A rapid method to determine bunker c fuel oil in marine organisms

1975 ◽  
Vol 14 (3) ◽  
pp. 309-312 ◽  
Author(s):  
Norman L. Morgan
Keyword(s):  
Rapid Method ◽  
Marine Organisms ◽  
Fuel Oil

EVALUATION OF SOME METHODS OF ANALYSIS FOR PETROLEUM HYDROCARBONS IN MARINE ORGANISMS

1975 ◽  
Vol 1975 (1) ◽  
pp. 115-121 ◽  
Author(s):  
John W. Farrington ◽  
Gilbert C. Medeiros
Keyword(s):  
Gas Chromatography ◽  
Soxhlet Extraction ◽  
Marine Organisms ◽  
Fuel Oil ◽  
Bay Area ◽  
Large Numbers ◽  
Significant Difference ◽  
The Difference ◽  
Replicate Measurements ◽  
Digestion Methods

ABSTRACT Soxhlet extraction, homogenization with Na2So4 in a Virtis homogenizer, and KOH-methanol digestion methods of extracting hydrocarbons from marine organisms have been tested and compared using subsamples of a clam (Marcenaria mercenaria) homogenate. The amounts of hydrocarbons were determined gravimetrically and the composition was partially characterized by gas chromatography. There was a statistically significant difference between the results of the Virtis vs. Soxhlet and Soxhlet vs. digestion methods. However, in practice the difference is small and would be apparent only if large numbers of replicate measurements were made. The concentration of hydrocarbons in clams from three locations, a polluted harbor area, a less polluted bay area, and a relatively clean bay have been determined. The composition was partially characterized by gas chromatography. Subsamples of clam homogenate spiked with 10 ppm API No. 2 fuel oil have been analyzed. Only 5 to 6 ppm of the spike were detected. Gas chromatographic analysis indicated that the lower molecular weight components of the spike were lost. The gas chromatographic passive tagging parameters were altered from those of the API No. 2 fuel oil by interference from hydrocarbons already present in the clams prior to spiking.

Extraction of Living Meiofauna from Marine Sediments by Centrifugation in a Silica Sol—Sorbitol Mixture

1981 ◽  
Vol 38 (4) ◽  
pp. 476-478 ◽  
Author(s):  
Peter Schwinghamer
Keyword(s):  
Rapid Method ◽  
Marine Sediments ◽  
Silica Sol ◽  
Marine Organisms ◽  
Muddy Sediments

A simple, rapid method is described for the extraction of living marine organisms from sandy and muddy sediments using centrifugation in a buffered mixture of sorbitol and the silica sol Percoll. The method is suitable for the collection of delicate species of "soft" meiofauna. Combined with the use of an inverted plankton microscope and settling chambers, this method greatly reduces the time and labor spent in extracting and identifying meiobenthic organisms and benthic microalgae.Key words: meiofauna, Percoll, extraction

Acute toxicity of a #6 fuel oil to marine organisms

1980 ◽  
Vol 24 (1) ◽  
pp. 656-661 ◽  
Author(s):  
T. A. Hollister ◽  
G. S. Ward ◽  
P. R. Parrish
Keyword(s):  
Acute Toxicity ◽  
Marine Organisms ◽  
Fuel Oil

Fluidized Catalytic Cracking Catalyst Microstructure as Determined by A Scanning Ion Microprobe

1990 ◽  
Vol 48 (2) ◽  
pp. 302-303
Author(s):  
J.K. Lampert ◽  
G.S. Koermer ◽  
J.M. Macaoy ◽  
J.M. Chabala ◽  
R. Levi-Setti
Keyword(s):  
Catalytic Cracking ◽  
Secondary Ion Mass Spectrometry ◽  
Fuel Oil ◽  
Ion Microprobe ◽  
Fluidized Catalytic Cracking ◽  
Ion Probe ◽  
Silica Alumina ◽  
Resolution Imaging ◽  
The University ◽  
High Spatial Resolution Imaging

We have used high spatial resolution imaging secondary ion mass spectrometry (SIMS) to differentiate mineralogical phases and to investigate chemical segregations in fluidized catalytic cracking (FCC) catalyst particles. The oil industry relies on heterogeneous catalysis using these catalysts to convert heavy hydrocarbon fractions into high quality gasoline and fuel oil components. Catalyst performance is strongly influenced by catalyst microstructure and composition, with different chemical reactions occurring at specific types of sites within the particle. The zeolitic portions of the particle, where the majority of the oil conversion occurs, can be clearly distinguished from the surrounding silica-alumina matrix in analytical SIMS images.The University of Chicago scanning ion microprobe (SIM) employed in this study has been described previously. For these analyses, the instrument was operated with a 40 keV, 10 pA Ga+ primary ion probe focused to a 30 nm FWHM spot. Elemental SIMS maps were obtained from 10×10 μm2 areas in times not exceeding 524s.

Texture measurements in Al2O3 using BEKP

1994 ◽  
Vol 52 ◽  
pp. 608-609
Author(s):  
M. D. Vaudin ◽  
J. P. Cline
Keyword(s):  
Neutron Diffraction ◽  
Rapid Method ◽  
Crystallographic Orientation ◽  
Specimen Surface ◽  
X Ray Diffraction ◽  
Anisotropic Crystal ◽  
X Ray ◽  
Verification Method ◽  
Crystal Properties ◽  
Backscattered Electron

The study of preferred crystallographic orientation (texture) in ceramics is assuming greater importance as their anisotropic crystal properties are being used to advantage in an increasing number of applications. The quantification of texture by a reliable and rapid method is required. Analysis of backscattered electron Kikuchi patterns (BEKPs) can be used to provide the crystallographic orientation of as many grains as time and resources allow. The technique is relatively slow, particularly for noncubic materials, but the data are more accurate than any comparable technique when a sufficient number of grains are analyzed. Thus, BEKP is well-suited as a verification method for data obtained in faster ways, such as x-ray or neutron diffraction. We have compared texture data obtained using BEKP, x-ray diffraction and neutron diffraction. Alumina specimens displaying differing levels of axisymmetric (0001) texture normal to the specimen surface were investigated.BEKP patterns were obtained from about a hundred grains selected at random in each specimen.

INFLAMMATION, CHEMOKINE EXPRESSION, AND DEATH IN MONOCROTALINE-TREATED RATS FOLLOWING FUEL OIL FLY ASH INHALATION

1997 ◽  
Vol 9 (6) ◽  
pp. 541-565 ◽  
Author(s):  
Cheryl R. Killingsworth ◽  
Francesca Alessandrini ◽  
G. G. Krishna Murthy ◽  
Paul J. Catalano ◽  
Joseph D. Paulauskis ◽  
...  
Keyword(s):  
Fly Ash ◽  
Fuel Oil ◽  
Chemokine Expression ◽  
Oil Fly Ash
Sign in / Sign up

Export Citation Format

Share Document