Interlaboratory Study of Analytical Methods for Petroleum Hydrocarbons

2009 ◽  
pp. 53-53-8
Author(s):  
JL Parr ◽  
RE Claff ◽  
DS Kocurek ◽  
JC Lowry
Keyword(s):  
Analytical Methods ◽  
Petroleum Hydrocarbons ◽  
Interlaboratory Study

scholarly journals Determination of total petroleum hydrocarbons in soil from different locations using infrared spectrophotometry and gas chromatography

2012 ◽  
Vol 66 (8) ◽  
Author(s):  
Paula Paíga ◽  
Lurdes Mendes ◽  
José Albergaria ◽  
Cristina Delerue-Matos
Keyword(s):  
Gas Chromatography ◽  
Organic Matter ◽  
Analytical Methods ◽  
Contaminated Soils ◽  
Petroleum Hydrocarbons ◽  
Organic Matter Content ◽  
Matter Content ◽  
Total Petroleum Hydrocarbons ◽  
Infrared Spectrometry ◽  
Ir Analysis

AbstractTotal petroleum hydrocarbons (TPH) are important environmental contaminants which are toxic to human and environmental receptors. Several analytical methods have been used to quantify TPH levels in contaminated soils, specifically through infrared spectrometry (IR) and gas chromatography (GC). Despite being two of the most used techniques, some issues remain that have been inadequately studied: a) applicability of both techniques to soils contaminated with two distinct types of fuel (petrol and diesel), b) influence of the soil natural organic matter content on the results achieved by various analytical methods, and c) evaluation of the performance of both techniques in analyses of soils with different levels of contamination (presumably non-contaminated and potentially contaminated). The main objectives of this work were to answer these questions and to provide more complete information about the potentials and limitations of GC and IR techniques. The results led us to the following conclusions: a) IR analysis of soils contaminated with petrol is not suitable due to volatilisation losses, b) there is a significant influence of organic matter in IR analysis, and c) both techniques demonstrated the capacity to accurately quantify TPH in soils, irrespective of their contamination levels.

Rapid Field Analytical Methods for Total Petroleum Hydrocarbons

2017 ◽  
Author(s):  
Deyuan Kong ◽  
Thomas Hoelen ◽  
Sara Mcmillen ◽  
Timothy Vidra ◽  
Sarah Chitra ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Petroleum Hydrocarbons ◽  
Total Petroleum Hydrocarbons

scholarly journals NIST Interlaboratory Study on Glycosylation Analysis of Monoclonal Antibodies: Comparison of Results from Diverse Analytical Methods

2019 ◽  
Vol 19 (1) ◽  
pp. 11-30 ◽  
Author(s):  
Maria Lorna A. De Leoz ◽  
David L. Duewer ◽  
Adam Fung ◽  
Lily Liu ◽  
Hoi Kei Yau ◽  
...  
Keyword(s):  
Analytical Methods ◽  
State Of The Art ◽  
Full Range ◽  
Measurement Techniques ◽  
Protein Glycosylation ◽  
Interlaboratory Study ◽  
Specific Method ◽  
Protein Fragments ◽  
Current State ◽  
Primary Sample

Glycosylation is a topic of intense current interest in the development of biopharmaceuticals because it is related to drug safety and efficacy. This work describes results of an interlaboratory study on the glycosylation of the Primary Sample (PS) of NISTmAb, a monoclonal antibody reference material. Seventy-six laboratories from industry, university, research, government, and hospital sectors in Europe, North America, Asia, and Australia submitted a total of 103 reports on glycan distributions. The principal objective of this study was to report and compare results for the full range of analytical methods presently used in the glycosylation analysis of mAbs. Therefore, participation was unrestricted, with laboratories choosing their own measurement techniques. Protein glycosylation was determined in various ways, including at the level of intact mAb, protein fragments, glycopeptides, or released glycans, using a wide variety of methods for derivatization, separation, identification, and quantification. Consequently, the diversity of results was enormous, with the number of glycan compositions identified by each laboratory ranging from 4 to 48. In total, one hundred sixteen glycan compositions were reported, of which 57 compositions could be assigned consensus abundance values. These consensus medians provide community-derived values for NISTmAb PS. Agreement with the consensus medians did not depend on the specific method or laboratory type. The study provides a view of the current state-of-the-art for biologic glycosylation measurement and suggests a clear need for harmonization of glycosylation analysis methods.

scholarly journals A review on analytical methods of petroleum hydrocarbons in water and sediment of aquatic systems

2021 ◽  
Vol 621 ◽  
pp. 012011
Author(s):  
Zongkai Yue ◽  
Qirang Shi ◽  
Jia Ai ◽  
Shitao Peng ◽  
Xinyu Miao ◽  
...  
Keyword(s):  
Analytical Methods ◽  
Petroleum Hydrocarbons ◽  
Aquatic Systems ◽  
Water And Sediment

Stereo modeling of HVEM specimens by serial tilting and computer graphics

1986 ◽  
Vol 44 ◽  
pp. 34-35
Author(s):  
J.R. McIntosh ◽  
D.L. Stemple ◽  
William Bishop ◽  
G.W. Hannaway
Keyword(s):  
Computer Graphics ◽  
Analytical Methods ◽  
Photographic Film ◽  
Complex Structures ◽  
Multiple Objects ◽  
Multiple Images ◽  
3 Dimensional

EM specimens often contain 3-dimensional information that is lost during micrography on a single photographic film. Two images of one specimen at appropriate orientations give a stereo view, but complex structures composed of multiple objects of graded density that superimpose in each projection are often difficult to decipher in stereo. Several analytical methods for 3-D reconstruction from multiple images of a serially tilted specimen are available, but they are all time-consuming and computationally intense.

Sign in / Sign up

Export Citation Format

Share Document