1
|
Preparation and performance of WO3/rGO modified carbon sensor for enhanced electrochemical detection of triclosan. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141010] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
2
|
Su YL, You HC, Cheng SH, Lin CY. Fabrication of bacteriochlorin shell/gold core nanoparticles for the sensitive determination of trichlosan using differential pulse voltammetry. Anal Chim Acta 2020; 1123:44-55. [PMID: 32507239 DOI: 10.1016/j.aca.2020.04.070] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 04/15/2020] [Accepted: 04/28/2020] [Indexed: 01/17/2023]
Abstract
The triclosan contamination in daily life has attracted great attention, and there is rare electroanalytical assay based on π-system dyes. In this work, a facile preparation and electroanalytical application of an organic dispersion containing bacteriochlorin dyes (LS11) and gold nanoparticles (AuNPs) was proposed. The organic-inorganic hybrid nanocomposites were characterized by transmission electron microscope (TEM) showing a core-shell structure with a uniform layer of dye molecules. The as-prepared nanocomposites were successfully coated onto glassy carbon electrodes, and the surface characteristics of the top most layer of the modified electrodes were examined by atomic force microscopy (AFM), field emission scanning electron microscopy (FE-SEM) and water contact angle experiments. The nanocomposite film-modified electrodes exhibited good electrochemical activity towards oxidation of triclosan. The oxidation of adsorbed triclosan occurred at a reduced overpotential, and the anodic current responses under a pre-concentration step prior to the potential scan were used for quantitative analysis. A good linear relationship from 0.01 μM to 0.5 μM was obtained using differential pulse voltammetry. The sensitivity and detection limit (S/N = 3) were 23.69 μA μM-1 and 0.03 μM, respectively. The proposed assay was applied to detect triclosan in two personal hygiene products using standard addition method, and the results showed good recoveries that ranged from 96.6% to 101.5% and from 99.3% to 103.8% for a toothpaste sample and a hand wash sample, respectively. A reference HPLC-UV method was used to evaluate the proposed electroanalytical method, and a good agreement was achieved.
Collapse
Affiliation(s)
- Ya-Ling Su
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou Hsien, Taiwan, 545
| | - Huei-Chi You
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou Hsien, Taiwan, 545
| | - Shu-Hua Cheng
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou Hsien, Taiwan, 545.
| | - Ching-Yao Lin
- Department of Applied Chemistry, National Chi Nan University, Puli, Nantou Hsien, Taiwan, 545.
| |
Collapse
|
3
|
Usal M, Regnault C, Veyrenc S, Couturier K, Batandier C, Bulteau AL, Lejon D, Combourieu B, Lafond T, Raveton M, Reynaud S. Concomitant exposure to benzo[a]pyrene and triclosan at environmentally relevant concentrations induces metabolic syndrome with multigenerational consequences in Silurana (Xenopus) tropicalis. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 689:149-159. [PMID: 31271984 DOI: 10.1016/j.scitotenv.2019.06.386] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 06/18/2019] [Accepted: 06/23/2019] [Indexed: 06/09/2023]
Abstract
Numerous studies suggest that amphibians are highly sensitive to endocrine disruptors (ED) but their precise role in population decline remains unknown. This study shows that frogs exposed to a mixture of ED throughout their life cycle, at environmentally relevant concentrations, developed an unexpected metabolic syndrome. Female Silurana (Xenopus) tropicalis exposed to a mixture of benzo[a]pyrene and triclosan (50 ng·L-1 each) from the tadpole stage developed liver steatosis and transcriptomic signature associated with glucose intolerance syndrome, and pancreatic insulin hyper secretion typical of pre-diabetes. These metabolic disorders were associated with delayed metamorphosis and developmental mortality in their progeny, both of which have been linked to reduced adult recruitment and reproductive success. Indeed, F1 females were smaller and lighter and presented reduced reproductive capacities, demonstrating a reduced fitness of ED-exposed Xenopus. Our results confirm that amphibians are highly sensitive to ED even at concentrations considered to be safe for other animals. This study demonstrates that ED might be considered as direct contributing factors to amphibian population decline, due to their disruption of energetic metabolism.
Collapse
Affiliation(s)
- Marie Usal
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | - Christophe Regnault
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France
| | - Sylvie Veyrenc
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France.
| | | | | | - Anne-Laure Bulteau
- Institut de Génomique Fonctionnelle de Lyon, Univ. Lyon 1, CNRS UMR5242, Ecole Normale Supérieure de Lyon, 69000 Lyon, France.
| | - David Lejon
- Rovaltain Research Company, F26300 Alixan, France.
| | | | - Thomas Lafond
- Centre de Ressources Biologiques Xénopes, Univ. Rennes 1, CNRS, UMS 3387 Rennes, France.
| | - Muriel Raveton
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France.
| | - Stéphane Reynaud
- Univ. Grenoble-Alpes, Univ. Savoie Mont Blanc, CNRS, LECA, 38000 Grenoble, France.
| |
Collapse
|
4
|
Aminu N, Chan SY, Khan NH, Toh SM. Concurrent determination of triclosan and flurbiprofen by high-performance liquid chromatography in simulated saliva and its application in dental nanogel formulation. ACTA CHROMATOGR 2018. [DOI: 10.1556/1326.2017.00286] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Nafiu Aminu
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
- Department of Pharmaceutics and Pharmaceutical Microbiology, Faculty of Pharmaceutical Sciences, Usmanu Danfodiyo University, P.M.B. 2346, Sokoto ,Nigeria
| | - Siok-Yee Chan
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Nasir Hayat Khan
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| | - Seok-Ming Toh
- Discipline of Pharmaceutical Technology, School of Pharmaceutical Sciences, Universiti Sains Malaysia, 11800 USM, Penang, Malaysia
| |
Collapse
|
5
|
Fabrication of one dimensional CNTs/Fe3O4@PPy/Pd magnetic composites for the accumulation and electrochemical detection of triclosan. J Electroanal Chem (Lausanne) 2018. [DOI: 10.1016/j.jelechem.2018.04.026] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
6
|
Feng S, Wei X, Zhong L, Li J. A Novel Molecularly Imprinted Photoelectrochemical Sensor Based on g-C3
N4
-AuNPs for the Highly Sensitive and Selective Detection of Triclosan. ELECTROANAL 2017. [DOI: 10.1002/elan.201700514] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shasha Feng
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, College of Chemistry and Bioengineering; Guilin University of Technology; Guilin 541004 China
| | - Xiaoping Wei
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, College of Chemistry and Bioengineering; Guilin University of Technology; Guilin 541004 China
| | - Li Zhong
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, College of Chemistry and Bioengineering; Guilin University of Technology; Guilin 541004 China
| | - Jianping Li
- Guangxi Key Laboratory of Electrochemical and Magnetochemical Function Materials, Guangxi Colleges and Universities Key Laboratory of Food Safety and Detection, College of Chemistry and Bioengineering; Guilin University of Technology; Guilin 541004 China
| |
Collapse
|
7
|
Chai L, Chen A, Luo P, Zhao H, Wang H. Histopathological changes and lipid metabolism in the liver of Bufo gargarizans tadpoles exposed to Triclosan. CHEMOSPHERE 2017; 182:255-266. [PMID: 28500970 DOI: 10.1016/j.chemosphere.2017.05.040] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2017] [Revised: 04/09/2017] [Accepted: 05/06/2017] [Indexed: 06/07/2023]
Abstract
In the current study, the adverse effects of TCS on liver health of B. gargarizans tadpoles were assessed. B. gargarizans larvae were exposed to TCS at 0, 10, 30, 60, and 150 μg L-1 from Gosner stage 3 until metamorphic climax. The hepatosomatic index (HSI), hepatic histological and ultrastructural features, and transcript levels of genes associated with detoxification and oxidative stress as well as lipid metabolism in the livers were determined. Exposure to 150 μg L-1 TCS resulted in increased HSI of tadpoles at metamorphic climax. Histological changes characterized by an increase in the number of melanomacrophage, nucleus pyknosis, and deposition of collagen fibers were observed in liver at 60 and 150 μg L-1 TCS. Moreover, marked ultrastructural alterations including high electron dense in mitochondrial matrix and lipid accumulation were also observed. In addition, abundances of transcripts of Cu/Zn superoxide dismutase (SOD), phospholipid hydroperoxide glutathione peroxidase (PHGPx), and heat shock protein 90 (HSP90) were decreased in larvae exposed to 60 and 150 μg L-1 TCS, while transcript level of HSP90 was increased at 30 μg L-1 TCS. Also, abundances of transcripts of acetyl-CoA carboxylase (ACC), carnitine palmitoyltransferase 2 (CPT2), peroxisome proliferator-activated receptor alpha (PPARa), fatty acid elongase 1 (FAE), sterol carrier protein 2 (SCP) were significantly lesser in larvae exposed to 60 and 150 μg L-1 TCS. Overall, TCS at high levels induced histopathological changes in the liver of B. gargarizans tadpoles. This might have been due to the alteration of oxidative stress-related genes and lipid metabolism-related genes expression levels.
Collapse
Affiliation(s)
- Lihong Chai
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064 China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710064 China
| | - Aixia Chen
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064 China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710064 China
| | - Pingping Luo
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710064 China; Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710064 China
| | - Hongfeng Zhao
- College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China
| | - Hongyuan Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an 710062, China.
| |
Collapse
|
8
|
Liu S, Thompson SL, Stark H, Ziemann PJ, Jimenez JL. Gas-Phase Carboxylic Acids in a University Classroom: Abundance, Variability, and Sources. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:5454-5463. [PMID: 28420232 DOI: 10.1021/acs.est.7b01358] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Gas-phase carboxylic acids are ubiquitous in ambient air, yet their indoor occurrence and abundance are poorly characterized. To fill this gap, we measured gas-phase carboxylic acids in real-time inside and outside of a university classroom using a high-resolution time-of-flight chemical ionization mass spectrometer (HRToF-CIMS) equipped with an acetate ion source. A wide variety of carboxylic acids were identified indoors and outdoors, including monoacids, diacids, hydroxy acids, carbonyl acids, and aromatic acids. An empirical parametrization was derived to estimate the sensitivity (ion counts per ppt of the analytes) of the HRToF-CIMS to the acids. The campaign-average concentration of carboxylic acids measured outdoors was 1.0 ppb, with the peak concentration occurring in daytime. The average indoor concentration of carboxylic acids was 6.8 ppb, of which 87% was contributed by formic and lactic acid. While carboxylic acids measured outdoors displayed a single daytime peak, those measured indoors displayed a daytime and a nighttime peak. Besides indoor sources such as off-gassing of building materials, evidence for acid production from indoor chemical reactions with ozone was found. In addition, some carboxylic acids measured indoors correlated to CO2 in daytime, suggesting that human occupants may contribute to their abundance either through direct emissions or surface reactions.
Collapse
Affiliation(s)
- Shang Liu
- Department of Chemistry & Biochemistry, and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States
| | - Samantha L Thompson
- Department of Chemistry & Biochemistry, and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States
| | - Harald Stark
- Department of Chemistry & Biochemistry, and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States
- Aerodyne Research Inc. , Billerica, Massachusetts 01821, United States
| | - Paul J Ziemann
- Department of Chemistry & Biochemistry, and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States
| | - Jose L Jimenez
- Department of Chemistry & Biochemistry, and Cooperative Institute for Research in Environmental Sciences (CIRES), University of Colorado , Boulder, Colorado 80309, United States
| |
Collapse
|
9
|
Fabrication and characterisation of drug-loaded electrospun polymeric nanofibers for controlled release in hernia repair. Int J Pharm 2017; 517:329-337. [DOI: 10.1016/j.ijpharm.2016.12.022] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2016] [Revised: 12/08/2016] [Accepted: 12/10/2016] [Indexed: 11/20/2022]
|
10
|
Chai L, Wang H, Zhao H, Deng H. Chronic effects of triclosan on embryonic development of Chinese toad, Bufo gargarizans. ECOTOXICOLOGY (LONDON, ENGLAND) 2016; 25:1600-1608. [PMID: 27599820 DOI: 10.1007/s10646-016-1715-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/17/2016] [Indexed: 06/06/2023]
Abstract
Triclosan (TCS) is commonly used worldwide in a range of personal care and sanitizing products. The aim of this study was to evaluate potential effects of TCS exposure on embryonic development of Bufo gargarizans, an endemic frog species in China. Standard Gosner stage 3 B. gargarizans embryos were exposed to 10 ~ 150 μg/L TCS during embryogenesis. Survival, total length, weight, developmental stage, duration of different embryo stages, malformation, and type II and III deiodinase (D2 and D3) expression were measured. Inhibitory effects on embryo developmental stage, total length and weight were found at 30 ~ 150 μg/L TCS. Moreover, the duration of embryonic development was increased at gastrula, neural, circulation, and operculum development stage in TCS-treated groups. In addition, TCS exposure induced morphological malformations in B. gargarizans embryos, which are characterized by hyperplasia, abdominal edema, and axial flexures. Furthermore, our results showed that the expression of D2 in embryos was probably down-regulated at 60 and 150 μg/L TCS, but its spatial expression patterns was not affected by TCS. In summary, our study suggested that TCS exposure not only resulted in delayed growth and development but also caused teratogenic effects in B. gargarizans embryos, and the developmental effects of TCS at high concentrations may be associated with disruption of THs homeostasis. Although further studies are necessary, the present findings could provide a basis for understanding on harmful effects and the potential mechanisms of TCS in amphibian embryos.
Collapse
Affiliation(s)
- Lihong Chai
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710054, China
| | - Hongyuan Wang
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China.
| | - Hongfeng Zhao
- College of Life Sciences, Shaanxi Normal University, Xi'an, 710062, China
| | - Hongzhang Deng
- School of Environmental Science and Engineering, Chang'an University, Xi'an, 710054, China
- Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education, Chang'an University, Xi'an, 710054, China
| |
Collapse
|
11
|
Emerging contaminant determination in water samples by liquid chromatography using a monolithic column coupled with a photodiode array detector. Anal Bioanal Chem 2015; 407:4661-70. [DOI: 10.1007/s00216-015-8666-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 02/26/2015] [Accepted: 03/27/2015] [Indexed: 12/30/2022]
|
12
|
Yola ML, Atar N, Eren T, Karimi-Maleh H, Wang S. Sensitive and selective determination of aqueous triclosan based on gold nanoparticles on polyoxometalate/reduced graphene oxide nanohybrid. RSC Adv 2015. [DOI: 10.1039/c5ra07443f] [Citation(s) in RCA: 154] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
A novel molecular-imprinted electrochemical sensor based on gold nanoparticles decorating polyoxometalate (H3PW12O40)/reduced graphene oxide was developed for determination of trace TCS in wastewater.
Collapse
Affiliation(s)
- Mehmet Lütfi Yola
- Department of Metallurgical and Materials Engineering
- Sinop University
- Sinop
- Turkey
| | - Necip Atar
- Department of Chemical Engineering
- Pamukkale University
- Denizli
- Turkey
| | - Tanju Eren
- Department of Chemical Engineering
- Pamukkale University
- Denizli
- Turkey
| | | | - Shaobin Wang
- Department of Chemical Engineering
- Curtin University
- Perth
- Australia
| |
Collapse
|
13
|
Rapid determination of triclosan in personal care products using new in-tube based ultrasound-assisted salt-induced liquid–liquid microextraction coupled with high performance liquid chromatography-ultraviolet detection. Anal Chim Acta 2013; 767:81-7. [DOI: 10.1016/j.aca.2013.01.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2012] [Revised: 01/02/2013] [Accepted: 01/10/2013] [Indexed: 11/19/2022]
|
14
|
Liu T, Wu D. High-performance liquid chromatographic determination of triclosan and triclocarban in cosmetic products. Int J Cosmet Sci 2012; 34:489-94. [DOI: 10.1111/j.1468-2494.2012.00742.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 07/10/2012] [Indexed: 11/28/2022]
Affiliation(s)
- T. Liu
- China National Cosmetics Quality Supervision & Inspection Center; Beijing; 100094; China
| | - D. Wu
- Key Laboratory of Biomedical Information Engineering of Education Ministry; School of Life Science and Technology; Xi'an Jiaotong University; Xi'an; 710049; China
| |
Collapse
|
15
|
Cabaleiro N, Pena-Pereira F, de la Calle I, Bendicho C, Lavilla I. Determination of triclosan by cuvetteless UV–vis micro-spectrophotometry following simultaneous ultrasound assisted emulsification–microextraction with derivatization: Use of a micellar-ionic liquid as extractant. Microchem J 2011. [DOI: 10.1016/j.microc.2011.05.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
16
|
Lu H, Ma H, Tao G. Spectrophotometric determination of triclosan in personal care products. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2009; 73:854-857. [PMID: 19451017 DOI: 10.1016/j.saa.2009.04.007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2008] [Revised: 03/28/2009] [Accepted: 04/15/2009] [Indexed: 05/27/2023]
Abstract
A spectrophotometric method for the determination of triclosan in personal care products was proposed. It was based on the reaction of sodium nitrite with p-sulfanilic acid in an acidic medium to form diazonium ion, with which triclosan further formed an azo compound in an alkaline medium. The resulting yellow colored product has a maximum absorption at 452 nm. A good linear relationship (r=0.9999) was obtained in the range of 0-30 mg L(-1) triclosan. A detection limit of 0.079 gL(-1) was achieved and the relative standard deviation was 0.24% (n=11) at 14 mg L(-1) triclosan. The proposed method has been applied to the analyses of triclosan in several personal care products and the results were in good agreement with those obtained by high-performance liquid chromatography.
Collapse
Affiliation(s)
- Huihui Lu
- College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, Jiangsu 215123, China
| | | | | |
Collapse
|
17
|
Song S, Song QJ, Chen Z. Online phototransformation-flow injection chemiluminescence determination of triclosan. Anal Bioanal Chem 2007; 387:2917-22. [PMID: 17294174 DOI: 10.1007/s00216-007-1130-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2006] [Revised: 01/10/2007] [Accepted: 01/12/2007] [Indexed: 11/30/2022]
Abstract
A highly selective and sensitive chemiluminescence method for the determination of triclosan is proposed. The method is based on the phototransformation of triclosan to a light-emitting precursor in the presence of fluorescein in alkaline medium and the chemiluminescence reaction is then triggered by strong base or oxidants such as N-bromosuccinimide. Based on this reaction an online phototransformation-flow injection manifold was developed, in which the photoreactor comprises a 150-cm-long x 0.8-mm-i.d. piece of PTFE tubing coiled around a 25-W fluorescent lamp, and the phototransformed products were then injected into a carrier stream of borate buffer. After mixing with the oxidant stream the produced light was detected by a photomultiplier. A wide calibration range from 8.0 x 10(-8) to 1.0 x 10(-4) mol L(-1) was obtained under the optimized conditions, and the detection limit was as low as 5.0 x 10(-8) mol L(-1). The whole process of analysis, including the online phototransformation and subsequent chemiluminescence detection, could be completed in 6 min. Most of the foreign substances tested showed high tolerance levels, and the proposed method was directly applied to the determination of triclosan in toothpaste samples without any pre-separation procedure. Figure Schematic representation of the phototransformation of triclosan and subsequent chemiluminescence reaction.
Collapse
Affiliation(s)
- Shujuan Song
- School of Chemical and Material Engineering, Southern Yangtze University, Wuxi 214122, China
| | | | | |
Collapse
|
18
|
Sequential superheated liquid extraction of pesticides, pharmaceutical and personal care products with different polarity from marine sediments followed by gas chromatography mass spectrometry detection. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2005.07.042] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
19
|
Morales-Muñoz S, Luque-García JL, Ramos MJ, Martínez-Bueno MJ, Castro MDLD. Sequential Automated Focused Microwave-Assisted Soxhlet Extraction of Compounds with Different Polarity from Marine Sediments Prior to Gas Chromatography Mass Spectrometry Detection. Chromatographia 2005. [DOI: 10.1365/s10337-005-0574-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|
20
|
Sanches-Silva A, Sendón-García R, López-Hernández J, Paseiro-Losada P. Determination of triclosan in foodstuffs. J Sep Sci 2005; 28:65-72. [PMID: 15688633 DOI: 10.1002/jssc.200401845] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A reverse-phase high-performance liquid chromatographic (RP-HPLC) method coupled with an ultraviolet detector was developed to determine triclosan which had migrated into foodstuffs from packaging materials. The method includes extraction with hexane, followed by evaporation to dryness and residue re-dissolution in ACN 90%. Chromatographic separation was performed with a Kromasil 100 C18 column (15 cm x 0.4 cm ID, 5 microm particle size) at 30 degrees C and using ACN and water as mobile phases. Regarding recoveries, good results (higher than 83% and lower than 112%) were obtained for the three representative food matrixes selected (orange juice, chicken breast meat, and Gouda cheese).
Collapse
Affiliation(s)
- Ana Sanches-Silva
- Department of Analytical Chemistry, Nutrition and Food Science, Faculty of Pharmacy, University of Santiago de Compostela, E-15782 Santiago de Compostela, Spain
| | | | | | | |
Collapse
|
21
|
Abstract
In order that malaria be successfully contained, it is important that one has a clear understanding of the normal physiology and biochemistry of the parasite essential to its survival in its human host. Until very recently, the conventional approaches to antimalarial chemotherapy have consistently been plagued with the uncanny ability of the parasite to evolve resistance to drugs. The recently discovered plasmodial fatty acid biosynthetic pathway as well as its inhibition by triclosan that classifies it as belonging to type II, provide with a very crucial breakthrough to the crusade against malaria. How triclosan could tilt the balance in favor of the human hosts of the malarial parasite in a malarial condition is discussed.
Collapse
|
22
|
Agüera A, Fernández-Alba AR, Piedra L, Mézcua M, Gómez M. Evaluation of triclosan and biphenylol in marine sediments and urban wastewaters by pressurized liquid extraction and solid phase extraction followed by gas chromatography mass spectrometry and liquid chromatography mass spectrometry. Anal Chim Acta 2003. [DOI: 10.1016/s0003-2670(03)00040-0] [Citation(s) in RCA: 133] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|