Pcb Sampling Articles & Analysis: Older
29 articles found
The analysis of PCBs in soil samples mainly includes sample preparation, extraction, purification and qualitative and quantitative analysis. ...
The analysis of PCBs in soil samples mainly includes sample preparation, extraction, purification and qualitative and quantitative analysis. The chemical analysis for PCBs Sample Preparation After the soil samples are sent to the laboratory, in general, the moisture content of the soil has to be ...
Despite bans and restrictions for their adverse health effects including endocrine disruption, due to their stability in the environment, polychlorinated biphenyls (PCBs) are still of concern for their residues in several matrices. This study employed low-density ultrasound-assisted emulsification–microextraction (USAEME) to measure selected PCBs (28, 52, ...
Average Recoveries of PCBs From 10 ng/g Spiked Cod Liver Oil Samples Using Supelclean EZ-POP NP Followed by Silica Gel SPE Cleanup, (n=6) Figure 4. GC/ECD Analysis of Unspiked Cod Liver Oil Sample for Targeted PCB Congeners Using Supelclean EZ-POP NP Followed by Silica Gel SPE Cleanup Conditions the same as listed in ...
Polychlorinated biphenyls (PCBs) from the commercial mixture Aroclor 1268 were historically released into the Turtle‐Brunswick River Estuary (TBRE, southeastern Georgia, USA) from industrial operations. Sum PCBs (ΣPCBs) in blubber samples from TBRE bottlenose dolphins (Tursiops truncatus) have been reported at concentrations more than 10‐fold ...
Additionally, "in house" surface decontamination efficacy determination of DeconGel 1101 and 1102 on stainless steel, aluminum, and concrete surfaces contaminated with PCB (polychlorinated biphenyls) oil performed with GC/MS (Gas Chromatography/Mass Spectrometry) according to Environmental Protection Agency (EPA) SW-846 Methods: 3500C (Sampling) and 8270C ...
Here we present a comparison of the results of individual analyses of PCBs and PAHs from soil samples with single-quadrupole GC-MS and a triple-quadrupole GC-MS (TQ-GCMS). The use of hydrogen carrier gas is, however, still a work in progress for the multiple reaction monitoring (MRM) optimization for the TQ-GCMS. Sample Preparation Soil ...
Environmental Protection Agency (EPA) develops methods and tools for evaluating risk management strategies for sediments contaminated with polychlorinated biphenyls (PCBs), polycyclic aromatic hydrocarbons (PAHs), and other legacy pollutants. ...
We compared the distributions of the congeners of polychlorinated biphenyls (PCBs) detected in whole‐body samples of burbot (Lota lota) from Great Slave Lake and Lake Erie. Total PCB concentrations in Great Slave Lake burbot were about 1/60 of the concentrations in Lake Erie burbot. ...
Willow tree bark samples from urban and rural sites in Inner Mongolia, Ningxia Province, and Gansu Province, in the Yellow River basin, were analyzed for polybrominated diphenyl ethers (PBDEs), dechlorane plus (DP), and dioxin‐like polychlorinated biphenyls (DL‐PCBs) to compare their relative levels in air in these areas (i.e., treating bark as a passive air ...
No additional post extraction cleanup was required and sample throughput was reduced to 2.5 h per sample. Target analytes were quantified using HRGC – ECNI/MS and verified by HRGC – HRMS. ...
The objective of the study was assessment of occurrence and removal of two groups of persistent organic pollutants: polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs) in landfill leachate (LL) treated in three constructed wetland systems (CWs) of different construction and flow regime. ...
Contaminants enter marine and estuarine environments and pose a risk to human and ecological health. Recently, passive sampling devices have been utilized to estimate dissolved concentrations of COCs, such as polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). In the present study, the performance of three common passive samplers was ...
To evaluate the consistency and possible causes of this behavior, polychlorinated biphenyl (PCB) contaminated sediment samples from the Hudson, Grasse, and Fox Rivers Superfund sites were used in sediment bioaccumulation tests with the freshwater oligochaete, Lumbriculus variegatus, with PCB concentrations in interstitial water (IW) quantified ...
These phases will offer an orthogonal separation mechanism compared to the nonpolar phases that are widely used to analyze environmental samples. In this study we will demonstrate the classical selectivity determination of the phases along with analyzing a series of polychlorinated biphenyl (PCB) samples. ...
The purpose of this study was to determine the levels of polychlorinated biphenyls (PCBs) and phthalates in homogenized polymer samples from polymer waste streams using two different pressurized fluid extraction instruments (ASE and SpeedExtractor). Both extraction methods showed very similar results. Measured PCB levels were in the lower and sub ...
ByBUCHI
Efficacy (%) 72.0 ± 1.0 ≥95.0 87.0 ± 1.0 ≥95.0 1 1212x dilution factor for samples and controls 2 784x dilution factor for samples and controls 3 941x dilution factor for samples and controls * lower detection limit of samples/control preparative method = 0.8 ppm ...
The variation of the PCDD/F and DL-PCB concentrations in all fish samples is very large, whereby the DL-PCBs predominate in comparison to the PCDD/Fs. In the eels, the concentrations (pg WHO-TEQ/g ww) for the PCDD/Fs lie in the range of 0.48–22 and for the DL-PCBs between 8.5 and 59. In the whitefish, the concentration ...
This review summarizes procedures and examines new approaches for extraction, isolation, identification and quantification of individual congeners/isomers of the PCBs and OCPs. Critical to the successful application of this methodology is the collection, preparation, and storage of samples, as well as specific quality control and reporting criteria, and ...
Abstract Analytical techniques for the determination of polychorinated dibenzo-p-dioxins (PCDD), polychlorinated dibenzofurans (PCDF) and dioxin-like PCBs (DLPCB) are reviewed. The focus of the review is on recent advances in methodology and analytical procedures. ...