scholarly journals Inorganic Elemental Composition of Wood of Ficus Religiosa L. (Peepal)

2012 ◽  
Vol 27 ◽  
pp. 74-77
Author(s):  
Roshani M. Shrestha ◽  
Deependra S. Dhami
Keyword(s):  
Atomic Absorption ◽  
Elemental Composition ◽  
Ash Content ◽  
Inorganic Elements ◽  
Ficus Religiosa ◽  
Elemental Compositions ◽  
Aas Method ◽  
High Concentrations

The total ash content and inorganic elemental compositions of the wood of Ficus religiosa L. from Nepal had been studied. The percentage of total ash content were found highest in comparison to other Ficus species. Different eight inorganic elements were detected from wet ash analysis by atomic absorption spectroscopic ( AAS) method. The remarkably high concentrations of K, Ca and Mg were also reported.DOI: http://dx.doi.org/10.3126/jncs.v27i1.6664 J. Nepal Chem. Soc., Vol. 27, 2011 74-77 

scholarly journals Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods

2011 ◽  
Vol 8 (1) ◽  
pp. 263-267
Author(s):  
Baghdad Science Journal
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flameless Atomic Absorption ◽  
Flame Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Low Concentrations ◽  
Wet Ashing ◽  
High Concentrations

Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods were showed, using wet ashing method. This work was done on Negella sativa because of wide using of this plant in many formulations ( in food or medicine ).two types of atomic absorptions were used : first, flame atomic absorption spectroscopy, for minerals of high concentrations such as, Na, Mg, K, Fe, Ca, Li, Ni, Zn, Mn, Cu. Second, flameless atomic absorption spectroscopy, for minerals of low concentrations such as, Al, Si, V, B, Pb, Co, Cd, Cr ,Si, Hg, Sn .The results showed the existence of many minerals in Negella sativa useful to human sanity with acceptable dietary allowance. On other side, the presence of harmful minerals to human sanity(Pb, Cd, Hg ) were negligible.

Varietal differences in in vitro dry matter digestibility in Setaria, and the effects of site, age, and season

1972 ◽  
Vol 23 (6) ◽  
pp. 959 ◽  
Author(s):  
JB Hacker ◽  
DJ Minson
Keyword(s):  
Nitrogen Content ◽  
Dry Matter ◽  
Ash Content ◽  
High Potassium ◽  
Dry Matter Digestibility ◽  
Flowering Behaviour ◽  
High Concentrations ◽  
Ranking Order ◽  
Cutting Regimes

Six Setaria introductions were grown in small plots at three sites differing in soil type and location in south-eastern Queensland, and fertilizer and irrigation water were applied at similar rates. All plots of each introduction were genetically identical. Three different cutting regimes were imposed, such that at 12-week intervals during the 2 years of the experiment 4, 8, and 12-week regrowth was available for comparison of in vitro dry matter digestibility. There was an overall difference in digestibility between varieties of 6.6 percentage units, and the ranking order was usually the same for all sites, seasons, and ages of regrowth. Three of the introductions were consistently superior to cv. Nandi, the only commercial cultivar included in the present study. The two Setaria splendida introductions ranked second and sixth, although they were both higher in ash concentration than the other introductions, and this was associated with high potassium content. Differences between varieties in digestibility were not associated with flowering differences, despite large differences in flowering behaviour. The maximum mean difference between sites was 4.9 units and this was associated with differences in ash content. Difference in ash content, however, accounted for only 23% of the digestibility difference. The high ash content was associated with high concentrations of potassium. There was no association between nitrogen content and digestibility. The introduction lowest in digestibility had the highest nitrogen content. Digestibility was higher in winter than in summer at all sites, and the extent of this difference increased with age of regrowth. Higher digestibilities were obtained in younger regrowth.

Finding of artisanal uses of elemental mercury in the city of Murcia in medieval times

2021 ◽  
Author(s):  
José María Esbrí ◽  
Luis Mansilla-Plaza ◽  
María Jesús Sanchez-Gonzalez ◽  
Pablo Higueras
Keyword(s):  
Atomic Absorption ◽  
Elemental Mercury ◽  
Absorption Spectrometry ◽  
Speciation Analysis ◽  
Outer Wall ◽  
High Concentration ◽  
Entire Area ◽  
High Concentrations ◽  
Under Construction ◽  
The City

<p>Mercury (Hg) was used in gilding techniques since ancient times. This metal gilding technique consisted of applying an amalgam of Au and Hg to the surface of a metallic object and then removing the Hg to achieve adhesion of the Au to the support. The traditional preparation of amalgam was a mixture of Au with Hg (in a ratio of 1/8). After this preparation, the mixture usually was ground in a mortar, heated, and then cooled by pouring it into water. The paste was applied to the areas to be browned and then the piece was subjected to mild temperatures so that the Hg evaporated, leaving a thin layer of Au on the surface of the object.</p><p>The origin of this work is the discovery of an evident quantity of liquid Hg on a site under construction, near the old wall of the city of Murcia, at a level identified as from medieval times. To elucidate the origin of this Hg, a sampling of medieval materials has been carried out throughout the site, including both the area with liquid Hg, the entire area what appears to be the work room and the adjacent rooms. The sampling has been carried out using an Ejkelkamp sampler at various depths. These soil samples were analysed by Energy Dispersion X-Ray Fluorescence using a PanAlytical device. Total Hg and Hg speciation data were obtained by Atomic Absorption Spectrometry using a Lumex equipment. In addition to this, a gaseous mercury monitoring has been carried out using a portable atomic absorption equipment to search Hg sources and gaseous Hg dispersion in the atmosphere of the studied site. Results of the survey has shown an evident and intense soil Hg pollution in a small area of 2x2 m. This affected area was located near the outer wall of the medieval building and was very restricted, which suggests that it was a storage place for liquid Hg for later use in other areas. The degassing of these recently uncovered materials produced a significant dispersion of the Hg gas throughout the enclosure. In addition to this, samples of medieval materials have shown very high concentrations of Hg in the vicinity of the contaminated area, and high concentrations in the rest of the enclosure. Speciation analysis have shown that the Hg in this part of the enclosure is in the form of metacinnabar and Hg bound to humic acids, which suggests the presence of an atmosphere with extremely high concentration of gaseous Hg in medieval times that was later deposited in the soil, being fixed to its organic phase. Multielemental analysis has shown additional high concentrations of Pb, Cu and Sn, suggesting that the artisanal works in the enclosure involved these elements too. While waiting for more specific archaeology works that can corroborate it, the origin of this Hg in the area could be the storage for the realization of gilding work on metals with this element.</p><p>This work was funded by the company “Obras y Proyectos Soyma”.</p>

Determination of Molybdenum in Fertilizers by Atomic Absorption Spectrophotometry

1967 ◽  
Vol 50 (6) ◽  
pp. 1269-1273
Author(s):  
William L Hoover ◽  
Sonja C Dtjren
Keyword(s):  
Atomic Absorption ◽  
Isoamyl Alcohol ◽  
Potassium Thiocyanate ◽  
Atomic Absorption Spectrophotometry ◽  
Water Soluble ◽  
Complexing Agent ◽  
Alcohol Fraction ◽  
Low Levels ◽  
High Concentrations

Abstract A procedure for determining low levels of molybdenum in fertilizers by atomic absorption is proposed. With potassium thiocyanate as complexing agent, molybdenum is extracted in an isoamyl alcohol fraction to separate the fraction containing molybdenum from the water-soluble fraction containing materials that would interfere in the atomic absorption procedure. However, the procedure cannot be used with samples that have high concentrations of iron. Tests on the recovery of molybdenum in four fertilizers indicate that the procedure is reliable to levels as low as 2.5 ppm of molybdenum

scholarly journals Effects of organic compounds on the macroalgae culture of Aegagropila linnaei

2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Beata Messyasz ◽  
Boguslawa Leska ◽  
Joanna Fabrowska ◽  
Marta Pikosz ◽  
Adam Cieslak ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Amino Acid ◽  
Organic Compounds ◽  
Amino Acid Content ◽  
Test System ◽  
Ash Content ◽  
Biomass Composition ◽  
Amino Acids Composition ◽  
High Concentrations ◽  
The Impact

AbstractThe effects of the impact of four organic compounds (ascorbic acid, biotin, glucose and sucrose) on ash, protein, fiber, fat and amino acid contents in the freshwater Aegagropila linnaei biomass were examined in 7 and 14 days of cultivations in high concentrations of tested compounds (100 mg L-1). The presence of examined organic compounds had a negligible effect on the development of algae and their biomass composition. There were no significant differences in the amino acids composition in the biomass in the presence of organic compounds compared to the test system. However, the increase in ash content was observed irrespective of the cultivation time in the case of all used organic compounds. Only slight differences in crude fat concentration were observed in the case of 7 days cultivation with ascorbic acid, biotin and sucrose, while the highest increase of ash content was observed after 14 days of supplementation with glucose. None of the compounds affected changes in amino acid content in the Aegagropila linnaei biomass. The results suggest that an environment enriched with the test organic compounds had only minimal, or at most short-term, effects on the algal biomass composition.

Atomic Absorption Spectrophotometric Method for Determination of Water-Soluble Copper in Water-Insoluble Copper Fungicides: CIPAC Collaborative Study. Comparison with Bathocuproine Method

1981 ◽  
Vol 64 (1) ◽  
pp. 75-78
Author(s):  
F Sánchez Rasero ◽  
◽  
P G Balayannis ◽  
H P Beyers ◽  
E Celma ◽  
...  
Keyword(s):  
Atomic Absorption ◽  
Collaborative Study ◽  
The United States ◽  
Atomic Absorption Spectrophotometry ◽  
Water Soluble ◽  
Absorption Spectrophotometry ◽  
Aas Method ◽  
Standard Deviations ◽  
The Difference

Abstract An atomic absorption spectrophotometric (AAS) method was collaboratively studied by 8 laboratories from Africa, the United States, Australia, and Europe. The samples were dispersed in deionized water. After centrifuging and filtering, the water-soluble copper in the filtrate was acidified and measured by atomic absorption spectrophotometry, in an airacetylene flame, at 324.7 nm. The results from 7 laboratories were satisfactory and no unfavorable comments were received. Repeatability standard deviations ranged from 0.005 to 0.023, and reproducibility standard deviations ranged from 0.012 to 0.062. When compared with the bathocuproine method, the difference in bias between both methods is not significant. They were both adopted as full CIPAC methods, with the bathocuproine method as the referee method. Both methods have been adopted official first action.

Determination of Arsenic and Selenium in Whole Fish by Continuous-Flow Hydride Generation Atomic Absorption Spectrophotometry

1989 ◽  
Vol 72 (3) ◽  
pp. 484-486
Author(s):  
William G Brumbaugh ◽  
Michael J Walther
Keyword(s):  
Atomic Absorption ◽  
Continuous Flow ◽  
Hydride Generation ◽  
Atomic Absorption Spectrophotometry ◽  
Atomic Absorption Determination ◽  
Absorption Determination ◽  
Relative Standard ◽  
Wet Chemical ◽  
High Concentrations

Abstract A combined wet chemical and dry ash digestion and use of a continuous- flow hydride generator coupled with a flame-heated quartz cell enabled the simple, precise, and highly automated atomic absorption determination of arsenic and selenium in tissues of whole fish. Percent relative standard deviation averaged 4% for each element; method detection limits (μg/g dry wt) were about 0.06 for arsenic and 0.04 for selenium. Digestion of samples proceeded with little operator attention and without perchloric acid. Analysis for arsenic as As(V) simplified sample preparation but care had to be exercised to avoid interferences from high concentrations of selenium.

Sign in / Sign up

Export Citation Format

Share Document