Simple and Efficient Microwave-Assisted Hydrogenation Reactions at Moderate Temperature and Pressure.

ChemInform ◽  
2007 ◽  
Vol 38 (19) ◽  
Author(s):  
Grace S. Vanier
Keyword(s):  
Moderate Temperature ◽  
Microwave Assisted ◽  
Hydrogenation Reactions ◽  
Temperature And Pressure

Microwave-Assisted Chemoselective Hydrogenation Reactions Incorporating Hydrogen as Reducing Agent

2011 ◽  
Vol 34 (3) ◽  
pp. 445-451 ◽  
Author(s):  
C. Schmöger ◽  
T. Gallert ◽  
A. Stolle ◽  
B. Ondruschka ◽  
W. Bonrath
Keyword(s):  
Reducing Agent ◽  
Microwave Assisted ◽  
Chemoselective Hydrogenation ◽  
Hydrogenation Reactions

Influence of Pressure to Morphology of TiO2 Nanofibers Prepared by Microwave-Assisted Synthesis Method

2019 ◽  
Vol 800 ◽  
pp. 132-137
Author(s):  
Reinis Drunka ◽  
Jānis Grabis ◽  
Aija Krumina
Keyword(s):  
Hydrothermal Synthesis ◽  
Specific Surface ◽  
Surface Area ◽  
Specific Surface Area ◽  
Synthesis Method ◽  
Microwave Assisted Synthesis ◽  
Large Specific Surface Area ◽  
High Quality ◽  
Microwave Assisted ◽  
Temperature And Pressure

Microwave-assisted hydrothermal synthesis of TiO2 nanofibers under various temperature and pressure conditions were done in this research. High quality TiO2 nanofiber coatings where obtained when temperature was in range 240 – 245 °C and pressure was 27.3 – 29.1 bar. Obtained TiO2 nanofiber coatings are with a specific surface area of ​​151.5 to 158.9 m2· g-1 before calcination. Comparing with nanopowder photocatalysts nanofiber coatings photocatalysts can be much easier removed from solution after the photocatalysis process. Such coatings with relative large specific surface area are with higher potential application in industry.

Determination of Arsenic, Cadmium, Mercury, and Lead in Foods by Pressure Digestion and Inductively Coupled Plasma/Mass Spectrometry: First Action 2013.06

2013 ◽  
Vol 96 (5) ◽  
pp. 1101-1102 ◽  
Author(s):  
Kaare Julshamn ◽  
Amund Maage ◽  
Hilde Skaar Norli ◽  
Karl H Grobecker ◽  
Lars Jorhem ◽  
...  
Keyword(s):  
Inductively Coupled Plasma ◽  
Dry Matter ◽  
Elemental Concentration ◽  
Inductively Coupled ◽  
Microwave Assisted ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Food Digestion ◽  
Temperature And Pressure

Abstract The method for the determination of As, Cd, Hg, and Pb in foods by pressure digestion and inductively coupled plasma (ICP)/MS, previously published in J.AOAC Int. 90, 844–856 (2007), was approved as First Action 2013.06 on April 9, 2013 by the Method-Centric Committee for Elemental Contaminants in Food. Digestion occurs using nitric acid in a closed vessel with elevated temperature and pressure by conventional or microwave-assisted heating. Determination occurs using ICP/MS. The elemental concentration ranges for As were 0.06–21.4, for Cd 0.03–28.3, for Hg 0.04–0.6, and for Pb 0.01–2.4 in mg/kg dry matter. The repeatability RSD (RSDr) ranged from 3.8 to 24% for As, 2.6 to 6.9% for Cd, 4.8 to 8.3% for Hg, and 2.9 to 27% for Pb. Reproducibility RSD (RSDR) ranged from 9.0 to 28% for As, 2.8 to 18% for Cd, 9.9 to 24% for Hg, and 8 to 50% for Pb.

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