Cytosine-functionalized polyurethane foam and its use as a sorbent for the determination of gold in geological samples

Xue, Dingshuai; Wang, Hongyue; Liu, Yanhong; Shen, Ping; Sun, Jingbo

doi:10.1039/c5ay01737h

Cited by 18 publications

(13 citation statements)

References 40 publications

(39 reference statements)

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“…After a marked decline in the number of publications with the use of sponge and sponge-like materials in sample preparation, after 2010, this trend was revived, and more and more studies were published. As with the reports of the previous years, some PUF-based sorbents were developed for metal species, albeit to a lower extent [ 9 , 32 , 57 , 58 ]. For instance, the use of Eriochrome Black T as a complexing agent for Cu 2+ was recently proposed [ 9 ].…”

Section: The Revival Of the Trendmentioning

confidence: 91%

“…However, there were certain cases where PUFs were loaded with selective reagents for the determination of various ions. This was done to counterbalance two main disadvantages of PUFs: lack of selectivity and low sorption capacity [32]. To make feasible the solid-phase extraction and determination of Ru 3+ , the use of PUFs functionalized with 3-hydroxy-2-methyl-1,4-naphthoquinone-4-oxime was proposed [33].…”

Section: The Beginning Of the Trendmentioning

confidence: 99%

“…Iodide ions were added to the sample solution so that the anionic complex [CdI 4 ] 2− could be formed, which formed a ternary ion that could be sorbed onto PUFs. In another study, an SPE procedure for the separation of Au 2+ traces from geological samples was developed [32]. To make this feasible, acid hydrolysis of the PUFs was carried out, and then, using glutaraldehyde as a linking arm, cytosine was added onto the PUFs.…”

Section: Recent Uses Of Polyurethane Foamsmentioning

confidence: 99%

“…The recoveries were found to be above 90% for experiments conducted using well water, leachates, and wastewater. The use of the synthesized carbon foams resulted in enhanced preconcentration factors (i.e., [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38], compared to PUFs (preconcentration factors: [11][12][13][14][15] and MeS (preconcentration factors: 7-12). In two other studies, GO/polypyrrole foams were developed and used in pipette-tip SPE procedures [62,63].…”

Section: Development Of Carbon-based Foamsmentioning

confidence: 99%

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Sponges and Sponge-Like Materials in Sample Preparation: A Journey from Past to Present and into the Future

Chatzimitakos

Stalikas

2020

Molecules

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Even though instrumental advancements are constantly being made in analytical chemistry, sample preparation is still considered the bottleneck of analytical methods. To this end, researchers are developing new sorbent materials to improve and replace existing ones, with the ultimate goal to improve current methods and make them more efficient and effective. A few years ago, an alternative trend was started toward sample preparation: the use of sponge or sponge-like materials. These materials possess favorable characteristics, such as negligible weight, open-hole structure, high surface area, and variable surface chemistry. Although their use seemed promising, this trend soon reversed, due to either the increasing use of nanomaterials in sample preparation or the limited scope of the first materials. Currently, with the development of new materials, such as melamine sponges, along with the advancement in nanotechnology, this topic was revived, and various functionalizations were carried out on such materials. The new materials are used as sorbents in sample preparation in analytical chemistry. This review explores the development of such materials, from the past to the present and into the future, as well as their use in analytical chemistry.

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Section: The Revival Of the Trendmentioning

confidence: 91%

Section: The Beginning Of the Trendmentioning

confidence: 99%

Section: Recent Uses Of Polyurethane Foamsmentioning

confidence: 99%

Section: Development Of Carbon-based Foamsmentioning

confidence: 99%

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Sponges and Sponge-Like Materials in Sample Preparation: A Journey from Past to Present and into the Future

Chatzimitakos

Stalikas

2020

Molecules

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“…Until now, the widely used Au test methods include titration (Stefano et al 2015), atomic absorption spectrometry (Yilmaz and Soylak 2014;Choi et al 2017;Zhou et al 2017;Tang et al 2019), inductively coupled plasma optical emission spectroscopy (George and Konstantinos 2016;Hassan et al 2016;Xue et al 2016), microwave plasma atomic emission spectrometry (Balaram et al 2013), and inductively coupled plasma mass spectrometry (ICP-MS) (Liu et al 2013;Tao et al 2017;Satyanarayanan et al 2018;Chen et al 2019). Among them, ICP-MS meets the test conditions of most geological samples and has the advantages of low detection limit, high sensitivity, and wide linear range (Qi et al 2011;Resano et al 2012;Yim et al 2012;Strnad et al 2016;Berezhnaya and Dubinin 2017).…”

Section: Introductionmentioning

confidence: 99%

Gold determination in soil by ICP-MS: comparison of sample pretreatment methods

Tang

et al. 2020

J Anal Sci Technol

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At present, the direct gold determination in geological samples by inductively coupled plasma mass spectrometry (ICP-MS) is still an arduous challenge due to both spectral and background interferences. It is very important and necessary to study the pretreatment processes; therefore, the polyurethane foam treatment and sample digestion methods are explored and compared here. The experimental results showed that the gold adsorption rate of treated foam was significantly improved as the impurities in the foam were cleaned up, and the potential difference of the liquid membrane was increased. Meanwhile, the combination of the foam enrichment and thiourea desorption achieved the selective adsorption and desorption of gold ions, eliminated the interference of coexisting ions, and perfected the detection limits. Compared with the traditional electric heating plate digestion method, microwave digestion, a closed digestion method, had the advantages of less sample and reagent dosage, short time consumption, high degree of automation, thorough digestion, good security, and environmental friendliness and met the requirements of green chemistry development. The proposed microwave digestion-foam enrichment-thiourea desorption-ICP-MS determination method was applied to the gold test in soil samples of the actual gold mining area. It has the great potential as a routine laboratory procedure.

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An ion-imprinted thiocyanato-functionalized mesoporous silica for preconcentration of gold(III) prior to its quantitation by slurry sampling graphite furnace AAS

et al. 2018

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A gold(III)-imprinted thiocyanato-functionalized silica network of type SBA-15 was prepared by co-condensation of tetraethoxysilane (TEOS) with thiocyanatopropyltriethoxysilane (TCTES) in the presence of Pluronic123 and Au(III) ions. Compared to the non-imprinted material, the imprint has a higher selectivity and adsorption capacity for Au(III). The maximum static adsorption capacity for Au(III) is 475 mg·g−1 for the ion-imprinted, and 62 mg·g−1 for the non-imprinted sorbent. The imprint was applied to the sorption of Au(III) from digested geological samples prior to its determination by graphite furnace atomic absorption spectrometry. Adsorption is fast and does not substantially prolong the analytical procedure. Under optimum conditions, the detection limit for Au(III) is 2 ng·g−1. The method was validated by analyzing certified reference materials, and results were in good agreement with certified values. The procedure was successfully applied to the separation and determination of gold in complex geological samples. Graphical abstractSchematic presentation of the preparation of ion-imprinted thiocyanato-functionalized mesoporous silica and its application for the preconcentration of gold from digested soils before its determination by slurry sampling graphite furnace atomic absorption spectrometry (GF AAS). Electronic supplementary materialThe online version of this article (10.1007/s00604-018-3106-x) contains supplementary material, which is available to authorized users.

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Cytosine-functionalized polyurethane foam and its use as a sorbent for the determination of gold in geological samples

Cited by 18 publications

References 40 publications

Sponges and Sponge-Like Materials in Sample Preparation: A Journey from Past to Present and into the Future

Sponges and Sponge-Like Materials in Sample Preparation: A Journey from Past to Present and into the Future

Gold determination in soil by ICP-MS: comparison of sample pretreatment methods

An ion-imprinted thiocyanato-functionalized mesoporous silica for preconcentration of gold(III) prior to its quantitation by slurry sampling graphite furnace AAS

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