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Inductively coupled plasma atomic emission spectrometry (ICP-AES) implemented on a simultaneous spectrometer was used for the determination of trace amounts of phosphorus in rocks, soils and sediments. Samples were decomposed by using a mixture of concentrated hydrofluoric, perchloric and nitric acid in Teflon beakers. Overlap of emissions from other elements present in the samples with the polychromator spectral line at 214.914 nm for phosphorus was studied. The corresponding inter-element coefficients for overlap correction were determined and the optimum position for background readings was established. The limit of determination achieved was 24 ppm referred to the solid sample. The proposed method was tested by applying it to the analysis of rock, soil and sediment certified reference materials, and determining its short-time precision and method precision, which turned out to be O.24-O.68YO and 1.70-4.16% (relative standard deviation), respectively.

Olivola (2018) postulated that the sunk cost fallacy, choosing a less preferred option simply because an original investment was already committed, would be facilitated by interpersonal factors. The prior work had compared sunk cost decisions made individually (intrapersonally) and those made on behalf of someone else (interpersonally) and found the relationship between type of investment and commitment of the sunk cost fallacy to be impacted by both intrapersonal and interpersonal influences. Our study sought to replicate Olivola’s original experimental methods and analyses but advanced his original research question with additional analytic investigation using factorial logistic regression. We found similar results to Olivola, however, we also discovered that committing the sunk cost fallacy was significantly more impacted by the price of the sunk cost rather than the person investing, χ2 (420, N = 423) = 209.41, p < .001, R 2 = .53, OR = 33.11, p < .001. This study expanded prior research findings on how individual investment decisions are influenced by others’ investments by contrasting this outcome with how the amount that is invested or given might be more important than the giver or the situation. This is an important distinction as future research seeks to find what influences people’s decisions for personal investments of money, time, etc.

(2) Equipo de investigadores del Proyecto de Investigación: Historia empresarial, mercados y desarrollo productivo en la minería española contemporánea. http://www.um.es/hisminas RESUMEN La Faja Pirítica Ibérica, en la que se ubican más de 70 yacimientos de sulfuros masivos volcanogénicos, constituye una provincia metalogenética a escala mundial, con unos recursos considerables en azufre, hierro y metales básicos y en menor medida oro y plata. El Instituto Geológico y Minero de España (IGME), en el sector de las investigaciones minero-metalúrgicas, ha participado en diversos proyectos encaminados a la recuperación del oro de este tipo de mineralizaciones. Una buena parte de su labor investigadora, en el ámbito de la hidrometalurgia, se ha centrado en la búsqueda de tratamientos alternativos de las menas auríferas refractarias, tan características de la Faja Pirítica, contemplando simultáneamente la recuperación de los metales básicos y del oro contenido en dichas menas, así como la extracción de cualquier otro metal minoritario, susceptible de beneficio económico, que pudiera contribuir a la reducción de los costes de explotación. A tal fin, se han combinado métodos de tratamiento tradicionales, como la cianuración, con otros de carácter innovador, tales como la lixiviación ácida a presión, la tostación oxidante, la lixiviación férrica a presión atmosférica y la biolixiviación.

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