scholarly journals Determination of Metals in Tree Rings by ICP-MS Using Ash from a Direct Mercury Analyzer

Molecules ◽  
2020 ◽  
Vol 25 (9) ◽  
pp. 2126
Author(s):  
Byunggwon Jeon ◽  
James V. Cizdziel
Keyword(s):  
Tree Rings ◽  
Loblolly Pine ◽  
Acid Digestion ◽  
Shortleaf Pine ◽  
Volatile Elements ◽  
Microwave Assisted ◽  
Direct Mercury Analyzer ◽  
Icp Ms ◽  
Mercury Analyzer

Elemental profiles in cores of tree trunks (bole wood) have been used for environmental monitoring and reconstruction of metal pollution history. Mercury (Hg) is a global pollutant that can be accurately measured in tree rings in a simple and pragmatic fashion using a direct mercury analyzer (DMA) that is based on thermal decomposition, amalgamation, and atomic absorption spectrophotometry. In this feasibility study, we demonstrate that the ash remaining after the DMA analyses can be used to quantify a wide range of other non-volatile elements (Ba, Be, Co, Cr, Cu, Fe, Ga, Mg, Mn, Ni, Pb, Sr, Th, and U) in that same sample of wood by inductively coupled plasma mass spectrometry (ICP-MS) after microwave-assisted acid digestion. Other elements (Ag, Cd, Cs, Rb, Tl, and V) exhibited poor recoveries, possibly due to losses during sample preparation. We assessed the accuracy with reference materials, spikes, and by comparison with EPA Method 3052 (Microwave Assisted Acid Digestion of Siliceous and Organically Based Matrices). For the first group of elements (deemed suitable for the method), recoveries ranged between 80% and 120% and the relative standard deviation was generally < 15%, indicating acceptable precision. We applied the method to five species of trees: eastern red cedar (Juniperus virginiana), loblolly pine (Pinus taeda), shortleaf pine (Pinus echinata), white oak (Quercus alba), and tulip poplar (Liriodendron tulipifera) from Holly Springs National Forest in north Mississippi, USA. Mercury concentrations (ng/g ± SE) were highest in the cedar (1.8 ± 0.3; n = 5), followed by loblolly pine (1.6 ± 0.3, n = 3), shortleaf pine (1.2 ± 0.2; n = 3), oak (1.1 ± 0.2; n = 5), and poplar (0.5 ± 0.1; n = 5). Concentrations of other elements were generally Fe > Mg > Ba ≈ Sr ≈ Mn > Cr ≈ Cu > Ni ≈ Rb > Co > Ga ≈ Ag, with the other elements generally below the method detection limit (MDL). Overall, we showed that the DMA can be used to not only determine total Hg in segments of tree core, but can serve as the ashing step in the preparation of wood for ICP-MS analysis, thus allowing the determination of non-volatile elements along with Hg in the very same sample.

Simultaneous Analysis of 6 Trace Elements in Pomegranate (Punica granatum l.) Juice by ICP-MS after Microwave-Assisted Digestion

2014 ◽  
Vol 998-999 ◽  
pp. 307-311 ◽  
Author(s):  
Li Ping Sun ◽  
Yan Lei Yin ◽  
Chao Wang ◽  
Lei Wang
Keyword(s):  
Trace Elements ◽  
Punica Granatum ◽  
Pomegranate Juice ◽  
Acid Digestion ◽  
Microwave Assisted ◽  
Icp Ms ◽  
Essential Trace Elements ◽  
Punica Granatum L ◽  
Good Agreement

The concentrations of essential trace elements such as Mn, Cu, Zn, Fe, Li and Se were determined in pomegranate juice at distinct maturity stages by ICP-MS following microwave-assisted acid digestion. The digestion efficiency was evaluated on the basis of the determination of residual carbon content and residual acidity. 4 mL of 16 mol/L HNO3 + 2 mL of 30% m/m H2O2 solutions were used for the efficient digestion of 3.0 mL pomegranate juice, with a considerable reduction in the residual acidity when compared with a procedure that employed different Digestion procedures. The good agreement between the observed and certified concentrations of the National Tea Standard (China, GBW10016) and the Apple Standard (China, GBW10019) indicate that the developed analytical method was well suited to determine the trace elements contents in similar matrices.

Comparison of ICP-MS and direct mercury analyzer for the analysis of mercury in pharmaceuticals

Planta Medica ◽  
2015 ◽  
Vol 81 (16) ◽  
Author(s):  
Y Kho ◽  
M Kim ◽  
NY Park ◽  
H Park ◽  
JH Shin
Keyword(s):  
Direct Mercury Analyzer ◽  
Icp Ms ◽  
Mercury Analyzer

scholarly journals Estimation of Cadmium Levels in Local Banana (Musa) Fruits by ICP-MS Technology-A Pan India Study

2020 ◽  
Vol 40 (01) ◽  
Author(s):  
Prachi Sinkar ◽  
Kallathi Kumar ◽  
Kajal Rai ◽  
Syam Praveen Kumar Jeepipalli
Keyword(s):  
Irrigation Water ◽  
Industrial Waste ◽  
Cadmium Accumulation ◽  
Acid Digestion ◽  
Chemical Fertilizers ◽  
Microwave Assisted ◽  
Imminent Danger ◽  
Icp Ms ◽  
Over Exploitation

Industrial waste discharging into the irrigation water is a major cadmium source for plants. Over exploitation of chemical fertilizers in the agriculture is also a growing concern of cadmium accumulation into the plant. Purpose of this study was evaluation of cadmium prevalence in locally available banana fruits across the country. Microwave assisted acid digestion was used to homogenize the banana samples with subsequent analysis by ICP-MS technology. Banana samples from 59 districts of India were analyzed. Among the 59 districts of India, The districts of Tiruchirapalli and Bahraich had having highest cadmium levels respectively, 0.51 - 0.6 ng/g, 0.81 - 0.9 ng/g. Least banana cadmium levels (0-0.19 ng/g) was observed in banana from 28 districts of India. Study concludes that, bio-magnification of cadmium is the imminent danger. Phyotoremediation is welcoming approach.

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 &gt;97% for all elements at both levels with an RSD of &lt;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.

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