Large sample neutron activation analysis of dross for gold and silver

Swain, K. K.; Ajith, Nicy; Acharya, R.; Verma, Rakesh Kumar; Reddy, Α. V. R.

doi:10.1007/s10967-011-1519-7

Cited by 10 publications

(8 citation statements)

References 10 publications

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“…In the framework of metallic mineral survey projects, 10-15 g samples had to be analyzed to circumvent tedious homogenization procedures [52]. In view of a study on metal recovery and accounting, large-sample NAA was used for the quantification of Au and Ag in 50-100 g dross samples refined at the India Government Mint [53]. As such, the difficulties in the dissolution of the refractory material were circumvented.…”

Section: Direct Analysis Of Materials For Which Homogenization Is Inconvenient Difficult or Close To Impossible And/or Too Expensive Due mentioning

confidence: 99%

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Bode¹

2021

Minerals

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Sample-size reduction including homogenization is often required to obtain a test portion for element compositional analysis. Analyses of replicate test portions may provide insight into the sampling constant, and often much larger quantities are needed to limit the contribution of sampling error. In addition, it cannot be demonstrated that the finally obtained test portion is truly representative of the originally collected material. Nuclear analytical techniques such as neutron and photon activation analysis and (neutron-induced) prompt gamma activation analyses can now be used to study and overcome these analytical problems. These techniques are capable of obtaining multi-element measurements from irregularly shaped objects with masses ranging from multiple grams to multiple kilograms. Prompt gamma analysis can be combined with neutron tomography, resulting in position-sensitive information. The analysis of large samples provides unprecedented complementary opportunities for the mineral and geosciences. It enables the experimental assessment of the representativeness of test portions of the originally collected material, as well as the analysis of samples that are not allowed to be sub-sampled or dissolved, the analysis of materials that are difficult to be homogenized at large, and studies on the location of inhomogeneities. Examples of such applications of large-sample analyses are described herein.

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Section: Direct Analysis Of Materials For Which Homogenization Is Inconvenient Difficult or Close To Impossible And/or Too Expensive Due mentioning

confidence: 99%

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Bode¹

2021

Minerals

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“…X‐ray fluorescence (XRF) and neutron activation analysis (NAA) have been established as very efficient and versatile analytical techniques for the direct analysis of solids. Determination of gold and silver in dross by large‐sample NAA technique has been reported from our laboratory . However, the NAA technique requires a nuclear reactor.…”

Section: Introductionmentioning

confidence: 97%

Determination of gold and silver in dross using EDXRF technique

et al. 2014

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Gold and silver in dross were determined by energy-dispersive X-ray fluorescence technique. Sample was prepared by pressed pellet method using microcrystalline cellulose powder as binder, and a method of standard additions was used for quantification. L β X-ray of gold (11.4 keV) and K β X-ray of silver (24.9 keV) were used for analysis. The measured concentrations of gold and silver were 132 ± 8 and 1181 ± 84 mg kg À1, respectively. The results were validated by instrumental neutron activation analysis technique. The t-test indicated that there was no significant difference between results obtained by the two techniques. Energy-dispersive X-ray fluorescence is a simple, precise and accurate technique for the determination of gold and silver in dross.

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“…The internal comparator content can be also found by an independent method. Matrix or major elements are usually selected to implement internal standardization: Ca for compositional characterization of cement samples [31], Fe to measure element contents of meteorites [29], uranium ore [30] and high-purity aluminum-clad samples [32], and Na for large dross sample analysis for Au and Ag content [33]. Sometimes other elements can be used, such as Sc for the elemental analysis of ancient pottery samples [34], Rb to analyze plant leave samples [27], and La for INAA ISM verification by means of Soil-7 CRM [28].…”

Section: Introductionmentioning

confidence: 99%

Rare earths analysis of rock samples by instrumental neutron activation analysis, internal standard method

Silachyov

2016

J Radioanal Nucl Chem

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The application of instrumental neutron activation analysis for the determination of long-lived rare earth elements (REE) in rock samples is considered in this work. Two different methods are statistically compared: the well established external standard method carried out using standard reference materials, and the internal standard method (ISM), using Fe, determined through X-ray fluorescence analysis, as an element-comparator. The ISM proved to be the more precise method for a wide range of REE contents and can be recommended for routine practice.

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Large sample neutron activation analysis of dross for gold and silver

Cited by 10 publications

References 10 publications

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Kilogram Sample Analysis by Nuclear Analytical Techniques: Complementary Opportunities for the Mineral and Geosciences

Determination of gold and silver in dross using EDXRF technique

Rare earths analysis of rock samples by instrumental neutron activation analysis, internal standard method

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