Aluminum Smelter Company of Nigeria (ALSCON) Ikot Abasi, Nigeria were determined by Instrumental Neutron Activation Analysis (INAA) technique using thermal neutron from Nigeria Nuclear Research Reactor (NIRR-1) at Center for Energy Research and Training (CERT), Ahmadu Bello University Zaria. By this analysis, 25 elements were determined in the soil around Ikot Abasi Aluminum Smelter Plant the element include Cr, Yb, Cs, Sb, Fe, Sm, Dy, Pa, As etc. The results show that INAA of soil samples around the studied area gave maximum values of 9.99 ± 0.41 ppm for As; 9.54 ± 1.06ppm for Sb; 7.725 ± 1.53ppm for Lu; 4.28 ± 0.81ppm for Fe and 3.24 ± 0.18ppm for Cr.

EXCERPT:ABSTRACT:

"...Air pollution and water pollution can have inimical effect to soil thereby altering its elemental composition. Thus soil is the mother of the universe, and must be given a first treatment. Elemental analysis of soil particles has become important, because of the effects of these particles on the environment and health. It has also been observed that elemental association with natural sources, such as soil and ocean are usually found with the coarse particulate, while elements emitted from anthropogenic sources are associated with the fine particulate]. Anthropogenic sources have also be found to be responsible for the concentration of trace metals in tree barks.

FULL TEXT:ABSTRACT:

Scholars Research Library: Elemental Analysis of Soil Around Ikot Abasi Aluminum Smelter Plant, Nigeria By Instrumental Neutron Activation Analysis


Chemical Analysis and Risk Assessment of Diethyl Phthalate in Alcoholic Beverages with Special Regard to Unrecorded Alcohol

by Jenny Leitz, Thomas Kuballa, Jürgen Rehm, Dirk W. Lachenmeier

ABSTRACT:

"Public health concerns of phthalates include carcinogenic, teratogenic, hepatotoxic and endocrine effects. The aim of this study was to develop and validate a method for determining phthalates in alcohol samples and to provide a risk assessment for consumers of such products."

EXCERPT:

"...In the context of our ongoing investigation of unrecorded alcohol from different countries, the aim of this study was to develop and validate a method for the determination of phthalates in alcoholic beverages. Especially the sample preparation should be as fast and inexpensive as possible, which is why we aimed to use a simple solvent extraction of the alcohols. Different parameters of this liquid-liquid extraction (LLE) method had to be optimized, including selection of the extraction solvent, the ratio extraction solvent volume/sample volume or the number of extraction repetitions. The results from our large collection of samples of unrecorded alcohols were used to provide a toxicological evaluation of these types of alcohols for consumers.

FULL TEXT:

Public Library Of Science: Elemental Analysis and Risk Assessment of Diethyl Phthalate in Alcoholic Beverages


Elemental Analysis of Kerogens (C, H, N, O S, Fe)

by B. Durand, J.C. Monin

ABSTRACT:

"An increasing amount of work has since been carried out for elemental analysis of kerogens [...]. The work shows that this simple method is capabe of establishing a classification of kerogens according to heir ability to generate oil and gas in depth {...]."

EXCERPT:

"...The methods are inspired yb the procedures of functional analysis of coal, the classical methods of analysis such as titration, gas volumetry and elemental analysis being replaced here by recording the infrared spectra...

FULL TEXT:

Google Books: Elemental Analysis Of Kerogens


Rapid Microwave Digestion Procedures for the Elemental Analysis of Alloy and Slag Samples of Smelted Ocean Bed Polymetallic Nodules

by Kumari Smita, Saurabh Kumar Singh, and Brajesh Kumar

Journal of Chemistry, vol. 2013, Article ID 151395, 6 pages, 2013. doi:10.1155/2013/151395

ABSTRACT:

"The use of microwave digester for digestion of alloy and slag samples of smelted ocean bed polymetallic nodules has permitted the complete digestion of samples, thereby replacing the tedious classical methods of digestion of samples. Digested sample solutions were analyzed for concentrations of various radicals and the effectiveness of the developed digestion methodology was tested using certified reference materials. It was found that the developed method is giving results comparable with that obtained from conventionally digested samples. In this digestion procedure, time required for digestion of samples was reduced to about 1 hour only from 8-9 hours of conventional digestion."

EXCERPT:

"...Sample digestion in pressurized TFM vessel using microwave heating proved to be a very rapid method for the complete digestion of alloy and slag samples of smelted manganese nodules as it drastically reduces the time and reagent requirements of digestion [...] The developed protocol was validated using CRM. The use of perchloric acid at high temperature and high pressure is hazardous due to its potentially explosive nature and hence the requirement of perchloric acid is completely eliminated in our digestion methodology.

FULL TEXT:

Journal of Chemistry, vol 2013: Rapid Microwave Digestion Procedures for the Elemental Analysis of Alloy and Slag Samples


Preliminary phytochemical and mineral analyses of the root of Hippocratea welwitschii

by OKOH-ESENE, R.U, OKOGUN J.I., OKWUTE S.K. and THOMAS S.A.

Archives of Applied Science Research, 2012, 4 (1):315-322

ABSTRACT:

"The root of the plant Hippocratea welwitschii has been used by the natives in Akwa Ibom State for the treatment of epilepsy. Phytochemical tests on the powdered root sample using standard methods of analysis showed that it contained saponins, alkaloids, phenols and glycosides. Elemental analysis of the root for chromium, calcium, magnesium, copper, manganese zinc, iron, lead, cadmium, cobalt, nickel and selenium showed the following values (0.0611, 0.2176, 0.7741, 0.0110, 0.3010, 0.0406, 0.0833,.0.0833, 0.0681, 0.1970, 0.1487, 0.239 and 0.162) mg/g"

EXCERPT:

"...These [Saponins] compounds serve as natural antibiotics, which help the body to fight infections and microbial invasion. Plant saponins generally help humans to fight fungal infections, combat microbes and viruses and knock out some tumor cells, particularly lung and blood cancers(Barakat et al 1993; Poornima and Ravishankar,2009).They also bind blood cholesterol, thereby reducing heart problems but the most exciting and outstanding prospect for saponins are how they inhibit and kill cancer cells...

FULL TEXT:

Scholars Research Library: Preliminary phytochemical and mineral analyses of the root ofHippocratea welwitschii.


Fast Pyrolysis Of Corm Residues For Energy Production.

By Stephen Danje)

Stellenbosch University

ABSTRACT:

"Thermochemical conversion processes such as pyrolysis is a topic of interest for conversion of cheap agricultural wastes into clean energy and valuable products. Fast pyrolysis of biomass is one of the promising technologies for converting biomass into liquid fuels and regarded as a promising feedstock to replace petroleum fuels."

EXCERPT:

"...Bio-oils elemental analysis of carbon (C), hydrogen (H) and nitrogen (N) is recommended to be carried out according to ASTM D 5291 by an elemental analyser (Scholze, 2002; Oasmaa et al., 1997). In this method, the elements are simultaneously determined as gaseous products (carbon dioxide, water vapour and nitrogen). The elemental analysis accuracy of C and H in wood pyrolysis is good, but poor for N.....

FULL TEXT:

Stellenbosch University: Fast Pyrolysis Of Corm Residues For Energy Production.


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