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Showing 1 to 17 of 17 for “"HPLC-ICP-MS"”.
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Environmental speciation of tin and lead by HPLC-ICP-MS
… inductively coupled plasma-mass spectrometer (ICP-MS) for this application has been modified to yield limits of detection of 0.44,0.26,1.4 and 0.23 ng. g-' as Sri for TBT, TPhT, DBT and MBT respectively. Different extraction procedures have been tested for the determination of organotin species …
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Speciation Analysis of Arsenic and Selenium by HPLC and Mass Spectrometry
… respectively. Work was undertaken, using HPLC-ICP-MS instrumentation, as part of a feasibility study, into the production and certification of six new reference materials; these being analyzed for the species of arsenic, in chicken, fish, rice and soil samples, and selenium, in wheat and …
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DEVELOPMENT OF IMPROVED METHODS FOR THE ANALYSIS OF METALLOPORPHYRINS IN COALS, SEDIMENTS AND OILS
… coupled plasma-mass spectrometry (ICP-MS) interface was successfully developed which allowed the analysis of metalloporphyrins (Retention Index >6000), with detection limits of less than 1 nanogram on column. The system was used together with conventional HTGC-flame ionization …
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The Development of High Accuracy Methods for the Measurement of Metal Speciation
… isotope dilution mass spectrometry (ssIDMS) analysis of a protein. A ®^Cu enriched copper binding Rc spike was prepared from Rc produced using a bacterial recombinant system. The stability of the ®^Cu binding spike was investigated using both inductively coupled plasma mass spectrometry …
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Arsenic Speciation in Food
… coupled plasma-mass spectrometry (HPLC-ICP-MS) method has been developed for the separation and quantification of ~g kg-1 levels of arsenobetaine, monomethylarsonic acid (MMAA), dimethylarsinic acid (DMAA) , arsenite and arsenate. Using this coupling, arsenic species in fruit and …
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Interfacing High Performance Liquid Chromatography with Inductively Coupled Plasma Mass Spectrometry for Speciation Studies
… of high performance liquid chromatography (HPLC) with inductively coupled plasma mass spectrometry (ICP-MS) for the speciation of organometallic compounds has been developed and utilised for a number of diverse applications. Desolvation of the sample prior to reaching the plasma is shown to …
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Total arsenic and arsenic speciation in indigenous food stuffs
… tissue and vegetable crops were determined by ICP-MS following microwave-assisted acid digestion using nitric acid/hydrogen peroxide, trypsin and cellulase enzymatic extraction procedures. The extracted arsenic species were then quantified using HPLC-ICP-MS. A dilute nitric acid (1 % (v/v)) …
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Desarrollo de metodologías analíticas para el estudio del metabolismo del azufre utilizando isótopos estables enriquecidos
… los límites de variabilidad natural. Los equipos ICP-MS multicolectores permiten realizar medidas de relaciones isotópicas de azufre con excelentes precisiones instrumentales, necesarias para la determinación de variaciones isotópicas naturales. Tradicionalmente, los estudios de metabolismo con …
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IRON AND MANGANESE SPECIATION AND METHOD DEVELOPMENT FOR THE ANALYSIS OF WATER FROM PROCESSING PLANTS
… coupled plasma optical emission spectroscopy ICP-OES and inductively coupled plasma mass spectrometry ICP-MS. These two methods were validated using a standard reference material (SRM) and good accuracy was achieved with spiked addition methods. Further,The results showed good relative …
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Investigation of nutrient solutions for the hydroponic growth of plants
… in plant tissue. Techniques including MALDI-MS, LA-ICP-MS and HPLC-ICP-MS have been utilized in the work presented here to demonstrate the distribution and accumulation of elements and compounds within plant material that has been grown hydroponically. The use of a zinc based seed coating as …
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Environmental mineralogy of gold recovery from refractory gold-arsenic-bearing Bakyrchik concentrates
… and this can accelerate the natural mechanisms of As mobilization. The Bakyrchik is the largest gold deposit in Kazakhstan and one of the largest in the world. Gold (Au) is dispersed in pyrite and arsenopyrite in the form of microscopic inclusions. Despite the fact that only 10% of gold ore …
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The Development of Analytical Procedures for Analysis of Trace Metals in Pharmaceutical Formulations and the Speciation of Arsenic in Antacids
… coupled plasma optical emission spectroscopy (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS). The aim of this work was to develop, optimise and validate analytical methods for the determination of Class 1 and Class 2A elements, arsenic (As), cadmium (Cd), mercury (Hg),lead …
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Síntesis de levaduras enriquecida en azufre 34 y su aplicación en estudios clínicos y metabólicos
… general y la espectrometría de masas con fuente ICP en particular abre la posibilidad de nuevas estrategias analíticas dentro de este campo. En nuestro caso, basándonos en estudios previos realizados en nuestro laboratorio, hemos evaluado la posibilidad de utilizar las medidas de relaciones …
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Isótopos estables para la especialización cuantitativa de zinc en leche y para investigar la biodisponibilidad y metabolismo de nuevos fortificantes de hierro en leche fórmula
… y motor del recién nacido. Se evaluó mediante ICP-MS la variación de los niveles y de las especies de Zn presentes en la leche materna (n= 124) a lo largo del periodo de lactancia: calostro, leche de transición (7,14 días tras el parto) y leche madura (28 días tras el parto) y dependiendo de la …
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Development and validation of quantitative methods for the analysis of clinical biomarkers of iron metabolism applying stable isotopes
… in serum. Serum ferritin concentration forms part of a series of biomarkers routinely determined in clinical laboratories to assess the iron status in patients. However, the determination of ferritin-bound iron in serum could offer a higher potential to diagnose iron disorders than pure …