An effervescence tablet-assisted switchable solvent-based microextraction: On-site preconcentration of steroid hormones in water samples followed by HPLC-UV determination

Shishov, Andrey; Sviridov, I. A.; Timofeeva, Irina; Chibisova, Natalia; Москвин, Л. Н.; Bulatov, Andrey

doi:10.1016/j.molliq.2017.09.120

Cited by 57 publications

(21 citation statements)

References 29 publications

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“…Fatty acids switch from the hydrophilic to the hydrophobic states by a simple pH change. In 2017, Shishov et al proposed the use of SS in EA-DLLME for the extraction of steroid hormones in water samples [ 72 ]. In this case, a tablet containing the effervescent precursors (sodium bicarbonate and oxalic acid) and the solvent (sodium nonate) is prepared.…”

Section: Effervescence-assisted Dispersive Liquid-phase Microextramentioning

confidence: 99%

Effervescence-Assisted Microextraction—One Decade of Developments

2020

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Dispersive microextraction techniques are key in the analytical sample treatment context as they combine a favored thermodynamics and kinetics isolation of the target analytes from the sample matrix. The dispersion of the extractant in the form of tiny particles or drops, depending on the technique, into the sample enlarges the contact surface area between phases, thus enhancing the mass transference. This dispersion can be achieved by applying external energy sources, the use of chemicals, or the combination of both strategies. Effervescence-assisted microextraction emerged in 2011 as a new alternative in this context. The technique uses in situ-generated carbon dioxide as the disperser, and it has been successfully applied in the solid-phase and liquid-phase microextraction fields. This minireview explains the main fundamentals of the technique, its potential and the main developments reported.

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Section: Effervescence-assisted Dispersive Liquid-phase Microextramentioning

confidence: 99%

Effervescence-Assisted Microextraction—One Decade of Developments

2020

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“…In 2014, Lasade-Aragones et al first introduced effervescence-assisted DLLME which the extraction solvent was dispersed by an effervescence reaction between an acid and a carbonate or bicarbonate [16]. Because it is not limited by instruments such as ultrasound and vortex, it has the possibility of on-site processing and are increasingly popular for the advantages of small side effects [17].…”

Section: Introductionmentioning

confidence: 99%

“…The mechanism is that the conversion between soluble and insoluble can be achieved by adjusting the pH [20]. Moreover, the medium-chain fatty acid salt is a soluble solid, which is convenient to be combined with effervescent tablets [17]. The effervescence reaction promotes the dispersion and dissolution of SHS, while the excess acid makes the extractant convert from soluble to insoluble to complete the extraction.…”

Section: Introductionmentioning

confidence: 99%

Effervescent tablet-assisted switchable hydrophilicity solvent-based on-site dispersive liquid-liquid microextraction coupled with gas chromatography for the determination of pyrethroid pesticides in environmental waters

Han

Zhao

et al. 2021

E3S Web Conf.

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A novel effervescent tablet-assisted switchable hydrophilicity solvent-based on-site dispersive liquid-liquid microextraction coupled with gas chromatography detection has been developed to determine five pyrethroid insecticides in environmental water samples. In this method, effervescent tablets contain effervescent precursors and extractants, which play a dual role of dispersion and extraction. After effervescence reaction, the formation of extractant and the extraction of analytes were accomplished simultaneously. Phase separation were carried by filtration using homemade filter column, which of filter is oil-absorbing cotton polypropylene. After phase separation, the extractant phase were obtained by elution. No electric instrument was required in sample pre-treatment step in the developed method. Experimental conditions affecting the extraction efficiencies have been optimized, such as type and amount of extractant, type of effervescent tablets, etc. Under the optimized conditions, the linearity was 5-500μg L-1, with coefficients greater than 0.9990. The limit of detection and the limit of quantitation were in the range of 0.22-1.88μg L-1 and 0.75-6.25μg L-1. The relative standard deviations ranged from 0.8% to 6.1%. The enrichment factors were in the range of 65-108. This method was successfully applied to the on-site processing of tap, reservoir and river water.

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“…In 2005, a new generation of solvents, known as “switchable solvents” and introduced by Jessop and co‐workers , has received attention in both academia and industrial applications . The solvent is generally composed of secondary/tertiary amines and medium‐chain fatty acids . In normal condition, the solvent is nonionic form and hardly soluble in water.…”

Section: Introductionmentioning

confidence: 99%

“…as well as the separation difficulty between sample solution and extractant. The new microextraction procedure coupled with analytical techniques has been used to determine polycyclic aromatic hydrocarbon, metal ion, herbicide, and steroid hormones in environmental or biological samples . However, there was little report on the enrichment, concentration and quantification of active constituents in complex TCM sample.…”

Section: Introductionmentioning

confidence: 99%

Sodium dodecyl sulfate sensitized switchable solvent liquid‐phase microextraction for the preconcentration of protoberberine alkaloids in Rhizoma coptidis

Xue

Chen

et al. 2018

J of Separation Science

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A sodium dodecyl sulfate sensitized switchable solvent liquid-phase microextraction method was developed and applied to the preconcentration of active alkaloids in Rhizoma coptidis followed by high performance liquid chromatography determination. Before extraction, nonionic triethylamine was converted to its cationic form in the presence of carbon dioxide. Then, the ionic solvent carrying target analytes was once more reverted to its nonionic form by adding sodium hydroxide, as well as phase separation and analytes enrichment were realized simultaneously. Several parameters affecting the approach, such as concentration of sodium dodecyl sulfate, extraction solvent volume, sodium hydroxide concentration, sample phase pH, injection solvent type, and extraction time, were investigated and optimized. The possible microextraction mechanism of double micelle supramolecular inclusion was explored. Under the optimum conditions, the enrichment factors of four protoberberine alkaloids were from 101.8 to 152.0. The linear ranges (with r ≥ 0.990) were 0.032-4.23, 0.031-4.33, 0.0026-10.04, and 0.0013-4.13 μg/mL for epiberberine, coptisine, palmatine, and berberine, respectively. The detection limits were in the range of 0.16-0.32 ng/mL. Satisfactory accuracies (recoveries 98.8-104.6%) and precisions (RSDs 1.9-10.9%) were also obtained. The results showed that the approach is rapid, effective, eco-friendly, and easy-to-handle for the enrichment and detection of active alkaloids in Rhizoma coptidis.

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An effervescence tablet-assisted switchable solvent-based microextraction: On-site preconcentration of steroid hormones in water samples followed by HPLC-UV determination

Cited by 57 publications

References 29 publications

Effervescence-Assisted Microextraction—One Decade of Developments

Effervescence-Assisted Microextraction—One Decade of Developments

Effervescent tablet-assisted switchable hydrophilicity solvent-based on-site dispersive liquid-liquid microextraction coupled with gas chromatography for the determination of pyrethroid pesticides in environmental waters

Sodium dodecyl sulfate sensitized switchable solvent liquid‐phase microextraction for the preconcentration of protoberberine alkaloids in Rhizoma coptidis

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