Quantitative determination of ultra-traces of chlorinated compounds in high-volume air samples from the Arctic using polyurethane foam as collection medium

1982 ◽  
Vol 311 (7) ◽  
pp. 665-673 ◽  
Author(s):  
M. Oehme ◽  
H. Stray
Keyword(s):  
Quantitative Determination ◽  
Polyurethane Foam ◽  
High Volume ◽  
The Arctic ◽  
Chlorinated Compounds ◽  
Air Samples ◽  
Collection Medium

Vapor Phase Chromatography in Quantitative Determination of Air Samples Collected in the Field

AIHAJ ◽  
1959 ◽  
Vol 20 (3) ◽  
pp. 175-182 ◽  
Author(s):  
R. H. Mansur ◽  
R. F. Pero ◽  
L. A. Krause
Keyword(s):  
Quantitative Determination ◽  
Vapor Phase ◽  
Air Samples

Field intercomparison on the determination of volatile and semivolatile polyfluorinated compounds in air

2010 ◽  
Vol 7 (4) ◽  
pp. 350 ◽  
Author(s):  
Annekatrin Dreyer ◽  
Mahiba Shoeib ◽  
Stefan Fiedler ◽  
Jon Barber ◽  
Tom Harner ◽  
...  
Keyword(s):  
Polyurethane Foam ◽  
High Volume ◽  
Passive Samplers ◽  
Future Research ◽  
Natural Environments ◽  
Sampling Strategies ◽  
Monitoring Methods ◽  
Semipermeable Membrane Devices ◽  
Polyfluorinated Compounds

Environmental context.Polyfluorinated compounds are an emerging group of organic pollutants that are globally distributed in urban and natural environments. Reliable air monitoring methods are crucial to our understanding of how these pollutants are released to, and transported in, the atmosphere. This intercomparison study, involving laboratories that investigate polyfluorinated compounds in air, uncovers inconsistencies in the reported data, and highlights necessary analytical improvements for future research projects. Abstract.Fluorotelomer alcohols, perfluorinated sulfonamides or sulfonamido ethanols are volatile precursors of persistent perfluorinated acids. Published air-sampling strategies and analytical methods to determine these compounds differ. To assess performance on the determination of airborne polyfluorinated compounds, an intercomparison comprising four international research groups was established. Instrumental and analytical comparability between laboratories varied depending on the compound class. Variability in different sampling strategies was assessed for active (high-volume) v. passive samplers consisting of either semipermeable membrane devices or sorbent-impregnated polyurethane foam disks. Results from passive samplers were typically within an order of magnitude of air concentrations from averaged continuous high-volume samples. Smallest deviations (passive v. active) were observed for sorbent-impregnated polyurethane foam disk samplers with best agreement for fluorotelomer alcohols. This study reveals that it is important to be aware of several types of uncertainty or error for the determination of airborne polyfluorinated compounds and report data in this context or to take steps to minimise their impact.

scholarly journals OPTIMIZATION OF PESTICIDES RESIDUES ANALYTICAL CONTROL IN CEREAL CROPS PROTECTION SYSTEM

2019 ◽  
Vol 15 (3-4) ◽  
pp. 76-84
Author(s):  
M.M. Korshun ◽  
O.M. Korshun ◽  
A.O. Lipavska ◽  
T.I. Zinchenko ◽  
S.V. Bilous ◽  
...  
Keyword(s):  
Quantitative Determination ◽  
High Efficiency ◽  
Negative Impact ◽  
Protection System ◽  
Cereal Crops ◽  
Analytical Determination ◽  
Analytical Control ◽  
Simultaneous Presence ◽  
Air Samples

Relevance. The scientific substantiation of the method selection, the development of conditions for qualitative identification and quantitative determination of Axial 050 EC, Peak 75 WG, Tilt 250 EC, Magnello 350 EC, Enzhio 247 SS, Karate Zeon 050 CC pesticides (by its simultaneous presence) used in cereal crops protection system was given in the article, as well as preparation conditions for the analysis of water and air samples were described, which will allow to control the established hygienic standards and minimize pesticide negative impact on population health and the environment. Objective of the research is to develop methods for the analytical determination of 9 active substances of 7 pesticide preparations applied in the wheat and barley protection system with its simultaneous presence in water and air. Materials and methods. Chromatographic analysis was performed by Shimazu (Japan) liquid chromatograph. Chromatograph control, recording, analysis and storage of chromatographic data were performed using S/w LC solution software. The package of IBM SPSS StatisticsBase v.22 and MS Exel statistical programs was used for statistical processing of results. Results. The developed optimal conditions of sample preparation and chromatographic determination in the combined presence of 9 different chemical classes pesticides used in the cereal crops protection system will allow to control their content with the limit of quantitative determination of each compound 0,001 mg/dm3 in the water sample, and 0,05 mg/m3 in the air, thus allowing control the established hygienic standards of these compounds in the water and in the working zone air. Conclusions. The conditions for simultaneous determination of prosulfuron and pinoxaden herbicides, thiamethoxam and lambda-cyhalothrin insecticides, fludioxonil, sedaxane, tebuconazole, propiconazole, diphenoconazole fungicides in its combined presence in the water or air samples by high-efficiency liquid chromatography method were elaborated allowing the efficiency of analysis to be increased and its total price to be reduced.

scholarly journals Quantitative Determination of Phthalate Esters from Air Samples Using a Solid-Phase Extraction-type Collection Device

2018 ◽  
Vol 34 (10) ◽  
pp. 1149-1153 ◽  
Author(s):  
Ikuo UETA ◽  
Risa TAKENAKA ◽  
Koji FUJIMURA ◽  
Tomotaka YOSHIMURA ◽  
Shoji NARUKAMI ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Quantitative Determination ◽  
Solid Phase ◽  
Phthalate Esters ◽  
Phase Extraction ◽  
Type Collection ◽  
Air Samples ◽  
Collection Device

Quantitative determination of longitudinal and transverse cross-relaxation rates

1999 ◽  
Vol 96 (9/10) ◽  
pp. 1608-1615
Author(s):  
T. E. Malliavin ◽  
H. Desvaux ◽  
M. A. Delsuc
Keyword(s):  
Quantitative Determination ◽  
Cross Relaxation ◽  
Relaxation Rates

Quantitative Determination of Gallic acid and Cyanidin-3-O-Glucoside within Sumac Extracts by HPLC-MS/MS

Planta Medica ◽  
2011 ◽  
Vol 77 (12) ◽  
Author(s):  
M Koşar ◽  
F Göger ◽  
N Kırımer ◽  
KHC Başer
Keyword(s):  
Quantitative Determination ◽  
Gallic Acid
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