Determination of polydimethylsiloxane–seawater distribution coefficients for polychlorinated biphenyls and chlorinated pesticides by solid-phase microextraction and gas chromatography–mass spectrometry

Zeng, Eddy Y.; Tsukada, David; Noblet, James A.; Jian, Peng

doi:10.1016/j.chroma.2005.01.023

Cited by 42 publications

(25 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, data from all sampling points after 6 d were used to calculate K FW values of DDTs ( Table 2). The K FW values were generally similar to those reported by Zeng et al for 100-mm-thick PDMS fiber [32], except for o,p 0 -DDD, p,p 0 -DDD, and p,p 0 -DDT. The K FW values of o,p 0 -DDD, p,p 0 -DDD, and p,p 0 -DDT were 0.4 log units to 0.5 log units smaller than those in Zeng et al [32].…”

Section: Comparison Between Prc-spme and Eq-spmesupporting

confidence: 88%

Assessing bioavailability of DDT and metabolites in marine sediments using solid‐phase microextraction with performance reference compounds

Bao

Jia

Crago

et al. 2013

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

Solid-phase microextraction (SPME) has often been used to estimate the freely dissolved concentration (Cfree) of organic contaminants in sediments. A significant limitation in the application of SPME for Cfree measurement is the requirement for attaining equilibrium partition, which is often difficult for strongly hydrophobic compounds such as DDT. A method was developed using SPME with stable isotope-labeled analogues as performance reference compounds (PRCs) to measure Cfree of DDT and metabolites (DDTs) in marine sediments. Six 13C-labeled or deuterated PRCs were impregnated into polydimethylsiloxane (PDMS) fiber before use. Desorption of PRCs from PDMS fibers and absorption of DDTs from sediment were isotropic in a range of sediments evaluated ex situ under well-mixed conditions. When applied to a historically contaminated marine sediment from a Superfund site, the PRC-SPME method yielded Cfree values identical to those found by using a conventional equilibrium SPME approach (Eq-SPME), wherease the time for mixing was reduced from 9 d to only 9 h. The PRC-SPME method was further evaluated against bioaccumulation of DDTs by Neanthes arenaceodentata in the contaminated sediment with or without amendment of activated carbon or sand. Strong correlations were consistently found between the derived equilibrium concentrations on the fiber and lipid-normalized tissue residues for DDTs in the worms. Results from the present study clearly demonstrated the feasibility of coupling PRCs with SPME sampling to greatly shorten sampling time, thus affording much improved flexibility in the use of SPME for bioavailability evaluation. Environ Toxicol Chem 2013;32:1946–1953.

show abstract

Section: Comparison Between Prc-spme and Eq-spmesupporting

confidence: 88%

Assessing bioavailability of DDT and metabolites in marine sediments using solid‐phase microextraction with performance reference compounds

Bao

Jia

Crago

et al. 2013

Enviro Toxic and Chemistry

Self Cite

View full text Add to dashboard Cite

show abstract

“…Therefore the KfVf values determined with this instrument were used for quantitation. Specifically, the KfVf values for p,p′-DDD, o,p′-DDE, and p,p′-DDE, the only components detected in the SPME samples, were 9.76((0.67) × 10 4 , 5.82((1.81) × 10 5 , and 3.41((0.54) × 10 5 µL, respectively (28). The reporting limits for the SPME samples were estimated from eq 2, but Nf was set to the lowest calibration amount (0.025 ng) in the solvent-prepared standards, and C w 0 in this specific situation was designated as the reporting limit.…”

Section: Methodsmentioning

confidence: 99%

“…Analytes sorbed on the PDMS-coated fibers were thermally desorbed into a Varian 2000 GC/ion trap-MS system (Varian Inc., Walnut Creek, CA) for quantitation. Detailed experimental parameters were given elsewhere (28), and only a brief description is presented here. A PDMS-coated fiber was inserted into the GC injection port (programmed from 100 to 280°C at ∼100°C/min and held for 40 min) and subject to desorption for 2.5 min.…”

Section: Methodsmentioning

confidence: 99%

Development of a Solid-Phase Microextraction-Based Method for Sampling of Persistent Chlorinated Hydrocarbons in an Urbanized Coastal Environment

Zeng

Tsukada

Diehl

2004

Environ. Sci. Technol.

Self Cite

View full text Add to dashboard Cite

Solid-phase microextraction (SPME) has been used as an in situ sampling technique for a wide range of volatile organic chemicals, but SPME field sampling of nonvolatile organic pollutants has not been reported. This paper describes the development of an SPME-based sampling method employing a poly(dimethylsiloxane) (PDMS)-coated (100-microm thickness) fiber as the sorbent phase. The laboratory-calibrated PDMS-coated fibers were used to construct SPME samplers, and field tests were conducted at three coastal locations off southern California to determine the equilibrium sampling time and compare the efficacy of the SPME samplers with that of an Infiltrex 100 water pumping system (Axys Environmental Systems Ltd., Sidney, British Columbia, Canada). p,p'-DDE and o,p'-DDE were the components consistently detected in the SPME samples among 42 polychlorinated biphenyl congeners and 17 chlorinated pesticidestargeted. SPME samplers deployed attwo locations with moderate and high levels of contamination for 18 and 30 d, respectively, attained statistically identical concentrations of p,p'-DDE and o,p'-DDE. In addition, SPME samplers deployed for 23 and 43 d, respectively, at a location of low contamination also contained statistically identical concentrations of p,p'-DDE. These results indicate that equilibrium could be reached within 18 to 23 d. The concentrations of p,p'-DDE, o,p'-DDE, or p,p'-DDD obtained with the SPME samplers and the Infiltrex 100 system were virtually identical. In particular, two water column concentration profiles of p,p'-DDE and o,p'-DDE acquired by the SPME samplers at a highly contaminated site on the Palos Verdes Shelf overlapped with the profiles obtained by the Infiltrex 100 system in 1997. The field tests not only reveal the advantages of the SPME samplers compared to the Infiltrex 100 system and other integrative passive devices but also indicate the need to improve the sensitivity of the SPME-based sampling technique.

show abstract

“…Due to the steric and probably also electronic effect of the ether linkage, it is impossible for PBDEs to be planar, regardless of the number and the positions of bromines. Although the angle between the two phenyl rings at optimal conformation does differ among structural isomers depending on bromine positions [31], the effect of these difference on GC retention may be much less than the number of bromines in the molecule.…”

Section: Comparison In Retention Behavior Between Pbdes and Pcbsmentioning

confidence: 99%

Development of quantitative structure gas chromatographic relative retention time models on seven stationary phases for 209 polybrominated diphenyl ether congeners

Wang

Liu

et al. 2006

Journal of Chromatography A

View full text Add to dashboard Cite

Quantitative structure retention relationships (QSRRs) were developed to predict the gas chromatographic (GC) relative retention times (RRTs) for 209 polybrominated diphenyl ether (PBDE) congeners using the heuristic method included in the computer software Comprehensive Descriptors for Structural and Statistical Analysis (CODESSA). A total of 445 constitutional, topological, geometrical, electrostatic, and semi-empirical quantum chemical descriptors were derived for all PBDEs. Using experimental RRT data for 126 PBDE congeners from the literature, predictive regression models were built for seven individual GC capillary columns differing in stationary phases. Each model includes four descriptors which included Wiener index, Randic index, polarity parameter, etc., selected by CODESSA. High predictability was obtained. High multiple correlation coefficients R 2 indicated that >98.5% (except for stationary phase CP-Sil 19) of the total variation in the predicted RRTs is explained by the fitted models. The models were subsequently used to predict the RRTs of the remaining 83 PBDE congeners on seven different stationary phases. The statistical results show that, compared with others, DB-XLB column not only produces the least number of peak overlaps but also results in shorter retention times.

show abstract

Determination of polydimethylsiloxane–seawater distribution coefficients for polychlorinated biphenyls and chlorinated pesticides by solid-phase microextraction and gas chromatography–mass spectrometry

Cited by 42 publications

References 24 publications

Assessing bioavailability of DDT and metabolites in marine sediments using solid‐phase microextraction with performance reference compounds

Assessing bioavailability of DDT and metabolites in marine sediments using solid‐phase microextraction with performance reference compounds

Development of a Solid-Phase Microextraction-Based Method for Sampling of Persistent Chlorinated Hydrocarbons in an Urbanized Coastal Environment

Development of quantitative structure gas chromatographic relative retention time models on seven stationary phases for 209 polybrominated diphenyl ether congeners

Contact Info

Product

Resources

About