Chelating Sorbents in Analytical Chemistry

Myasoedova, G. V.; Саввин, С. Б.; Biasius, E.

doi:10.1080/10408348608085549

Cited by 62 publications

(21 citation statements)

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“…Dentre as principais aplicações, destaca-se seu uso como fase estacionária em cromatografia [1][2][3][4][5] , como catalisadores suportados 6 , em pré-concentração de íons metálicos 7-10 , imobilização de enzimas 11 , nas modificações de superfícies de eletrodos [12][13] e em outras aplicações. Agentes quelantes tais como ferroína 14 , ditizona [15][16] , 8-hidroxiquinoleína [17][18][19][20][21][22][23][24][25][26][27][28][29] , dimetilglioxima 30 , alquilaminas, diaminas, xantatos, ditiocarbamatos [31][32][33][34] e ácido propilenodiaminotetracético 35 , têm sido imobilizados em vários substratos com subseqüente utilização na pré-concentração de traços de metais de soluções aquosas.…”

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Análise das isotermas de adsorção de Cu(II), Cd(II), Ni(II) e Zn(II) pela N-(3,4-dihidroxibenzil) quitosana empregando o método da regressão não linear

Klug¹,

Sanches²,

Laranjeira³

et al. 1998

Quím. Nova

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Análise das isotermas de adsorção de Cu(II), Cd(II), Ni(II) e Zn(II) pela N-(3,4-dihidroxibenzil) quitosana empregando o método da regressão não linear

Klug¹,

Sanches²,

Laranjeira³

et al. 1998

Quím. Nova

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“…5 A number of solid-phase extraction (SPE) methods have been reported in the literature which utilizes various materials, such as ion-exchange resin, functionally modified polymers and C18-glass beads as adsorbents. [6][7][8][9] Although, these methods result in better recovery and an excellent preconcentration factor, the slow sorption and desorption process, and a tedious procedure for preparing the adsorbents make these methods troublesome and time-consuming. Therefore, from economy and simplicity point of view, a conventional determination method with an improved analytical procedure, which can match the modern analytical instruments in terms of its specificity and sensitivity, would find many applications in common laboratories.…”

Section: Introductionmentioning

confidence: 99%

Differential Pulse Polarographic Determination of Zinc and Manganese in Commercial Sodium Salts and Water Samples after Preconcentration of Their 2-(2-Pyridylazo)-5-diethylaminophenol Chelates Using Ammonium Tetraphenylborate-Naphthalene Adsorbent

Pancras

Puri

2000

ANAL. SCI.

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A highly sensitive, rapid and economical differential pulse polarographic method was developed for the simultaneous determination of trace amounts of zinc and manganese in commercial sodium salts, mineral water, human hair and environmental waste liquid and solid samples. Ammonium tetraphenylborate-microcrystalline naphthalene coprecipitate, loaded in a plastic syringe-type cartridge (i.d. 10 mm, length 100 mm), was used as a column for the preconcentration of zinc and manganese as their 2-(2-pyridylazo)-5-diethylaminophenolates. The retention was quantitative in the pH range 7.5 -11.0 and 9.0 -11.5 for Zn and Mn, respectively. Preconcentration factors of 50 and 75 were obtained at a flow rate of 10 ml/min for zinc and manganese, respectively. The detection limits were 300 ng for Zn and 500 ng for Mn in 10 ml of the final solution at signal-to-noise ratio of 3. Various parameters were studied and the developed analytical methodology was validated by analyzing NIES certified reference materials such as human hair, chlorella and tea leaves.

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“…1,3 Sorption preconcentration is one of the most effective methods for these metals. 17,18 In recent years, complexing (chelating) sorbents and ion exchangers are widely used for noble metal preconcetration. 19,20 In cases where extremely low noble metal contents and their heterogeneous distribution exist, samples of large mass are required.…”

Section: Introductionmentioning

confidence: 99%

Trends in Sorption Preconcentration Combined with Noble Metal Determination

2007

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Nowadays much attention is being paid to the determination of trace amounts of noble metals in geological, industrial, biological and environmental samples. The most promising techniques, such as inductively coupled plasma atomic emission spectrometry (ICP-AES), inductively coupled plasma mass spectrometry (ICP-MS) and electrothermal atomic absorption spectrometry (ETAAS) are characterized by high sensitivity. However, the accurate determination of trace noble metals has been limited by numerous interferences generated from the presence of matrix elements. To decrease, or eliminate, these interferences, the sorption preconcentration of noble metals is often used prior to their instrumental detection. A great number of hyphenated methods of noble metal determination using sorption preconcentration have been developed. This review describes the basic types of available sorbents, preconcentration procedures and preparations of the sorbent to the subsequent determination of noble metals. The specific features of instrumental techniques and examples of ETAAS, FAAS, ICP-AES, ICP-MS determinations after the sorption preconcentration of noble metals are considered. The references cited here were selected mostly from the period 1996 -2006.

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Chelating Sorbents in Analytical Chemistry

Cited by 62 publications

References 0 publications

Análise das isotermas de adsorção de Cu(II), Cd(II), Ni(II) e Zn(II) pela N-(3,4-dihidroxibenzil) quitosana empregando o método da regressão não linear

Análise das isotermas de adsorção de Cu(II), Cd(II), Ni(II) e Zn(II) pela N-(3,4-dihidroxibenzil) quitosana empregando o método da regressão não linear

Differential Pulse Polarographic Determination of Zinc and Manganese in Commercial Sodium Salts and Water Samples after Preconcentration of Their 2-(2-Pyridylazo)-5-diethylaminophenol Chelates Using Ammonium Tetraphenylborate-Naphthalene Adsorbent

Trends in Sorption Preconcentration Combined with Noble Metal Determination

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