Silica Gel with Immobilized Chelating Groups as an Analytical Sampling Tool

Leyden, Donald E.; Luttrell, G. Howard.; Patterson, Thomas

doi:10.1080/00032717508060360

Cited by 41 publications

(12 citation statements)

References 3 publications

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“…11,12 N-substituate ethylenediammine was anchored on a silicagel silanized by 3-(2-amino) propyltrimetoxysilane was used to enrich some metals from sea-water. 13 1-4 diazobiscyclo(2,2,2)octane attached to silicagel was used to study chloride complexes and sorption or desorption properties of transition metals. 14…”

Section: Introductionmentioning

confidence: 99%

Preparation of a chromatographic solid support on the basis of perlite and separation of uranium on a TBP-loaded perlite column

Akçay¹,

Kılınç²,

Karakaş³

1998

J Radioanal Nucl Chem

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The possibilities of preparing a packing for reversed phase column chromatography from Menderes' perlite were studied. Its physical and chemical characteristics were compared with other solid supports prepared from rocks, such as perlite and volcanic slags. A series of chemical treatments were applied to improve the mechanical and chemical properties of perlite. The experimental work covers the strong acid treatment, the strong base treatment and the silanization with DMCS. The raw perlite containing 70-73% SiO 2 was treated with NaOH to make soluble silicates and to increase it. Thus the surface and mechanical characters of the modified perlite were determined. The mean surface OH group density and the specific surface area were 3.2 p~mol/m z and 9.2 mZ/g, respectively. The modified perlite was silanized and hydrophized to load organic complexing agents. The TBP was fixed successfully on perlite up to 20% w/w. The packing prepared was used to study the chromatographic behavior of UO22+ Fe 3+.

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Section: Introductionmentioning

confidence: 99%

Preparation of a chromatographic solid support on the basis of perlite and separation of uranium on a TBP-loaded perlite column

Akçay¹,

Kılınç²,

Karakaş³

1998

J Radioanal Nucl Chem

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“…Muzzarelli and co-workers chemically modified the natural polymer, chitosan, which contains glucosamine functional groups after deacylation (3-6). Fritz et al synthesized resins containing propylenediaminetetraacetic acid groups (7), nbutylamide groups (8), and hexylthioglycolate groups (9).Vernon and Eccles synthesized and applied N-substituted hydroxylamine (IO) and 8-hydroxyquinoline resins (11).Leyden et al immobilized alkylamines, dithiocarbamates, and xanthates onto silica gel or controlled-pore glass beads by silylation reactions (12)(13)(14)(15).T h e iminodiacetate containing resin, Chelex-100, is one of the more commonly employed metal chelating resins. Riley and others (16-19) have characterized and applied Chelex-100.…”

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confidence: 98%

“…Leyden et al immobilized alkylamines, dithiocarbamates, and xanthates onto silica gel or controlled-pore glass beads by silylation reactions (12)(13)(14)(15).…”

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Poly(acrylamidoxime) resin for the determination of trace metals in natural waters

Colella¹,

Siggia²,

Barnes³

1980

Anal. Chem.

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Fe(III), Mn( 11), Cu(II), Zn(II), Co(II), Ni(II), Hg(II), Pb(II), Cd( 11), and Ag( I ) were sequestered on a poly( acrylamidoxime) resin from laboratory prepared solutions. Recovery of the sequestered metals was achieved by equillbratlon of the resin matrix with either a 1:l HNO,/water mixture, a 1:1 HCVwater mixture, or a 1 M thiosulfate solutlon. Sequestered metals were at least 90 YO recovered with a standard devlatlon of 1 5 %. Regeneration of the resin was achieved by equllibration of the resin with a 3 M ",OH solution after the acid equilibration. The resin was applied for the separation and simultaneous concentration of Fe( HI), Cu( 11), Cd( 11), Pb( 11), and Zn(I1) from seawater and pond water. Metals were removed from the resin by equlllbratlng with a 1:l HCVwater mixture and their concentrations determined by atomic absorption spectrometry. Metal concentrations as determined by the resin method are in good agreement with the values determined directly on samples by either differential pulse polarography or dmerential pulse anodic stripping voltammetry.T h e determination of trace metals in natural waters is important from two different points of view. The first is the inorganic pollution of these waters in which metals have reached concentrations which may be deleterious t o aquatic life and ultimately man. The second consideration is that of micronutrient requirements for various life forms. As pointed out by Hume ( I ) , essential trace elements such as copper, molybdenum, iron, and manganese are present in seawater at very low levels. These are readily depleted resulting in large areas of the ocean which are aquatic equivalents of barren deserts.T h e trace metal content of natural waters must therefore be monitored to determine if the concentrations have reached toxic proportions or have been depleted below the micronutrient requirement levels. The determination of these nanogram-per-gram or sub-nonagram-per-gram levels of metals requires some method of concentration prior to their determinations by existing instrumental methods of analysis ( 2 ) .Metal chelating resins have found widespread application for the concentration of trace metals from natural waters. Muzzarelli and co-workers chemically modified the natural polymer, chitosan, which contains glucosamine functional groups after deacylation (3-6). Fritz et al. synthesized resins containing propylenediaminetetraacetic acid groups (7), nbutylamide groups (8), and hexylthioglycolate groups (9).Vernon and Eccles synthesized and applied N-substituted hydroxylamine (IO) and 8-hydroxyquinoline resins (11).Leyden et al. immobilized alkylamines, dithiocarbamates, and xanthates onto silica gel or controlled-pore glass beads by silylation reactions (12)(13)(14)(15).T h e iminodiacetate containing resin, Chelex-100, is one of the more commonly employed metal chelating resins. Riley and others (16-19) have characterized and applied Chelex-100. Concentration of copper, cadmium, lead, and zinc from sea-'Present address: General Electric Co., Lynn, MA 01910...

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“…Other resins which have been used for the concentration of trace metals contain hydroxamic acid (45), dithiocarbamate (46)(47)(48), aniline sulfur (49), poiyaniine and imine (50,51), thiol (52), and phenol (53) functional groups.…”

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confidence: 99%

“…A nmnber of other supports are available as matrices for chelating resins. The most Important of these is silica gel which has been used as the matrix for a number of resins (46)(47)(48)50,57). However, It has two disadvantages which limit its usefulness.…”

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The synthesis, characterization, and application of chelating ion-exchange resins

Moyers¹

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INFORMATION TO USERSThis material was produced from a microfilm copy of the original document. While the most advanced technological means to photograph and reproduce this document have been used, the quality is heavily dependent upon the quality of the original submitted.The following explanation of techniques is provided to help you understand markings or patterns which may appear on this reproduction.

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Silica Gel with Immobilized Chelating Groups as an Analytical Sampling Tool

Cited by 41 publications

References 3 publications

Preparation of a chromatographic solid support on the basis of perlite and separation of uranium on a TBP-loaded perlite column

Preparation of a chromatographic solid support on the basis of perlite and separation of uranium on a TBP-loaded perlite column

Poly(acrylamidoxime) resin for the determination of trace metals in natural waters

The synthesis, characterization, and application of chelating ion-exchange resins

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