Direct analysis of radium-226 in sediment by ICP-MS: an analytical challenge?

2019 ◽  
Vol 34 (8) ◽  
pp. 1597-1605 ◽  
Author(s):  
Hamza Ben Yaala ◽  
Rihab Fniter ◽  
Delphine Foucher ◽  
Olivier Clarisse
Keyword(s):  
Direct Analysis ◽  
Analytical Challenge ◽  
Natural Sediment ◽  
Icp Ms ◽  
Low Levels

Low levels of radium-226 were accurately measured in natural sediment digests using single quadrupole ICP-MS.

Direct analysis of cotton swipes for plutonium isotope determination by microextraction-ICP-MS

2021 ◽  
Author(s):  
Benjamin T Manard ◽  
Shalina Metzger ◽  
Kayron T. Rogers ◽  
Brian W. Ticknor ◽  
N. Alex Zirakparvar ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Environmental Sample ◽  
Direct Analysis ◽  
Plutonium Isotope ◽  
Low Level ◽  
Icp Ms ◽  
Isotope Determination

This study demonstrates a method for determining the isotopic composition of low-level (sub-pg) plutonium (Pu) directly from a cotton swipe. Environmental sample (ES) swipes are routinely employed as a tool...

Determination of multi-element concentrations at ultra-low levels in alternating magnetite and pyrite by HR-ICP-MS using matrix removal and preconcentration

2016 ◽  
Vol 127 ◽  
pp. 237-246 ◽  
Author(s):  
Wenjun Li ◽  
Changle Wang ◽  
Bingyu Gao ◽  
Yating Wang ◽  
Xindi Jin ◽  
...  
Keyword(s):  
Element Concentrations ◽  
Icp Ms ◽  
Matrix Removal ◽  
Low Levels

Determination of Heavy Metals in Wheat and Barley Grains Using ICP-MS/MS

2020 ◽  
Vol 103 (5) ◽  
pp. 1277-1281
Author(s):  
Tamer M A M Thabit ◽  
Shokr Abdelsalam Shokr ◽  
Dalia I H Elgeddawy ◽  
Medhat A H El-Naggar
Keyword(s):  
Heavy Metals ◽  
Acid Digestion ◽  
Validation And Verification ◽  
European Origin ◽  
Three Samples ◽  
Icp Ms ◽  
Two Samples ◽  
Low Levels ◽  
Barley Grains

Abstract Wheat and barley grains are two of the most important nutritional grains for humans and animals and they play an essential role in the nutritional cycle by different ratios according to people's nutritional habits. This work aimed to monitor ten of the most important heavy metals in some European-origin wheat and barley grains during the season of 2018. The measured elements, Al, As, Cd, Co, Cr, Hg, Mo, Ni, Pb, and V, are of importance ecologically and biologically and may be involved in many health disorders affecting the human body. Moisture, protein, and specific grain weights were checked. Samples were digested using microwave acid digestion and the elements measured with ICP-MS/MS in He mode to increase sensitivity, lower the background, and avoid interference. Method validation and verification were carried out through spiking at two levels (2.0 and 10 ppb), then RSD, LOD, and LOQ were calculated. Recoveries were >97% for all elements at both levels with an RSD of <7.6%. Results revealed that As, Cd, Hg, and Pb were not detected in most wheat and barley samples, whereas Cd was detected in one sample of Ukrainian wheat and two samples of Estonian barley (but in very small traces). Pb was detected in three samples of Polish wheat (in very small traces). Al, Mo, and Ni were detected in some samples of wheat and barley of all origins, whereas other elements were at very low levels considered to be negligible concentrations.

scholarly journals Effect of Cosolutes on the Sorption of Phenanthrene onto Mineral Surface of River Sediments and Kaolinite

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Yinghong Wu ◽  
Fang Liu ◽  
Wen Zhang ◽  
Lei Wang
Keyword(s):  
Organic Contaminants ◽  
Water Distribution ◽  
River Sediments ◽  
Distribution Coefficients ◽  
Organic Carbon Content ◽  
Mineral Surface ◽  
Natural Sediment ◽  
Obvious Effect ◽  
Freundlich Model ◽  
Low Levels

Sorption of phenanthrene onto the natural sediment with low organic carbon content (OC%), organic-free sediment, and kaolinite was investigated through isotherm experiments. Effects of cosolutes (pyrene, 4-n-nonyphenol (NP), and humic acid (HA)) on phenanthrene sorption were also studied by comparing apparent solid-water distribution coefficients (Kdapp) of phenanthrene. Two addition sequences, including “cosolute added prior to phenanthrene” and “cosolute and phenanthrene added simultaneously,” were adopted. The Freundlich model fits phenanthrene sorption on all 3 sorbents well. The sorption coefficients on these sorbents were similar, suggesting that mineral surface plays an important role in the sorption of hydrophobic organic contaminants on low OC% sediments. Cosolutes could affect phenanthrene sorption on the sorbents, which depended on their properties, concentrations, and addition sequences. Pyrene inhibited phenanthrene sorption. Sorbed NP inhibited phenanthrene sorption at low levels and promoted sorption at high levels. Similar to NP, effect of HA on phenanthrene sorption onto the natural sediment depended on its concentrations, whereas, for the organic-free sediment and kaolinite, preloading of HA at high levels led to an enhancement in phenanthreneKdappwhile no obvious effect was observed at low HA levels; dissolved HA could inhibit phenanthrene sorption on the two sorbents.

Direct analysis of elemental biodistribution in pea seedlings by LA-ICP-MS, EDX and confocal microscopy: Imaging and quantification

2016 ◽  
Vol 128 ◽  
pp. 305-311 ◽  
Author(s):  
Anetta Hanć ◽  
Arleta Małecka ◽  
Agnieszka Kutrowska ◽  
Agnieszka Bagniewska-Zadworna ◽  
Barbara Tomaszewska ◽  
...  
Keyword(s):  
Confocal Microscopy ◽  
Direct Analysis ◽  
Microscopy Imaging ◽  
Pea Seedlings ◽  
Icp Ms ◽  
Confocal Microscopy Imaging

scholarly journals Using heterokaryons to understand pluripotency and reprogramming

2011 ◽  
Vol 366 (1575) ◽  
pp. 2260-2265 ◽  
Author(s):  
Francesco M. Piccolo ◽  
Carlos F. Pereira ◽  
Irene Cantone ◽  
Karen Brown ◽  
Tomomi Tsubouchi ◽  
...  
Keyword(s):  
Nuclear Transfer ◽  
Pluripotent Stem Cell ◽  
Direct Analysis ◽  
Differentiated Cells ◽  
Molecular Events ◽  
Alternative Approach ◽  
Low Levels ◽  
Stem Cell Lines ◽  
High Throughput Screens ◽  
Experimental Strategies

Reprogramming differentiated cells towards pluripotency can be achieved by different experimental strategies including the forced expression of specific ‘inducers’ and nuclear transfer. While these offer unparalleled opportunities to generate stem cells and advance disease modelling, the relatively low levels of successful reprogramming achieved (1–2%) makes a direct analysis of the molecular events associated with productive reprogramming very challenging. The generation of transient heterokaryons between human differentiated cells (such as lymphocytes or fibroblasts) and mouse pluripotent stem cell lines results in a much higher frequency of successful conversion (15% SSEA4 expressing cells) and provides an alternative approach to study early events during reprogramming. Under these conditions, differentiated nuclei undergo a series of remodelling events before initiating human pluripotent gene expression and silencing differentiation-associated genes. When combined with genetic or RNAi-based approaches and high-throughput screens, heterokaryon studies can provide important new insights into the factors and mechanisms required to reprogramme unipotent cells towards pluripotency.

scholarly journals Novel use of XRF in the adsorption processes for the direct analysis of cadmium and silver in absorbent Na-alginate beads

2020 ◽  
Vol 17 (4) ◽  
pp. 1139
Author(s):  
Nadia Mahmoud Tawfiq Jebril Jebril
Keyword(s):  
Inductively Coupled Plasma ◽  
Alginate Bead ◽  
Comparative Method ◽  
Direct Analysis ◽  
Alginate Beads ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Adsorption Processes ◽  
Plasma Mass Spectrometry ◽  
As Adsorption

         The Na-alginate bead is commonly used in biotechnology fields such as adsorption due to ion exchange between Ca and Na with elements. Scanning electron microscopy (SEM-EDX) has proven to be a comparative method in the detections of these adsorbed elements, but the un-flat forming area of beads that can introduce impossible of the detection of element adsorbed. In contrast, X-ray fluorescence (XRF) documents analysis of elements, direct examination, which may analysis the adsorbents of elements. Here, this Study evaluated the possibility by using XRF for the direct analysis for examples of Cd and Ag in a bench stand. This Study compared this to commonly used SEM-EDX and inductively coupled plasma mass spectrometry (ICP-MS) approaches for Cd and Ag analyses. Overall, novel use of XRF provided precise analyses of the concentrations of Cd and Ag adsorbed within Na-alginate bead and revealed analyses not determined the concentrations in standard SEM-EDX or previously established in other studies of  Na-alginate beads. In addition, this Study shows that XRF may be employed in different fields in biotechnology to analysis the concentrations regarding the elemental adsorption of Na-alginate beads and demonstrate the potential for XRF to monitor the procedures underpinning biotechnology sectors.

scholarly journals Evaluation of Direct Analysis for Trace Elements in Tea and Herbal Beverages by ICP-MS

2015 ◽  
Author(s):  
Raquel F. Milani ◽  
Marcelo A. Morgano ◽  
Elisabete S. Saron ◽  
Fabio F. Silva ◽  
Solange Cadore
Keyword(s):  
Trace Elements ◽  
Direct Analysis ◽  
Icp Ms
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