2013
DOI: 10.1039/c3ja50040c
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Pharmacopeial requirements for elemental impurities: a novel approach to the trace determination of osmium by oxidative pressure vessel sample digestion and measurement using inductively coupled plasma mass spectrometry (ICP-MS) after complexation and stabilisation

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Cited by 29 publications
(18 citation statements)
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“…An aliquot was taken and diluted using 3.6% nitric acid (containing thiourea (10 mM) and ascorbic acid (100 mg L À1 ) to stabilize Os in nitric acid solution). 17 The resulting solution was analysed using a PerkinElmer Optima 5300DV ICP-OES. Calibration standards for Os (50-700 ppb) were freshly prepared in 3.6% nitric acid (containing 10 mM thiourea and 100 mg L À1 ascorbic acid).…”
Section: Drugs and Reagentsmentioning
confidence: 99%
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“…An aliquot was taken and diluted using 3.6% nitric acid (containing thiourea (10 mM) and ascorbic acid (100 mg L À1 ) to stabilize Os in nitric acid solution). 17 The resulting solution was analysed using a PerkinElmer Optima 5300DV ICP-OES. Calibration standards for Os (50-700 ppb) were freshly prepared in 3.6% nitric acid (containing 10 mM thiourea and 100 mg L À1 ascorbic acid).…”
Section: Drugs and Reagentsmentioning
confidence: 99%
“…Calibration standards for Os (50-700 ppb) were freshly prepared in 3.6% nitric acid (containing 10 mM thiourea and 100 mg L À1 ascorbic acid). 17 Data were acquired and processed using WinLab32 for Windows.…”
Section: Drugs and Reagentsmentioning
confidence: 99%
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“…Due to the known problems concerning the quantification of osmium, several attempts were made by varying the parameters of digestion to avoid oxidizing conditions that may lead to volatile OsO 4 (Lewen, 2011). But neither different proportioning of the digestion acids nor the time point of opening the digestion vessel after cooling down could solve this issue under the described nitric acid conditions in the determination of osmium along with the other 14 elements analyzed by ICP-MS, although promising attempts for stabilization of volatile osmium components were published (Fischer et al, 2014;Venzago et al, 2013). The mean recovery of 48.7% osmium using ICP-MS was too low to quantify under these conditions, and additionally the results varied over a wide range.…”
Section: Instrumentationmentioning
confidence: 99%
“…Em relação ao Os, durante processos de digestão por micro-ondas, pode ocorrer sua oxidação, formando OsO 4 , volátil e tóxico, que pode resultar em um desafio analítico para determinação deste elemento, pois é necessário evitar sua perda devido a volatilização e também prevenir o efeito de memória. As estratégias geralmente utilizadas são a solubilização das amostras em água régia ou ácido clorídrico, ou adição de um estabilizante como a tiouréia -agente complexante do Os, em combinação com ácido ascórbico, após a digestão (FISCHER et al, 2014;HOECKE;CATRY;VANHAECKE, 2012;LI et al, 2015;VENZAGO et al, 2013).…”
Section: Estratégias De Preparo De Amostraunclassified