Bio-based products. Determination of the bio based carbon content of products using the radiocarbon method

2015 ◽  
Keyword(s):  
Carbon Content

Determination of Carbon Content in Steel Using Laser-Induced Breakdown Spectroscopy

1992 ◽  
Vol 46 (9) ◽  
pp. 1382-1387 ◽  
Author(s):  
J. A. Aguilera ◽  
C. Aragón ◽  
J. Campos
Keyword(s):  
Carbon Content ◽  
Matrix Effects ◽  
Sample Surface ◽  
Nitrogen Atmosphere ◽  
Laser Induced Breakdown Spectroscopy ◽  
Time Resolved ◽  
Breakdown Spectroscopy ◽  
Use Of Time ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy has been used to determine carbon content in steel. The plasma was formed by focusing a Nd:YAG laser on the sample surface. With the use of time-resolved spectroscopy and generation of the plasma in nitrogen atmosphere, a precision of 1.6% and a detection limit of 65 ppm have been obtained. These values are similar to those of other accurate conventional techniques. Matrix effects for the studied steels are reduced to a small slope difference between the calibration curves for stainless and nonstainless steels.

scholarly journals Conversion of lignocellulosic agricultural wastes into adsorbents for pharmaceutical drugs

2019 ◽  
pp. 24-31
Author(s):  
Anca Cruceanu ◽  
Monica Alexandra Vaideanu ◽  
Rodica Zavoianu ◽  
Elena Bacalum ◽  
Octavian Dumitru Pavel
Keyword(s):  
Thermal Treatment ◽  
Carbon Content ◽  
Chemical Activation ◽  
Agricultural Wastes ◽  
Pharmaceutical Drugs ◽  
Adsorption Efficiency ◽  
Boehm Titration ◽  
The One ◽  
Amoxicillin Removal

Lignocellulosic agricultural wastes e.g. corn cobs, straws and corn stalks were converted into carbonaceous adsorbents using a sequence of thermal and chemical activation processes. The derived solids obtained after each type of activation were characterized by determination of fix carbon content, iodine number, Boehm titration and DRIFT spectrometry. The results obtained at the adsorption tests were well correlated to those of the characterization, showing that the most promising adsorbents for amoxicillin removal were those submitted to a thermal treatment followed by a chemical alkaline activation, followed by washing and a secondary thermal treatment. The most promising bio-based adsorbent was the one derived from corn stalks (90.6% adsorption efficiency).

Method intercomparison for the determination of black carbon content in aerosols

1998 ◽  
Vol 29 ◽  
pp. S751-S752 ◽  
Author(s):  
R. Hitzenberger ◽  
S.G. Jennings ◽  
S.M. Larson ◽  
A. Dillner ◽  
H. Cachier ◽  
...  
Keyword(s):  
Carbon Content ◽  
Black Carbon ◽  
Black Carbon Content

scholarly journals Part II.- Quantitative methods and technique of investigation of the products of metabolism of micro-organisms

1931 ◽  
Vol 220 (468-473) ◽  
pp. 11-26 ◽  
Keyword(s):  
Quantitative Determination ◽  
Carbon Content ◽  
Quantitative Methods ◽  
Chemical Compounds ◽  
Introductory Paper ◽  
Micro Organisms

At the commencement of this work it was decided, as outlined on p. 7 in the introductory paper in this series, to take as the basis of the investigations the quantitative determination of the types of compounds formed by micro-organisms. Hence it became necessary to devise methods of separating “the products of metabolism arising from glucose into different types of chemical compounds, and of isolating them in a form suitable for the subsequent estimation of their carbon content by combustion. The methods adopted will be described.

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