Health & Environmental Research Online (HERO)


PFPeA (2706-90-3)


256 References Were Found:

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Simultaneous Determination of Nine Perfluorinated Carboxylic Acids in Water by Gas Chromatography with Electron Capture Detector

Authors: Xia Jing-Fen; Yuan Kai; Yang Guo-Jing; Tang Li; Lu Chen; Wang Dong-Bo; Li Xiao-Ming; Zeng Guang-Ming (2017) HERO ID: 3859893

[Less] A method for the simultaneous determination of nine perfluorocarboxylic acids (PFCAs) in water by precolumn . . . [More] A method for the simultaneous determination of nine perfluorocarboxylic acids (PFCAs) in water by precolumn derivatization. gas chromatography. electron capture detector (GC-ECD) was established. PFCAs were firstly converted to amide derivative products using 2,4. difluoroaniline (2,4-DFA) as derivatizing agent and N, N'-dicyclohexylcarbodiimide (DCC) as dehydrating agent. Then the amide derivative products were determined by ECD after separation with TR-5 capillary. column chromatography. The experimental conditions in derivatization of PFCAs were optimized, including the dosage of 2,4-DFA and DCC, reaction solvent, reaction temperature and reaction time. The optimal derivatization parameters were obtained. The results showed that the linear correlation coefficients of nine derivative products of PFCAs were higher than 0.99 under the optimized experimental conditions. The limits of detection were 0.62 - 1.38. mu g/L, while the relative standard derivations RSDs were 1.3% - 7.5%. The proposed method was applied to the analysis of PFCAs in municipal sewage. It was found that the municipal sewage contained trace PFCAs which mainly existed in the form of perfluoropentanoic acid (PFPeA), perfloroheptanoic acid (PFHpA) and pentadecafluorooctanoic acid (PFOA). The recoveries of actual samples were between 84.4% and 120.9%. The method was stable and reliable with low cost, and it could meet the simultaneous determination of several PFCAs in water samples. This study provided technical support for the pollution assessment of perfluorinated compounds in water.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Quantitation of levodopa and carbidopa in rat plasma by LC-MS/MS: The key role of ion-pairing reversed-phase chromatography

Authors: Chi, J; Ling, Y; Jenkins, R; Li, F (2017) Journal of Chromatography B, Analytical Technologies in the Biomedical and Life Sciences 1054:1-9. HERO ID: 3860312

[Less] A simple and selective bioanalytical method was developed for simultaneous determination of levodopa . . . [More] A simple and selective bioanalytical method was developed for simultaneous determination of levodopa and carbidopa in rat plasma by LC-MS/MS. Levodopa and carbidopa are small polar molecules, posing challenges in the development of selective and efficient chromatography conditions. Perfluoropentanoic acid (PFPA), a volatile ion-pairing agent, was utilized to enhance chromatographic characteristics of both compounds in the reversed-phase mechanism. The ion-pairing chromatography played an essential role in mitigating matrix effects and achieving adequate separation between interfering background peaks and those of the analytes of interest, especially for levodopa. A 96-well based, automated liquid-liquid extraction, via the use Hamilton NIMBUS liquid handlers, was developed. Butyl alcohol, when mixed with ethyl acetate, greatly increased the recovery of both levodopa and carbidopa. The addition of PFPA further enhanced recovery for both analytes. Sodium metabisulfite, an antioxidant, was used to stabilize levodopa and carbidopa in rat plasma. The method was validated in the ranges of 50-10,000ng/mL and 25-5000ng/mL for levodopa and carbidopa, respectively, using levodopa-d3 and carbidopa-d3 as internal standards. The validated method was successfully applied to analyze rat plasma samples from in-life studies.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Perfluoroalkyl acids in the water cycle from a freshwater river basin to coastal waters in eastern China

Authors: Zhu, X; Jin, L; Yang, J; Wu, J; Zhang, B; Zhang, X; Yu, N; Wei, S; Wu, J; Yu, H (2017) Chemosphere 168:390-398. HERO ID: 3860313

[Less] The distribution of perfluoroalkyl acids (PFAAs), one class of persistent organic pollutants, in groundwater, . . . [More] The distribution of perfluoroalkyl acids (PFAAs), one class of persistent organic pollutants, in groundwater, especially in confined aquifers remains poorly understood. In this study, we investigated the occurrence of 12 PFAAs through a water cycle from the Huai River Basin to the Yellow Sea, including confined aquifers, unconfined aquifers, rivers, and coastal waters. We found the ubiquity of PFAAs in all types of samples, including those from confined aquifers (2.7-6.8 ng/L). Perfluorooctane sulfonate (PFOS) and perfluorooctanoic acid (PFOA) were the major PFAAs in all samples, accounting for an average of 49.1% (0.8-84.8%) and 33.3% (6.3-92.2%) of total PFAAs, respectively. Comparing the concentration of PFOA with that of PFOS, we found a higher concentration of PFOA in rivers and a higher concentration of PFOS in confined aquifers. Short-chain perfluoropentanoic acid accounted for an average of 10.3% (1.9-24.6%) of total PFAAs in rivers and coastal waters. Branched isomers of both PFOA and PFOS were detected in most samples (36/42 and 39/42, respectively). One-way analysis of variance indicated a significant difference in the profiles of PFAAs among the different types of water samples. Principal component analysis suggested that rainwater and recent uses of PFAAs could be the major sources of PFAAs in confined aquifers, while recent and current uses of PFAAs could be the major source of PFAAs in unconfined aquifers, rivers and coastal waters. The risk quotients of PFOA and PFOS in groundwater and rivers were 2-3 orders of magnitude lower than unity, indicating no immediate risks via drinking water consumption.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Poly(HEMA-co-HEMA-PFPA): Synthesis and preparation of stable micelles encapsulating imaging nanoparticles

Authors: Sundhoro, M; Park, J; Jayawardana, KW; Chen, X; Jayawardena, HSN; Yan, M (2017) Journal of Colloid and Interface Science 500:1-8. HERO ID: 3860379

[Less] We report the preparation of stable micelles from random copolymers of 2-hydroxyethyl methacrylate (HEMA) . . . [More] We report the preparation of stable micelles from random copolymers of 2-hydroxyethyl methacrylate (HEMA) and perfluorophenyl azide (PFPA)-derivatized HEMA (HEMA-PFPA). The copolymers were synthesized by RAFT polymerization at room temperature under mild conditions without affecting the azide functionality. Upon addition of water to the copolymer solution in DMSO, the random copolymers self-assembled into micelles even at the percentage of HEMA-PFPA as low as 4.5%. The size of the micelles can be controlled by the molecular weight and the concentration of the copolymer, and the percentage of HEMA-PFPA in the copolymer. In addition, iron oxide nanoparticles and quantum dots were successfully encapsulated into the micelles with high encapsulation efficiency (∼80%). These nanoparticles, which were hydrophobic and formed agglomerates in water, became fully dispersed after encapsulating into the micelles. The micelles were stable and the size remained unchanged for at least 6months.

Technical Report
Technical Report

Safety data sheet. Version 4.4. Perfluoropentanoic acid. Product number 396575. CAS-No. 2706-90-3

Author: Sigma-Aldrich (2017) HERO ID: 3980885


Technical Report
Technical Report

B21567 Perfluoropentanoic acid, 97%. CAS number 2706-90-3

Author: Alfa Aesar (2017) Thermo Fisher Scientific. HERO ID: 3980888


The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Efficient photochemical decomposition of trifluoroacetic acid and its analogues with electrolyzed sulfuric acid

Authors: Hori, H; Manita, Ryo; Yamamoto, K; Kutsuna, S; Kato, M (2017) Journal of Photochemistry and Photobiology A: Chemistry 332:167-173. HERO ID: 3468926

[Less] Electrolyzed sulfuric acid is a new chemical reagent prepared by electrolysis of aqueous sulfuric acid. . . . [More] Electrolyzed sulfuric acid is a new chemical reagent prepared by electrolysis of aqueous sulfuric acid. In the present work, the concentrations of the oxidizing species (S2O82-, HSO5-, and H2O2) present in electrolyzed sulfuric acid were quantified, and photochemical decomposition of trifluoroacetic acid (CF3COOH, TFA), pentafluoropropionic acid (C2F5COOH, PFPA), and heptafluorobutyric acid (C3F7COOH, HFBA) in water with electrolyzed sulfuric acid was investigated. TFA was efficiently decomposed to F- and CO2 with electrolyzed sulfuric acid under irradiation with UV-visible light (220-460 nm), and the quantum yield for TFA decomposition under irradiation with 254-nm monochromatic light was measured to be 0.20. Among the oxidizing species present in the electrolyzed sulfuric acid, S2O82- played the dominant role in the photochemical reactions, and the combination of S2O82- and highly acidic conditions (pH similar to 1.0) resulting from the coexistence of H2SO4 was the main reason for the high reactivity. PFPA and HFBA were also efficiently decomposed with electrolyzed sulfuric acid. The pseudo-first-order rate constants for the decrease in the amounts of these substrates were 1.6-1.9 times as high as those for conventional decomposition reactions with the potassium salt of S2O82-. (C) 2016 Elsevier B.V. All rights reserved.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

The use of carbon adsorbents for the removal of perfluoroalkyl acids from potable reuse systems

Authors: Inyang, M; Dickenson, ERV (2017) Chemosphere 184:168-175. HERO ID: 3858250

[Less] Bench- and pilot-scale sorption tests were used to probe the performance of several biochars at removing . . . [More] Bench- and pilot-scale sorption tests were used to probe the performance of several biochars at removing perfluoroalkyl acids (PFAA) from field waters, compared to granular activated carbon (GAC). Screening tests using organic matter-free water resulted in hardwood (HWC) (Kd = 41 L g(-1)) and pinewood (PWC) (Kd = 49 L g(-1)) biochars having the highest perfluorooctanoic acid (PFOA) removal performance that was comparable to bituminous coal GAC (Kd = 41 L g(-1)). PWC and HWC had a stronger affinity for PFOA sorbed in Lake Mead surface water (KF = 11 mg((1-n)) L(n) g(-1)) containing a lower (2 mg L(-1)) dissolved organic carbon (DOC) concentration than in a tertiary-filtered wastewater (KF = 8 mg((1-n)) L(n) g(-1)) with DOC of 4.9 mg L(-1). A pilot-scale study was performed using three parallel adsorbers (GAC, anthracite, and HWC biochar) treating the same tertiary-filtered wastewater. Compared to HWC, and anthracite, GAC was the most effective in mitigating perfluoropentanoic acid (PFPnA), perfluorohexanoic acid (PHxA), PFOA, perfluorooctane sulfonic acid (PFOS), and DOC (45-67% removed at 4354 bed volumes) followed by HWC, and then anthracite. Based on bench- and pilot-scale results, shorter-chain PFAA [perfluorobutanoic acid (PFBA), PFPnA, or PFHxA] were more difficult to remove with both biochar and GAC than the longer-chain, PFOS and PFOA.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Highly efficient and stable Zr-doped nanocrystalline PbO2 electrode for mineralization of perfluorooctanoic acid in a sequential treatment system

Authors: Xu, Z; Yu, Y; Liu, H; Niu, J (2017) Science of the Total Environment 579:1600-1607. HERO ID: 3858263

[Less] Zr-doped nanocrystalline PbO2 (Zr-PbO2) film electrodes were prepared at different bath temperatures. . . . [More] Zr-doped nanocrystalline PbO2 (Zr-PbO2) film electrodes were prepared at different bath temperatures. The Zr-PbO2 electrode doped at 75°C (75-Zr-PbO2) featured high oxygen evolution overpotential, large effective area and good electrocatalytic performance. The oxygen evolution potential and the effective area of 75-Zr-PbO2 achieved 1.91V (vs. SCE) and 9.1cm(2), respectively. The removal efficiency and the defluorination ratio of PFOA reached 97.0% and 88.1% after 90min electrolysis. The primary mineralization products (i.e., F(-) and intermediates) and their change trends were determined. The 75-Zr-PbO2 electrode was introduced to sequentially treat the PFOA wastewater. In an 116h of 75-Zr-PbO2 electrocatalysis sequential process, the PFOA, PFHpA, PFHxA, PFPeA, PFBA, PFPrA, TFA, and TOC concentrations were reduced to below 30, 2.5, 1.3, 1.0, 0.5, 0.2, 0.1, and 9mgL(-1), respectively, demonstrating the promising application of the sequential treatment system for the treatment of PFOA wastewater.

The "refereed" or "peer review" status of a journal comes from the Ulrichsweb Global Serials Directory (http://ulrichsweb.serialssolutions.com/), as supplied by the publisher. The term refers to the system of critical evaluation of manuscripts/articles by professional colleagues or peers. The content of refereed publications is sanctioned, vetted, or otherwise approved by a peer-review or editorial board. The peer-review and evaluation system is utilized to protect, maintain, and raise the quality of scholarly material published in serials. Publications subject to the referee process are assumed, then, to contain higher quality content than those that are not.
Peer Reviewed Journal Article

Serum concentrations of per- and poly-fluoroalkyl substances and factors associated with exposure in the general adult population in South Korea

Authors: Lee, JH; Lee, CK; Suh, CH; Kang, HS; Hong, CP; Choi, SN (2017) International Journal of Hygiene and Environmental Health 220:1046-1054. HERO ID: 3858472

[Less] Per- and polyfluoroalkyl substances (PFASs) are ubiquitous contaminants found worldwide, including in . . . [More] Per- and polyfluoroalkyl substances (PFASs) are ubiquitous contaminants found worldwide, including in South Korea. As a result, they are frequently detected in Koreans. However, there is limited representative data and information on potential sources in Korea. Therefore, we measured the serum concentrations of ten PFASs in nationally representative samples of the Korean population (n=1874, 18-69 years) and evaluated the factors associated with their exposure. Serum PFOS, PFDA, PFOA, and PFNA were detected in nearly all participants (83.1-99.9%). However, serum PFPA, PFHxA, and PFHpA were almost undetected (<0.5% of participants). PFOS had the highest population-weighted geometric mean of 10.23ng/mL (95% CI: 9.99-10.47), which was followed by PFOA with 2.85ng/mL (95% CI: 2.73-2.97) and PFDA with 2.17ng/mL (95% CI: 2.12-2.23). PFNA, PFDA, PFHxS, PFOA, and PFOS concentrations were higher in males (p<0.001) and older adults (p<0.001). PFNA was higher in those who used wax, polish, and water-resistant materials (adjusted proportional change=1.14; 95% CI: 1.08-1.22), and those who ate cooked fish (1.16; 95% CI: 1.03-1.31) compared to those who ate nearly no fish. PFDA was higher in those who used herbicides and pesticides (1.05; 95% CI: 1.02-1.09), those who drank beverages in a plastic bag on a daily basis (1.10; 95% CI: 1.03-1.19), and those who ate raw fish (1.15; 95% CI: 1.03-1.29) or cooked fish (1.13; 95% CI: 1.05-1.23) compared to those who ate nearly no fish. PFHxS was higher in those who used traditional Korean health supplement foods (1.08; 95% CI: 1.01-1.15). PFOA was higher in those who used plastic wrap in a microwave daily or weekly (1.08; 95% CI: 1.00-1.16), and those who used disposable paper cups (1.07; 95% CI: 1.01-1.13). PFOS was lower in underweight participants (0.84; 95%CI: 0.75-0.93) compared to those who were obese, and higher in those who exercised regularly (1.08; 95% CI: 1.03-1.14) or irregularly (1.06, 95% CI: 1.01-1.12) compared to those who did not exercise. Subjects who used severely damaged Teflon appliances had lower concentrations of PFOA (0.78, 95% CI: 0.65-0.95), while regular use of Gore-Tex goods was related to higher PFNA (1.15, 95% CI: 1.03-1.28) and PFDA (1.11; 95% CI: 1.02-1.20) levels. These findings suggest that most Koreans are frequently exposed to PFASs, and that serum concentrations of PFASs vary with age, sex, and exposure factors.