Determination of the precious metals in geological materials by inductively coupled plasma mass spectrometry

Barefoot, R.R.

doi:10.1039/a803216e

Cited by 53 publications

(43 citation statements)

References 38 publications

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“…1 приведены использованные для определения концентраций изотопы платиновых металлов и рения; возможные спектральные изобарные и полиатомные наложения (аргидные, оксидные и хло-ридные ионы элементов, составляющих матрицу пробы). Полиатомные наложения с несколько отличающимся набором представлены в работах [2,7,8,10,24,25]. В программном приложении E2 к масс-спектрометру Element 2 приведены все теоретически возможные полиатомные наложения с графическим моделированием величин сигналов аналита и интерферентов для разных разрешений прибора.…”

Section: результаты и их обсуждениеunclassified

Determination of platinum-group elements in rocks by ICP-MS with external calibration after cation exchange separation of matrix elements by KU-2-8 resin

Men’shikov¹,

Lozhkin²,

Iu.³

2016

АиК

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Поступила в редакцию 3 июня 2016 г., после исправления -7 июля 2016 г.Предложена методика определения элементов платиновой группы (ЭПГ) Ru, Rh, Pd, Ir, Pt и Re в геологических образцах в диапазоне концентраций от 0.1 нг/г до 10 мкг/г, а также Os в перидотитах на уровне нг/г методом масс-спектрометрии с индуктивно связанной плазмой с внешней градуировкой и без химического удаления Zr и Hf. Подготовка проб основана на их кислотной деструкции в открытых системах после обжига с последующим доплавлением нерастворимого остатка с NH 4 F и отделением матричных элементов на катионите КУ-2-8 (фирма Токем, Россия). Измерения выполнены на масс-спектрометре высокого разрешения Element 2 (Finnigan MAT, Германия). Правильность определения содержания ЭПГ на уровне мкг/г подтверждена сравнением полученных результатов с аттестованными значениями для двух государственных стандартных образцов (ГСО) руды пирротиновой сплошной РП-1 и руды сульфидной медно-никелевой Ж-3, а для содержания аналитов на уровне нг/г -ана-лизом международного образца сравнения перидотита OPY-1 (GeoPT-20), разрабатываемого Меж-дународной Ассоциацией Геоаналитиков (IAG). Значения пределов обнаружения, рассчитанные c учетом величины контрольного опыта и его стандартного отклонения (при переведении навески 1 г в 50 мл) составили: для Ru -0.13 нг/г, Rh -0.09 нг/г, Pd -1.4 нг/г, Re -0.07 нг/г, Os -0.02 нг/г, Ir -0.09 нг/г, Pt -1.0 нг/г. Определены концентрации Re в ГСО РП-1, Ж-3 и OPY-1.Ключевые слова: элементы платиновой группы, рений, масс-спектрометрия с индуктив-но связанной плазмой, хроматографическое разделение на катионите, ГСО РП-1, ГСО Ж-3, OPY-1. The analytical technique to determine platinum-group elements (PGEs) Ru, Rh, Pd, Ir, Pt and Re in the geological samples within 0.1 ng/g -10 μg/g range and Os on ng/g level in the ultramafic rocks by inductively coupled plasma mass-spectrometry with external calibration and without chemical removal of main interferences of Zr and Hf was proposed. The samples were prepared after their burning by acid decomposition in the open vessels, melting the insoluble residue with NH 4 F and with a subsequent cation exchange separation of PGEs from matrix elements by KU-2-8 resin (Russia). The measurements have been carried out using the high resolution mass-spectrometer Element 2 (Germany). The accuracy of the technique on μg/g level has been verified with reference materials: pyrrhotite ore RP-1 (Russia) and sulfide copper-nickel ore Zh-3 (Russia). In addition, the accuracy of the trace level (ng/g) has been verified by comparison of the results obtained in this study with those reported in the literature for international sample of comparison

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Section: результаты и их обсуждениеunclassified

Determination of platinum-group elements in rocks by ICP-MS with external calibration after cation exchange separation of matrix elements by KU-2-8 resin

Men’shikov¹,

Lozhkin²,

Iu.³

2016

АиК

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“…Then 2 mL 4:4:1 HNO 3 :Hf: HClO 4 mixed acid was added and heated at 150°C overnight. After this solution was evaporated, residues were dissolved in 5% HNO 3 and diluted to 200 g using 5% HNO 3 . This solution was filtered and introduced to the ICP-MS.…”

Section: Reference Materialsmentioning

confidence: 99%

“…Estimates of crustal abundance are on the order of 0.003-0.004 parts per million [1], and it is very difficult to quantify Au accurately at such low levels. Analytical methods for Au detection include a fire assay [2][3][4][5] with instrumental neutron activation (INAA) [2][3][4][5][6], aqua regia dissolution [2,5,6] with atomic absorption (AA) such as graphite furnace atomic absorption (GFAA), aqua regia dissolution with inductively coupled plasma mass spectrometry (ICP-MS), and a combination of cyanidation [2] and AA, GFAA, or ICP-MS. Additional methods include ion exchange [7,8], preconcentration, and vapor generation with inductively coupled plasma atomic emission spectrometry (ICP-AES) [9].…”

Section: Introductionmentioning

confidence: 99%

Direct Determination of Gold in Rock Samples Using Collision Cell Quadrupole ICP-MS

Yim

Choi

Chae

2011

J. Am. Soc. Mass Spectrom.

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This study investigated the determination of Au in rock samples using collision cell quadrupole inductively coupled plasma mass spectrometry (ICP-MS). It is essential to remove various interferents using a collision cell because polyatomic ions such as energy effect (IKEE) due to the potential difference between the plasma and the hexapole affected the reactions in the cell. Au and interfering ions were very sensitive to cell bias voltage (Vc) at constant plasma potential (Vp) and quadrupole bias voltage (Vq). Under the condition of hot plasma, the transmission of ions was promoted, and the maximum Au signal intensity was 50% greater than under normal conditions. At Vc 9 7 V, TaO + ions were removed to background level. Optimized conditions for real sample analysis were obtained by introducing He as an additional collision gas in hot plasma. TaO + ions were removed to background level at He flow rates above 0.6 mL min, and the Au signal remained high. The detection limit (three times the standard deviation of the blank) of this method was 3.06 pg g −1. The results for reference materials (STM-1 and DGPM-1) and spiked samples showed good agreement between specified and measured concentrations.

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“…Although they are one of the most difficult groups of elements to determine accurately at low concentration levels, the analysis of PGEs in geological materials, including sulfide ores, has been the basis of many studies (see extensive reviews in Barefoot, 1998;Reddi and Rao, 1999). Inductively coupled plasma mass spectrometry (ICP-MS) combined with a variety of preconcentration methods has proven a powerful tool to measure these metals in a variety of geological and other material (Date et al, 1987;Jackson et al, 1990;Sun et al, 1993;Tatsumi et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

A new method to correct Ni- and Cu-argide interference in the determination of the platinum-group elements, Ru, Rh, and Pd, by ICP-MS.

et al. 2001

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The determination of low concentrations of the platinum-group elements (PGEs) in geological materials is of considerable importance and has attracted numerous studies using inductively coupled plasma mass spectrometry (ICP-MS) combined with a variety of preconcentration techniques. Among these techniques, the Ni-sulfide fire assay has proven the most convenient and efficient. However, Cu and Ni are also collected during the fire assay and cause serious isobaric interference by Cu-and Ni-argides with the light PGEs (Ru, Rh, and Pd). This problem is most pronounced in the analyses of sulfide-rich materials. Here, we report a new technique that involves a combination of standard addition with external and internal calibrations to make corrections for Cu-and Ni-argide interference. This study demonstrates that ICP-MS is suitable for the determination of the PGEs in sulfide-rich geological materials.

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Determination of the precious metals in geological materials by inductively coupled plasma mass spectrometry

Cited by 53 publications

References 38 publications

Determination of platinum-group elements in rocks by ICP-MS with external calibration after cation exchange separation of matrix elements by KU-2-8 resin

Determination of platinum-group elements in rocks by ICP-MS with external calibration after cation exchange separation of matrix elements by KU-2-8 resin

Direct Determination of Gold in Rock Samples Using Collision Cell Quadrupole ICP-MS

A new method to correct Ni- and Cu-argide interference in the determination of the platinum-group elements, Ru, Rh, and Pd, by ICP-MS.

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