Determination of trace elements in organic material by the oxygen bomb method

1968 ◽  
Vol 40 (13) ◽  
pp. 2031-2033 ◽  
Author(s):  
Shizuo. Fujiwara ◽  
Hisatake. Narasaki
Keyword(s):  
Trace Elements ◽  
Organic Material ◽  
Oxygen Bomb ◽  
Bomb Method

scholarly journals Spectrophotometric determination of chlorine by the “oxygen bomb” method

1974 ◽  
Vol 23 (2) ◽  
pp. 172-175 ◽  
Author(s):  
Hisatake NARASAKI ◽  
Kazuo TAKAHASHI
Keyword(s):  
Spectrophotometric Determination ◽  
Oxygen Bomb ◽  
Bomb Method

scholarly journals Spectrophotometric determination of phosphorus by the "oxygen bomb" method

1973 ◽  
Vol 22 (5) ◽  
pp. 541-546 ◽  
Author(s):  
Hisatake NARASAKI ◽  
Kiyoshi MIYAJI ◽  
Akiyuki UNNO
Keyword(s):  
Spectrophotometric Determination ◽  
Oxygen Bomb ◽  
Bomb Method

scholarly journals The Mathematical Modeling of Ca And Fe Distribution In Peat Layers

2015 ◽  
Vol 2 ◽  
pp. 40
Author(s):  
Ērika Teirumnieka ◽  
Ilmārs Kangro ◽  
Edmunds Teirumnieks ◽  
Harijs Kalis ◽  
Aigars Gedroics
Keyword(s):  
Mathematical Modeling ◽  
Experimental Data ◽  
Mathematical Model ◽  
Trace Elements ◽  
Mathematical Models ◽  
Organic Material ◽  
Low Concentrations ◽  
The Mathematical Model ◽  
Research Show

Bogs have been formed by an accumulation of peat - a light brown-to-black organic material, built up from partial decomposition of mosses and other bryophytes, sedges, grasses, shrubs, or trees under waterlogged conditions. The total peatlands area in Latvia covers 698 918 ha or 10.7% of the entire territory. Knowledge’s of peat metals content are important for any kind of peat using. Experimental determination of metals in peat is very long and expensive work. Using experimental data mathematical model for calculation of concentrations of metals in different points for different layers can help to very easy and fast to find approximately concentration of metals or trace elements. The results of the research show that concentrations of trace elements in peat are generally low. Concentrations differ between the superficial, middle and bottom peat layers, but the significance decreases depending on the type of mire. The mathematical model for calculation of concentration of metals in different points for different 3 layers in peat blocks is developed. As an example, mathematical models for calculation of Ca and Fe concentrations have been analyzed.

Determination of Wear Metals in Oil by X-Ray Spectrometry

1985 ◽  
Vol 29 ◽  
pp. 503-509
Author(s):  
Ya-Wen Liu ◽  
A.R. Harding ◽  
D.E. Leyden
Keyword(s):  
Trace Elements ◽  
Thermal Degradation ◽  
Lower Limit ◽  
Organic Material ◽  
Limit Of Detection ◽  
Spectrometric Analysis ◽  
Trace Impurities ◽  
X Ray

AbstractTrace elements in oil may be determined by adsorption of the oil sample onto maguesium oxide followed by thermal degradation of the organic material. The resulting powder is easily pressed into a pellet suitable for X-ray spectrometric analysis. The lower limit of detection depends upon the trace impurities in the MgO and is a few parts per million for most elements determined.

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