Determination of the noble metals in geological materials by neutron activation analysis

Nadkarni, R.A.; Morrison, George H.

doi:10.1021/ac60338a027

Cited by 83 publications

(21 citation statements)

References 26 publications

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“…(i) 1,3,4-Thiadiazole-2-amino-5-thiol [80] (ii) Dipicolinic acid [81] (iii) Polyhydroxamic acid [79,82] (iv) 8-hydroxyquinoline [79,83] (v) Guanidine derivatives [79,84] (vi) N,N -bis(2-hydroxybenzyl)-ethylenediamine [79,85] (vii) Miscellaneous [79,86].…”

Section: N-containing Sorbents For Preconcentration Of Au Pd and Ptmentioning

confidence: 99%

Solid‐phase extraction in the determination of gold, palladium, and platinum

Mladenova

Karadjova²,

Tsalev³

2012

J of Separation Science

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A simple classification of various sorbents and solid-phase extraction procedures used for preconcentration of trace levels of Au, Pd, and Pt from different sample types is proposed in this review article. The large variety of available sorbents/procedures has been organized according to expected mechanisms of sorption process (complex formation; ion exchange; adsorption; ion-imprinted or molecularly imprinted polymers); according to the kind of monomeric units of the polymer matrix as well as on the basis of the kind of functional group responsible for main performance characteristics (selectivity, capacity) of the sorbent. Advantages of chemically modified sorbents, sulfur-containing sorbent extractants, and ion-imprinted polymers, together with rational pretreatment by means of microwave treatments, scaling down of enrichment, and quantification by means of flow and flow injection approaches are given. Preferred instrumental techniques for quantification of ppb levels of Au, Pd, and Pt in prepared concentrates/column eluates are multielement instrumental techniques: inductively coupled plasma optical emission spectrometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICPMS). Excellent limits of detection at picogram levels of these analytes are provided by electrothermal atomic absorption spectrometry (ETAAS), generally in single-element mode and the neutron activation analysis (NAA), while X-ray fluorescence spectrometry and flame AAS are rarely applied because of lack of sensitivity at sub-ppm levels of Au, Pd, and Pt. Some problems of atomic spectrometric quantification techniques and their representative limits of detection are given. Recent applications to geological, industrial, pharmaceutical, biological, and other materials are tabulated. References have been selected mostly from the period 1995 to 2010.

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Section: N-containing Sorbents For Preconcentration Of Au Pd and Ptmentioning

confidence: 99%

Solid‐phase extraction in the determination of gold, palladium, and platinum

Mladenova

Karadjova²,

Tsalev³

2012

J of Separation Science

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“…Fritz and Moyers prepared arsonic acid (44) and diaminetetraacetic acid resins (45) Nadkarni and Morrison used Srafion NMRR resin for the concentration of noble metals and silver from geological materials so that they could be determined by neutron acti vation analysis (54,55). The metals were taken up from solutions of pH 1.5-2.…”

Section: Ch- -C -Chmentioning

confidence: 99%

Analytical applications of resins containing amide and polyamine functional groups

Orf

1977

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“…Koster and Scumuckler developed a benzyl-isothlnu-ponium resin (39), commercially marketed as SRXL, which has received the most attention for its recovery of gold (32,40,41). It has also been used for studies of mercury (98) …”

Section: )mentioning

confidence: 99%

“…Koster and Schmuckler (39) developed an isothiouronium resin, SRXL, that has been used for recovery of gold and platinum metals (32,40,41). Myasoedova, Savvin, and co workers (42)(43)(44)) studied a number of resins for the concen tration of gold and platinum metals and their separation from other transition metals.…”

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confidence: 99%

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

Moyers¹

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Determination of the noble metals in geological materials by neutron activation analysis

Cited by 83 publications

References 26 publications

Solid‐phase extraction in the determination of gold, palladium, and platinum

Solid‐phase extraction in the determination of gold, palladium, and platinum

Analytical applications of resins containing amide and polyamine functional groups

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

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