Sample Digestion Methods for the Determination of Traces of Precious Metals by Spectrometric Techniques

Balcerzak, Maria

doi:10.2116/analsci.18.737

Cited by 168 publications

(86 citation statements)

References 123 publications

(131 reference statements)

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“…Chloride complexes are the products of the majority of procedures applied for the digestion of various noble metal samples. 28 They are widely used for the separation and the determination of the metals. 29,30 The complexes chosen for the experiments carried out in this work have the highest stability in chloride media.…”

Section: Resultsmentioning

confidence: 99%

Spectrophotometric Studies of the Interaction of Noble Metals with Quercetin and Quercetin-5′-Sulfonic Acid

et al. 2004

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Section: Resultsmentioning

confidence: 99%

Spectrophotometric Studies of the Interaction of Noble Metals with Quercetin and Quercetin-5′-Sulfonic Acid

et al. 2004

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“…Note that these groups of fingerprint properties were selected on the basis of the availability of analytical equipment used successfully in previous studies to discriminate sediment sources (Foster and Walling 1994, Collins et al 1997a, Collins and Walling 2002, Wallbrink et al 2003, Walling 2005. The concentrations of all metals were determined using Inductively Coupled Plasma Optical Emission spectrometry, VISTA-PRO model (ICP-OES), after direct and complete digestion with H 2 SO 4 , HCLO 4 , HNO 3 and HF acid (Marıń et al 2001, Balcerzak 2002, Hseu et al 2002, Matusiewicz 2003. To assess the analytical capability of the proposed methodology, the accuracy of the total available elements was checked by including with each batch of 20 digested samples, one blank and Standard Reference Materials (SRM 2709) from the National Institute of Standards and Technology (NIST).…”

Section: Laboratory Analysismentioning

confidence: 99%

Ascribing soil erosion types for sediment yield using composite fingerprinting technique

Sadeghi

Najafi

Bakhtiari

et al. 2014

Hydrological Sciences Journal

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Soil erosion and eroded sediment are serious threats to sound land management. However, less attention has been given to quantifying the importance of different soil erosion features based on appropriate control measures that could be designated. Accordingly, this research was planned to quantify the contribution of potential sediment sources, i.e. sheet, rill and gully erosion, in Idelo watershed in Zanjan Province, Iran, using composite fingerprinting. Toward this aim, 16 geochemical and organic tracers were detected in sediment sources and sediment deposited at the outlet. The results of applying the composite fingerprinting technique, with a relative error of 16%, showed that sheet, rill and gully sources contributed 56%, 44% and 0%, respectively, to sediment yield. It was also apparent from the results that the composite fingerprinting approach could be successfully utilized to assess the provenance of sediment deposited at the main outlet of the study watershed by soil erosion type.Key words composite fingerprinting; geochemical properties; sediment source discrimination; sediment yield; Idelo watershed, Iran Attribution de types d'érosion des sols pour la production de sédiments en utilisant la technique des empreintes composites Résumé L'érosion des sols et les sédiments érodés représentent de sérieuses menaces pour la bonne gestion des terres. Cependant, la quantification de l'importance des différentes caractéristiques de l'érosion des sols sur la base de mesures de contrôle appropriées qui pourraient être identifiées, a reçu une attention limitée. En conséquence, la présente recherche a eu pour objectif de quantifier la contribution des sources potentielles de sédiments, c'est-à-dire l'érosion en nappe, rigoles et ravines, dans le bassin versant de l'Idelo dans la province de Zanjan (Iran), à l'aide d'empreintes composites. A cette fin, 16 traceurs géochimiques et biologiques ont été détectés dans les sources de sédiments et les sédiments déposés à l'exutoire. Les résultats de l'application de la technique des empreintes composites, avec une erreur relative de 16%, ont montré que les sources de nappes, rigoles et ravines ont contribué respectivement à hauteur de 56%, 44% et 0%, au rendement sédimentaire. Les résultats ont également permis de comprendre que l'approche par empreintes composites pourrait être utilisée avec succès pour évaluer la provenance par type d'érosion des sols des sédiments déposés à l'exutoire principal du bassin versant d'étude.

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“…This calls for highly sensitive analytical techniques, capable of multi-element analysis. Analytical techniques for the determination of precious metals in geological samples were reviewed by Hall and Bonham-Carter (1988), Reddi and Rao (1999), Balcerzak (2002), and Zhang et al (2014). Sample decomposition and pre-concentration methods available include the lead fire assay (Pb-FA) and nickel sulfide fire assay (NiS-FA) techniques (Lenahan and Murray-Smith, 1986;Barefoot and Van Loon, 1999), chlorination and wet multi-acid digestion procedures (Reddi and Rao, 1999).…”

Section: Introductionmentioning

confidence: 99%

Application of two-level full factorial design and response surface methodology in the optimization of inductively coupled plasma-optical emission spectrometry (ICPOES) instrumental parameters for the determination of platinum

Mapfumo¹,

Zaranyika²

2017

J. Geol. Min. Res.

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Inductively coupled plasma optical emission spectrometry (ICP-OES) determination of platinum was optimized using 2-level, 4-factor full factorial design and response surface methodologies. Four factors, namely carrier gas flow rate, sample solution flow rate as represented by the pump speed, plasma observation height and RF power, were employed in the factorial design. Analysis of variance (ANOVA) at a p-value significance level of 0.05 was used to assess the significance of the factors on platinum analytical line emission intensity. The main effects of carrier gas flow rate and plasma power, and the interaction effect of carrier gas flow rate and plasma power, were found to be statistically significant and were varied during subsequent optimization procedure using contour map and response surface methodologies. Plasma observation height and pump speed were found to have an insignificant effect on the platinum intensity and were held constant at 10 mm above the load coil and 30 revolutions per minute, respectively during the optimization procedure. The optimized procedure comprised of a carrier gas flow rate of 0.70 L/min and plasma power of 1400 W, and was validated by analysis of Certified Reference Materials (CRMs) AMIS 0132 for low platinum grades and AMIS 0164 for high platinum grades. The instrumental limit of detection (LOD) and limit of quantization (LOQ) obtained were 0.035 µg/g Pt and 0.105 µg/g Pt, respectively, and highly precise determinations of Pt (0.21 to 0.24% RSD) were obtained when three batches of PMG ore floatation concentrates were analyzed using the optimized ICP-OES parameters.

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Sample Digestion Methods for the Determination of Traces of Precious Metals by Spectrometric Techniques

Cited by 168 publications

References 123 publications

Spectrophotometric Studies of the Interaction of Noble Metals with Quercetin and Quercetin-5′-Sulfonic Acid

Spectrophotometric Studies of the Interaction of Noble Metals with Quercetin and Quercetin-5′-Sulfonic Acid

Ascribing soil erosion types for sediment yield using composite fingerprinting technique

Application of two-level full factorial design and response surface methodology in the optimization of inductively coupled plasma-optical emission spectrometry (ICPOES) instrumental parameters for the determination of platinum

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