Optimization of magnetic stirring assisted dispersive liquid–liquid microextraction of rhodamine B and rhodamine 6G by response surface methodology: Application in water samples, soft drink, and cosmetic products

Ranjbari, Elias; Hadjmohammadi, Mohammad Reza

doi:10.1016/j.talanta.2015.02.051

Cited by 60 publications

(24 citation statements)

References 18 publications

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“…Regarding banned dyes, the majority of studies are focused on the determination of Rhodamine B. Given its genotoxic effects, many methods have been exclusively developed for the analysis of this compound [9,25,27,28,36,38,39], and it will be commented on separately. With the exception of these cases, the current trend is the development of methods for the simultaneous analysis of mixtures of colorants: up to 32 for qualitative analysis [32] or 19 for quantitative analysis [26].…”

Section: Analytical Methodologymentioning

confidence: 99%

“…Finally, two methods based on DLLME have been developed for the determination of Rhodamine B in decorative make-up (lipstick, rouge and nail polish) [27] and Rhodamine B and 6G (CI 45160) in lipstick [28]. The first method [27] is based on the combination of two supramolecular solvents, polar and non-polar, such as THF or decanoic acid.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Although the experimental procedure is considered fast, prior to micro-extraction a step consisting of solving 0.5 g of sample in 10 mL of ethyl alcohol and shaking for 2 h is needed. In the second case, Ranjbari and Hadjmohammadi [28] optimized a method based on magnetic stirring assisted DLLME (MSA-DLLME), using 1-octanol and acetone as extraction and dispersing solvent, respectively. As mentioned before, DLLME needs extraction solvents with higher density than water, which frequently implies the use of toxic organic solvents.…”

Section: Sample Preparationmentioning

confidence: 99%

“…Liquid chromatography coupled to absorbance or mass spectrometry detectors were proposed in all analytical methodologies for the simultaneous determination of mixtures of dyes (Table 3). Due to the capability of dyes to absorb in the UV-Vis spectrum, DAD or UV-Vis detectors were traditionally the preferred detectors [28,[30][31][32]. In recent years, mass spectrometry has become a valuable choice [24,26,29,33,34], given its enhanced selectivity and sensitivity; it is particularly desired in the analysis of banned compounds.…”

Section: Analytical Techniquesmentioning

confidence: 99%

“…Concerning cosmetics, there have been several methods reported in the last 10 years that combine LC and DAD for the quantitative [28,[30][31][32] and qualitative [32] analysis of multiple dyes or that apply direct spectrophotometric measurement when only one dye is considered [9,25,27,35,39] (see Table 4). In these latter methods, good limits of detection were obtained because of the concentration achieved using an extraction technique such as SPE, CPE or DLLME previous to the analysis.…”

Section: Analytical Techniquesmentioning

confidence: 99%

See 4 more Smart Citations

Analysis of Dyes in Cosmetics: Challenges and Recent Developments

2018

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Colour plays a decisive role in the marketing of a cosmetic product. Among thousands of substances used to colour, synthetic dyes are the most widespread in the industry. Their potential secondary effects on human health and different regulatory requirements for their use between the main world markets make analytical control necessary to guarantee the safety of a cosmetic product. However, methodologies for the determination of dyes in cosmetics are scarce with respect to those reported for other cosmetic ingredients such as preservatives or ultraviolet UV filters. In addition, most of the existing methods just consider a part of the total of dyes regulated. On the other hand, many methods have been developed for matrices different than cosmetics such as foodstuff, beverages or wastewater. The current paper reviews the recent developments in analytical methodologies for the control of synthetic dyes in cosmetics proposed in the international scientific literature in the last 10 years (2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016)(2017)(2018). A trend towards the use of miniaturized extraction techniques is evidenced. Due to the hydrophilic nature of dyes, liquid chromatography is the most usual choice in combination with absorbance detectors and, more recently, with mass spectrometry.

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Section: Analytical Methodologymentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

Section: Sample Preparationmentioning

confidence: 99%

Section: Analytical Techniquesmentioning

confidence: 99%

Section: Analytical Techniquesmentioning

confidence: 99%

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Analysis of Dyes in Cosmetics: Challenges and Recent Developments

2018

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New oil-in-salt liquid-phase microextraction on permutite for the extraction and concentration of alkaloids inCoptis chinensis

Gao

Chen

et al. 2017

J. Sep. Sci.

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A novel oil-in-salt liquid-phase microextraction was developed and introduced for the extraction and concentration of the trace levels of active alkaloids in Coptis chinensis prior to being analyzed by high-performance liquid chromatography with ultraviolet detection. Also, the oil-in-salt extraction mechanism was analyzed, the enrichment factor and extraction recovery were redefined, and the proposed method was compared with other methods. In the approach, the mixed solvent of pentanol/octanol (6:4, v/v) and NaCl (20% w/v) are immobilized on the permutite surface in turn to form oil-in-salt double membranes, through which the target analytes can be molecularized though salting-out effect and be extracted by organic solvent. The main parameters affecting the approach were investigated and optimized. Under the optimized conditions, the enrichment factors of the analytes were 30-117, the linear ranges were 0.002-2 μg/mL for jatrorrhizine, coptisine, and palmatine, and 0.001-3 μg/mL for berberine (r ≥ 0.9923). The limits of detection were less than 1 ng/mL. Satisfactory recoveries (84.3%-120.3%) and precision (0.9%-7.5%) were also obtained. These results confirm that the approach is a simple and reliable sample pretreatment procedure and allows for the quantification of active alkaloids in C. chinensis at actual concentration levels.

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High-performance liquid chromatographic determination of multi-mycotoxin in cereals and bean foodstuffs using interference-removal solid-phase extraction combined with optimized dispersive liquid-liquid microextraction

Zhou

Huang

et al. 2017

J. Sep. Sci.

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A novel pre-treatment was proposed for the simultaneous determination of aflatoxins, ochratoxin A and zearalenone in foodstuffs using high-performance liquid chromatography with fluorescence detection. The analytical procedure was based on a first step using a quick, easy, cheap, effective, rugged, and safe based extraction procedure, followed by salting out and purification with a C solid-phase extraction column as interference removal clean-up. Subsequently, collected supernatant was subjected to dispersive liquid-liquid microextraction. Response surface methodology based on central composite design was employed to optimize conditions in the microextraction procedure. Under the optimum conditions, satisfactory analytical performance with recoveries ranging from 63.22 to 107.6% were achieved in different types of cereals and beans, as well as desirable precisions (0.81-8.13%). Limits of detections and quantifications for these six mycotoxins ranging from 0.03 to 13 μg/kg and 0.22 to 44 μg/kg, respectively, were obtained. Finally, the established method was successfully validated by four certified reference materials (P = 0.897> 0.05) and applied to 79 samples from local markets.

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Optimization of magnetic stirring assisted dispersive liquid–liquid microextraction of rhodamine B and rhodamine 6G by response surface methodology: Application in water samples, soft drink, and cosmetic products

Cited by 60 publications

References 18 publications

Analysis of Dyes in Cosmetics: Challenges and Recent Developments

Analysis of Dyes in Cosmetics: Challenges and Recent Developments

New oil-in-salt liquid-phase microextraction on permutite for the extraction and concentration of alkaloids inCoptis chinensis

High-performance liquid chromatographic determination of multi-mycotoxin in cereals and bean foodstuffs using interference-removal solid-phase extraction combined with optimized dispersive liquid-liquid microextraction

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