Results 21 to 30 of about 384,770 (213)
Optimisation and application of polybrominated diphenyl ethers extraction method [PDF]
Zbornik Matice Srpske za Prirodne Nauke, 2019 The optimal conditions for the extraction of eight polybrominated diphenyl ethers (PBDEs) were determined using 32 factorial design of experiments (DOE).
Stojić Nataša S. +4 more
doaj +1 more source
Journal of Forensic Science and Medicine, 2019 In this study, a sensitive and rapid magnetic solid-phase microextraction (MSPE) procedure based on Fe3O4 nanoparticle-modified, multi-walled carbon nanotubes combined with a gas chromatography/electron capture detector (GC/ECD) was developed to quantify
Cui Yanhua +5 more
doaj +1 more source
Improving measurements of SF6 for the study of atmospheric transport and emissions [PDF]
Atmospheric Measurement Techniques, 2011 Sulfur hexafluoride (SF6) is a potent greenhouse gas and useful atmospheric tracer. Measurements of SF6 on global and regional scales are necessary to estimate emissions and to verify or examine the performance of atmospheric transport models.
D. F. Hurst +8 more
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Tạp chí Khoa học Đại học Đà Lạt, 2013 A method for the determination of organochlorine pesticides in the water samples by gas chromatography is described. The method consists of sorption of pesticides in water by Mn02 sorbent with a water: Chloroform (10:1, V/V) mixture.
Lê Ngọc Chung +1 more
doaj +1 more source
Atmosphere, 2022 The aim of this study was to develop and optimize methods for the determination of gaseous and particulate (PM2.5) secondary amines (SAs) in the atmosphere using gas chromatography coupled with electron capture detection (GC-ECD) following chemical ...
Thu Thi Hoai Mai, Hekap Kim
doaj +1 more source
A critical examination of the legislative and policy framework governing ECD service provision in South Africa since 1994. [PDF]
, 2012 Includes bibliographical references.The dissertation begins with a critical analysis of the historical and political context as regards ECD that was inherited by the ANC government of 1994.
Campbell, Paula
core +1 more source
Polychlorinated Biphenyls in Contaminated Soil Samples Evaluated by GC-ECD and GC-HRMS
, 2008 We present and compare results obtained from the analysis of polychlorinated bipheryls (PCBs) of a limited number of contaminated soil samples collected in three areas of Basilicata region (south of Italy The levels of PCBs were evaluated by using two ...
Achille Palma +5 more
core +2 more sources
Química Nova, 2014 The objective of this study was to optimize and validate a solid-liquid extraction method with low-temperature partitioning (SLE/LTP) for the analysis of pesticides.
Romenique da Silva de Freitas +4 more
doaj +1 more source
Fast and Easy Method of 55 Pesticide Residues Determination in Commonly Fruits and Vegetables Collected from Egyptian Local Markets [PDF]
Journal of Plant Protection and Pathology, 2019 The highest concerns of consumers who need food safety are pesticide residues in fruits and vegetables. In this study, a total fifty-five pesticide residues from different chemical groups including insecticides, fungicides, herbicides, acaricides and ...
Dalia Elhefny, A. A. EL-Ghanam, S. Hamed
doaj +1 more source
Use and Reuse of SPE Disks for the Determination of Pyrethroids in Water by GC-ECD [PDF]
Analytical Letters, 2009 Abstract Seven pyrethroids (bifenthrin, fenpropathrin, λ-cyhalothrin, permethrin, α-cypermethrin, fenvalerate, and deltamethrin) were extracted from water using C18 solid-phase extraction disks, followed by gas chromatography with an electron capture detector (GC-ECD) analysis.
Domingues, Valentina F. +3 more
openaire +2 more sources