Detection and characterization of artefact compounds during selenium speciation analysis in yeast by ICP-MS-assisted MALDI MS, oMALDI MS/MS and LC-ES-MS/MS

2006 ◽  
Vol 21 (7) ◽  
pp. 703-707 ◽  
Author(s):  
M. Dernovics ◽  
L. Ouerdane ◽  
L. Tastet ◽  
P. Giusti ◽  
H. Preud’homme ◽  
...  
Keyword(s):  
Speciation Analysis ◽  
Maldi Ms ◽  
Selenium Speciation ◽  
Icp Ms

Selenium speciation analysis of selenium-enriched supplements by HPLC with ultrasonic nebulisation ICP-MS and electrospray MS/MS detection

2004 ◽  
Vol 19 (12) ◽  
pp. 1529-1538 ◽  
Author(s):  
Heidi Goenaga Infante ◽  
Gavin O’Connor ◽  
Margaret Rayman ◽  
Raimund Wahlen ◽  
John Entwisle ◽  
...  
Keyword(s):  
Speciation Analysis ◽  
Selenium Speciation ◽  
Ms Detection ◽  
Icp Ms

scholarly journals Selenium speciation analysis of selenium-enriched food sprouts

2014 ◽  
pp. 23-28
Author(s):  
Éva Bódi ◽  
Dávid Andrási ◽  
Béla Kovács
Keyword(s):  
Citric Acid ◽  
Sample Preparation ◽  
Speciation Analysis ◽  
Selenium Speciation ◽  
Selenium Content ◽  
Selenium Species ◽  
Extraction Solvent ◽  
Icp Ms ◽  
Significant Difference ◽  
Total Selenium

In this present study, we prepared selenium-enriched pea and wheat sprouts. During our research we aimed not only to measure the total selenium content of the sprouts but to identify different selenium species. Scientifical researches show why the analytical examination of different selenium (Se) species is necessary: consumption of all kind of Se-species is useful for a person who suffers in selenium deficit, while there is significant difference between effects of different Se-species on person, in whose body the Se-level is just satisfactory. Biological availability, capitalization, accumulation, toxicity of Se-species are different, but the main difference was manifested in the anti-cancer effect of selenium. During our research selenium was used in form of sodium selenite and sodium selenate, the concentration of the solutions used for germination was 10 mg dm-3. Control treatment meant germination in distilled water. Total selenium content of sprout samples was measured after microwave digestion by inductively coupled plasma mass spectrometry (ICP-MS). Different extraction solvents were applied during sample preparation in order to separate different Se-species (0.1 M and 0.2 M HCl or 10 mM citric acid buffer). We wanted the following question to be answered: Which extraction solvent resulted the best extraction efficiency? Selenium speciation analysis of sprout sample extracts was performed by high performance liquid chromatography with anion exchange column, detection of selenium species was performed by ICP-MS. Evaluating our experimental results we have been found that significant amount of selenium of inorganic forms used during germination transformed into organic selenium compounds. There was difference between the amount of Se-species in pea and wheat sprouts and selenium uptake and repartition of selenium species were depended on Se-form used during germination. In addition the chromatogram analysis made us clear as well, that the citric acid solvent proved to be the most effective extraction solvent during sample preparation int he view of organic Se species.

Characterization of Different Types of Biomass Wastes Using Thermogravimetric and ICP-MS Analyses

2020 ◽  
Vol 70 (12) ◽  
pp. 4594-4600
Keyword(s):  
Thermogravimetric Analysis ◽  
Food Industry ◽  
Wood Waste ◽  
Biomass Ash ◽  
Minor Elements ◽  
Ms Analysis ◽  
Icp Ms ◽  
Different Types

The purpose of this study was to characterize some types of biomass wastes resulted from different activities such as: agriculture, forestry and food industry using thermogravimetric and ICP-MS analyses. Also, it was optimized an ICP-MS method for the determination of As, Cd and Pb from biomass ash samples. The ICP-MS analysis revealed that the highest concentration of metals (As, Cd, Pb) was recorded in the wood waste ash sample, also the thermogravimetric analysis indicated that the highest amount of ash was obtained for the same sample (26.82%). The biomass wastes mentioned in this study are alternative recyclable materials, reusable as pellets and briquettes. Keywords: ash, biomass, ICP-MS, minor elements, TG

Matrix effects using an ICP-MS with a single positive ion lens and grounded stop: analyte mass dependent?

2017 ◽  
Vol 32 (5) ◽  
pp. 951-966 ◽  
Author(s):  
John W. Olesik ◽  
Shi Jiao
Keyword(s):  
Gas Flow ◽  
Matrix Effects ◽  
Mass Matrix ◽  
Gas Flow Rate ◽  
Icp Ms ◽  
Single Positive ◽  
Mass Dependent ◽  
Positive Ion ◽  
Comprehensive Characterization

Comprehensive characterization of ICP-MS matrix effects as a function of analyte mass, matrix mass, lens voltage and nebulizer gas flow rate was carried out.

scholarly journals Mercury determination and speciation analysis in surface waters

2012 ◽  
Vol 10 (4) ◽  
pp. 1175-1182 ◽  
Author(s):  
Elisaveta Mladenova ◽  
Ivanka Dakova ◽  
Dimiter Tsalev ◽  
Irina Karadjova
Keyword(s):  
Surface Waters ◽  
Inductively Coupled Plasma ◽  
Mechanical Stability ◽  
Solid Phase ◽  
Chemical Vapor ◽  
Speciation Analysis ◽  
Regeneration Ability ◽  
Mercury Species ◽  
Icp Ms ◽  
Relative Standard

AbstractA sorbent L-cysteine grafted silica gel has been evaluated for separation and enrichment of dissolved inorganic i-Hg(II) and methylmercury CH3Hg(I) from surface waters at sub-µg L−1 concentrations. Chemical parameters for mercury species enrichment and separation have been optimized. Analytical schemes for the determination of Hg species, using selective column solid phase extraction (SPE) with continuous flow chemical vapor generation atomic absorption spectrometry (CF-CVG-AAS) or inductively coupled plasma-mass spectrometry (ICP-MS) were developed. Possibilities for on-site SPE enrichment were demonstrated as well. The limits of quantification were 1.5 and 5 ng L−1 for dissolved i-Hg(II) and CH3Hg(I) by CF-CVG-AAS and 1 and 2.5 ng L−1 by ICP-MS with relative standard deviations between 7–12% and 7–14%, respectively. The chemically modified SPE sorbent has demonstrated high regeneration ability, chemical and mechanical stability, acceptable capacity and good enrichment factors. Results for total dissolved mercury were in reasonable agreement with those from independent analyses by direct ICP-MS determinations for river waters and for estuarine water certified reference material.

Optimization and Characterization of Biogenic Silver Nanoparticles Synthesized by Leaves Extract of Alphonsea Madraspatana

2021 ◽  
Vol 17 ◽  
Author(s):  
Amita Sahu ◽  
Sudhanshu Shekhar Swain ◽  
Goutam Ghosh ◽  
Deepak Pradhan ◽  
Dipak Kumar Sahu ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Volume Ratio ◽  
Xrd Analysis ◽  
Biofilm Inhibition ◽  
Nano Silver ◽  
E Coli ◽  
Biogenic Silver Nanoparticles ◽  
Icp Ms ◽  
Anti Oxidant

Background: Literature evidences as well as traditional uses of genus Alphonsea reveal significant antimicrobial and anti-oxidant activity, which encourages to consider A. madraspatana to have potent antimicrobials, there by offering potential adjuncts to synthesize improved antimicrobial Silver nanoparticles (AgNPs). The objective of the present exposition is to optimize reaction parameters to synthesize antimicrobial Biogenic Silver nanoparticles (BAgNPs) from extract of A. madraspatana leaves (AML) and to evaluate the effect against bacteria. Methods: BAgNPs was synthesized by optimized reaction. The Synthesized nanoparticles were characterized by UV, IR, ICP-MS and XRD analysis. The antibacterial potency of optimized BAgNPs was evaluated against E. coli by comparing with positive controls. Results: Results of optimization process indicate nanoscale BAgNPs were produced at operating temp. of 45°C for 120 min at pH 8 with 1:5 volume ratio of AgNO3 and extract. Optimized BAgNPs exhibits relatively higher antimicrobial activity (31±1mm) compared to Ciprofloxacin (27±1mm) and marketed nano silver (28± 2 mm). The developed BAgNPs shows comparable biofilm inhibition (86.50%) as compared to marketed nano silver (88.10%) and Ciprofloxacin (83.10%). Conclusion: Experimental evidence suggests methanolic extract of AML under predefined conditions successfully generate nano-template of silver with better antibacterial response against E. coli.

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