A structural and thermal investigation of the inclusion of parabens in heptakis(2,6-di-O-methyl)cyclomaltoheptaose

Vries, Elise J. C. de; Caira, Mino R.

doi:10.1016/j.carres.2008.06.014

Cited by 11 publications

(3 citation statements)

References 13 publications

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“…14 Cyclodextrin (CD) has been extensively applied in analytical elds for its enantioselective properties, 15 as a modier in capillary electrophoresis, 16 as a chirality selector 17 and as a co-modier in mobile phase techniques. 18 The fact that parabens can form an inclusion complex with b-cyclodextrin (b-CD), [19][20][21] led us to choose to investigate the efficiency of b-CD as a modier in IL-ATPS to determine parabens in environmental water samples.…”

Section: Introductionmentioning

confidence: 99%

Extraction and determination of parabens in water samples using an aqueous two-phase system of ionic liquid and salts with beta-cyclodextrin as the modifier coupled with high performance liquid chromatography

2014

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In this study, two methods have been applied to the extraction of parabens from aqueous solution these are ionic liquid based aqueous two-phase extraction (IL-ATPS) and ionic liquid based aqueous two-phase extraction in the presence of b-cyclodextrin (b-CD) as the modifier (IL-bCD-ATPS). The IL-bCD-ATPS method consists of 1-butyl-3-methylimidazolium chloride, [C 4 mim][Cl] and b-CD. It is a new, green and simple extraction technique coupled with reversed-phase high performance liquid chromatography (RP-HPLC) that was applied to optimize conditions for the phase separation of parabens in water samples.The IL-bCD-ATPS method shows higher losses for water content compared to the IL-ATPS method resulting in a higher preconcentration factor and a higher distribution coefficient. A lower limit of detection of parabens in water samples was demonstrated by the IL-bCD-ATPS method. To conclude, the IL-bCD-ATPS method is superior to the IL-ATPS method for the determination of parabens in water samples. It is an economically viable approach when using b-CD because it improves the performance of the ATPS method dramatically. In addition, this chemical is cheap and non-toxic to the environment.

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Section: Introductionmentioning

confidence: 99%

Extraction and determination of parabens in water samples using an aqueous two-phase system of ionic liquid and salts with beta-cyclodextrin as the modifier coupled with high performance liquid chromatography

2014

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“…The methods to identify crystal structure or polymorph were not limited to the above examples. Other reported technologies includes thermal gravimetric analysis (TGA) [87], nuclear magnetic resonance (NMR) [86], ultraviolet Spectrophotometer (US) [88], and Atomic-force microscopy (AFM) [89][90][91][92][93][94][95], together with other technologies listed in Table 2. Figure 11 Microscope and SEM images of BP sandwich crystals and the pores inside crystals [56,77]…”

Section: Crystal Structures and Polymorphismmentioning

confidence: 99%

Review on Life Cycle of Parabens: Synthesis, Degradation, Characterization and Safety Analysis

Yang

Zhang

2018

COC

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In this review, we show the life cycle of parabens, commonly used preservatives that exist in nature and commercial products. Typical synthetic methods to produce parabens, and a set of complimentary characterization techniques to monitor the composition of parabens are also highlighted. These includes solid state analysis using Scanning Electron Microscope (SEM), Differential Scanning Calorimetry (DSC) and X-Ray Diffraction (XRD), in-situ monitoring of crystallization process using Focused Beam Reflectance Measurement (FBRM), Particle Vision Measurement (PVM), quantitative detection via High Performance Liquid Chromatography (HPLC), and Gas Chromatography (GC). An improved understanding of the overall physical, biophysical and chemical properties of parabens and their life cycle, summarized in this article, are vital for the safety control and extensive applications of relevant products in food, cosmetic and pharmaceutical industries.

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“…The crystal structures of BPN (CSD refcode: UDOMIL) (Yang & Rasmuson, 2013) and its clathrate hydrate (CSD refcode: VOFKIL) have been reported in the literature (de Vries & Caira, 2008). In UDOMIL, the BPN molecule exhibits a planar conformation except for the terminal ethyl moiety of butyl ester group which is in a cis orientation with respect to the ester group.…”

Section: Database Surveymentioning

confidence: 99%

Crystal structure of the co-crystal butylparaben–isonicotinamide (1/1)

2016

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A structural and thermal investigation of the inclusion of parabens in heptakis(2,6-di-O-methyl)cyclomaltoheptaose

Cited by 11 publications

References 13 publications

Extraction and determination of parabens in water samples using an aqueous two-phase system of ionic liquid and salts with beta-cyclodextrin as the modifier coupled with high performance liquid chromatography

Extraction and determination of parabens in water samples using an aqueous two-phase system of ionic liquid and salts with beta-cyclodextrin as the modifier coupled with high performance liquid chromatography

Review on Life Cycle of Parabens: Synthesis, Degradation, Characterization and Safety Analysis

Crystal structure of the co-crystal butylparaben–isonicotinamide (1/1)

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