A novel approach to bar adsorptive microextraction: Cork as extractor phase for determination of benzophenone, triclocarban and parabens in aqueous samples

Dias, Adriana Neves; Silva, Ana Cristine da; Simão, Vanessa; Merib, Josias; Carasek, Eduardo

doi:10.1016/j.aca.2015.07.011

Cited by 56 publications

(29 citation statements)

References 35 publications

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“…Moreover, very low consumption of organic solvents was necessary which emphasizes the environmentally‐friendly aspects associated with the methodology proposed. The method proposed also exhibited satisfactory limits of quantification (LOQ), with similar values than obtained in studies previously reported . Moreover, the increase in the sensitivity of the DPX procedure can be verified in Supporting Information Figure S9, when chromatograms obtained from an extraction in ultrapure water sample (A) and from the direct injection (B) both at concentration of 100 μg/L for each analyteare shown.…”

Section: Resultssupporting

confidence: 81%

A natural and renewable biosorbent phase as a low‐cost approach in disposable pipette extraction technique for the determination of emerging contaminants in lake water samples

Morés

Silva

Merib

et al. 2019

J of Separation Science

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This study proposes an efficient analytical methodology using a biosorbent (cork) as an extraction phase in disposable pipette extraction technique for the rapid determination of the emerging contaminants methyl paraben, ethyl paraben, benzophenone, 3‐(4‐methylbenzylidene) camphor and 2‐(ethylhexyl)‐4‐(dimethylamino) benzoate in lake water samples using high‐performance liquid chromatography with diode array detection. The optimized conditions were comprised of 800 μL of sample, three cycles of 30 s each for the extraction, pH 6, addition of 30% w/v of NaCl. For the desorption step, the optimized desorption conditions were achieved with 100 μL of a mixture comprised of 50% methanol and 50% acetonitrile v/v, using one cycle of 30 s. Excellent analytical performance was achieved with limits of detection of 0.6 μg/L for methyl paraben to 1.4 μg/L for 3‐(4‐methylbenzylidene) camphor, and the limit of quantitation varied from 2 μg/L for methyl paraben to 4.3 μg/L 3‐(4‐methylbenzylidene) camphor, respectively. The correlation coefficients ranged from 0.9962 for ethyl paraben to 0.9980 for methyl paraben. The method accuracy varied from 71–132%, and the intraday precision ranged from 3 to 23% (n = 3) and interday from 9 to 23% (n = 9). The robustness was evaluated through Youden and Lenth's methods and indicated no significant variations in the results.

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Section: Resultssupporting

confidence: 81%

A natural and renewable biosorbent phase as a low‐cost approach in disposable pipette extraction technique for the determination of emerging contaminants in lake water samples

Morés

Silva

Merib

et al. 2019

J of Separation Science

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“…6 Cork has showed good sorption performance with regard to polycyclic aromatic hydrocarbons and organochlorine pesticides using the SPME technique and it has also produced good results for the extraction of parabens, benzophenone and triclocarban using the BAµE technique. 3,19,20 According to previous studies, when cork is thermally treated, its surface is constituted by lignin and suberin, conferring to cork the possibility of making different chemical interactions with organic compounds, in addition, a physical interaction of adsorption is possible due to the porous structure of this sorbent coating. 21,22 These promising results have prompted the need for new studies on the cork extraction capacity in microextraction procedures, considering that this material is of natural origin and is renewable and biodegradable.…”

Section: Introductionmentioning

confidence: 99%

“…The use of sunscreens and other personal care products with UV filters may prevent or minimize the harmful effects of solar radiation to the human skin because these filters absorb the UV light. [1][2][3] In recent decades, interest regarding the determination of levels of ultraviolet filters in environmental samples has increased considerably due to their presence in aquatic environment. Direct action, such as swimming in and sunbathing beside rivers, as well as indirect actions such as showering and washing clothes, can lead to the input of these compounds to the aquatic environment.…”

Section: Introductionmentioning

confidence: 99%

“…8 Prior to chromatographic analysis, a sample preparation technique is used to remove or reduce potential interferents from the matrix and also to concentrate the analytes. Different sample preparation techniques have been employed for the determination of ultraviolet filters in water samples, such as ultrasound-assisted e m u l s i fi c a t i o n m i c r o ex t r a c t i o n ( U S A E M E ) , 7 dispersive liquid-liquid microextraction (DLLME), [9][10][11] stir-bar sorptive-extraction (SBSE), 12 stir-bar sorptive-dispersive microextraction (SBSDµE), 13,14 bar adsorptive microextraction (BAµE) 3 and solid-phase microextraction (SPME). [15][16][17] In this study, cork fiber was proposed for use in the determination of two ultraviolet filters in river water samples, 3-(4-methylbenzylidene)camphor and 2-ethylhexyl 4-(dimethylamino)benzoate, which are from different Exploiting Cork as Biosorbent Extraction Phase for Solid-Phase Microextraction J. Braz.…”

Section: Introductionmentioning

confidence: 99%

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Exploiting Cork as Biosorbent Extraction Phase for Solid-Phase Microextraction to Determine 3-(4-Methylbenzylidene)camphor and 2-Ethylhexyl 4-(Dimethylamino)benzoate in River Water by Gas Chromatography-Mass Spectrometry

Silva¹,

Dias²,

Carasek³

2017

J. Braz. Chem. Soc.

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In this study, a method for the determination of 3-(4-methylbenzylidene)camphor (4-MBC) and 2-ethylhexyl 4-(dimethylamino)benzoate (OD-PABA) in river water samples employing cork as the SPME (solid-phase microextraction) fiber was developed. The extraction parameters optimized were pH, ionic strength and extraction time and temperature. For the extraction step, the sample pH was studied in univariate experiments while the extraction time, temperature and ionic strength were evaluated using a central composite design. The optimal extraction conditions were sample pH 4.0, extraction time 70 min, sample temperature 80 °C and sodium chloride concentration 6% (m v , respectively. The linear correlation coefficients were greater than 0.97 for both analytes and the developed method showed recovery values between 67 and 107%. In an evaluation of the fiber-to-fiber reproducibility (fibers produced by different analysts), the relative standard deviation (RSD) was lower than 11% (n = 6).

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“…Embora em alguns trabalhos que avaliam parabenos o aumento da força iônica da amostra favoreça a extração desses compostos (60,74), isso não foi observado no presente caso. Uma possível explicação a esse fato pode ser atribuído aos íons de NaCl também serem adsorvidos na superfície do dispositivo de SBSE, o que pode dificultar a adsorção dos parabenos avaliados devido a formação de uma camada de água no dispotivo.…”

Section: Otimização Das Condições De Extração Por Sbseunclassified

Emprego de materiais baseados em grafeno como sorventes em técnicas modernas de preparo de amostra

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Modern sample preparation techniques have been applied to the determination of different compounds class in several matrices. These techniques might be divided into two groups, solvent and sorbent based, the last being the goal of this work. Nowadays, among the most studied materials the graphene based ones has been highlighted due to its physical chemical properties favorable to sorption process of a variety of interested compounds. The present work shows possibilities to employ graphene based materials in the follow sample preparation techniques: microextraction by packed sorbent (MEPS), "on-line" extraction, and stir bar sorptive extraction (SBSE). For MEPS, the materials graphene oxide and graphene supported on aminopropyl silica through covalent bounds were synthesized. These materials were employed as sorbent to determine parabens in water samples. The developed method showed limits of quantification (LOQ) ranging from 0,2 a 0,3 µg/L, coefficients of variation (CV) < 19,2% and accuracy ranging from 82,3 à 119,2%. The synthetized materials used in MEPS were also used and compared to an "on-line" method employing an extraction column packed with them. The "on-line" method showed LOQ of 0,5 µg/L, accuracy ranging from 88,2 to 107,2 and CV < 16%. The comparison between packed column with graphene and graphene oxide supported on aminopropyl silica showed that graphene had a higher retention for parabens with high Log Kow. The method developed with SBSE bars coated with graphene showed LOQ ranging from 2 to 8 µg/L, accuracy ranging from 81,9 to 126,3% and CV < 30%. Moreover, the employment of graphene oxide and graphene synthetized by changing some synthesis conditions and testing these materials to extract triazines, sulfonamides, and non-steroidal antiinflammatory drugs was also evaluated. In addition, are presented the preliminary tests regarding to a new extraction mode, similar to SBSE. These tests were done for parabens and non-steroidal anti-inflammatory drugs.

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A novel approach to bar adsorptive microextraction: Cork as extractor phase for determination of benzophenone, triclocarban and parabens in aqueous samples

Cited by 56 publications

References 35 publications

A natural and renewable biosorbent phase as a low‐cost approach in disposable pipette extraction technique for the determination of emerging contaminants in lake water samples

A natural and renewable biosorbent phase as a low‐cost approach in disposable pipette extraction technique for the determination of emerging contaminants in lake water samples

Exploiting Cork as Biosorbent Extraction Phase for Solid-Phase Microextraction to Determine 3-(4-Methylbenzylidene)camphor and 2-Ethylhexyl 4-(Dimethylamino)benzoate in River Water by Gas Chromatography-Mass Spectrometry

Emprego de materiais baseados em grafeno como sorventes em técnicas modernas de preparo de amostra

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