scholarly journals Characterization of arsenic in dried baby shrimp (Acetes sp.) using synchrotron-based X-ray spectrometry and LC coupled to ICP-MS/MS

2018 ◽  
Vol 33 (10) ◽  
pp. 1616-1630 ◽  
Author(s):  
Diana Guimarães ◽  
Austin A. Roberts ◽  
Mina W. Tehrani ◽  
Rong Huang ◽  
Louisa Smieska ◽  
...  
Keyword(s):  
Arsenic Content ◽  
Total Arsenic ◽  
Portable Xrf ◽  
X Ray ◽  
As Species ◽  
Icp Ms

Total arsenic content of dried baby shrimp was quantified using portable XRF and ICP-MS, and characterized further by SR-μXRF, with the major As species identified using μXANES, and confirmed by LC-ICP-MS/MS.

scholarly journals Geochemical characterization of the Sutlegen bauxite deposit, SW Antalya

2021 ◽  
Vol 15 (3) ◽  
pp. 108-121
Author(s):  
Ozge Ozer Atakoglu ◽  
Mustafa Gurhan Yalcin
Keyword(s):  
Geochemical Characteristics ◽  
X Ray Diffraction ◽  
Bauxite Deposit ◽  
Multivariate Statistical Methods ◽  
Multivariate Statistical ◽  
X Ray ◽  
Icp Ms ◽  
Plasma Mass Spectrometry ◽  
Practical Implications

Purpose.The purpose is to determine geological and geochemical characteristics of the Sutlegen (Antalya, Turkey) bauxites, to identify the elements that played a major role in their formation. Methods. X-ray diffraction (XRD) mineral phase analysis, X-ray fluorescence (XRF) elemental analysis, plasma-mass spectrometry (ICP-MS), the petrographic and mineralogical analyses, and multivariate statistical methods were used. Findings. The major element content of the ore was determined as Al2O3 (60-35.2 wt%), SiO2 (39.5-0.2 wt%), Fe2O3 (48.4-19.5 wt%), TiO2 (36.9-16 wt%), and P2O5 (0.5-0.1 wt%). The Sutlegen region, which shows epirogenetic action with the uplift of the earth's crust, is generally rich in neritic carbonates. It was revealed that the bauxite ores have undergone moderate and strong laterization as a result of the deferruginization in the environment, and they were classified into four groups as lateritic, ferritic, kaolinitic, and bauxite. The increase in the aluminosilicate minerals, which were formed during the formation of bauxite in the environment was found to be directly proportional to the laterization processes. In this context, it was considered that the lateritic material that was firstly formed in the environment filled the cavities and pores of the karst-type limestones and sedimentary units in the region by superficial transfer phenomena. The bivariate diagrams of Log Cr vs. Log Ni revealed that the bauxite that formed in the region had an ultrabasic source. Originality. In literature, no scientific studies have been found on bauxite mineralization in the Sutlegen deposits that have been operated for a long period. Practical implications. In this context, the geochemical characteristics of bauxites revealed that the source of the laterization process in the region was the ultrabasic igneous rocks. The lateritic material moved by superficial transfer was accumulated on sandstone, claystone, siltstone, and limestone and in karstic cavities; then, it formed karstic bauxite (kaolinitic and bauxite) of different classifications due to the effect of metamorphism.

scholarly journals Arsenic Content, Speciation, and Distribution in Wild Cordyceps sinensis

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Yuancan Xiao ◽  
Cen Li ◽  
Wei Xu ◽  
Yuzhi Du ◽  
Ming Zhang ◽  
...  
Keyword(s):  
Quality Control ◽  
Imaging Techniques ◽  
Arsenic Speciation ◽  
Chemical Form ◽  
Cordyceps Sinensis ◽  
Arsenic Content ◽  
Chemical Forms ◽  
Total Arsenic ◽  
Icp Ms ◽  
Source Studies

The excessive arsenic content in wild Cordyceps sinensis has caused great concerns on human health. The toxicity of arsenic depends on its concentration, chemical form, and valence. The source studies of arsenic in C. sinensis are essential for safety evolution and quality control. We used ICP-MS and HPLC-ICP-MS methods to determine the total arsenic amount and the arsenic speciation. Synchrotron-based XANES and micro-XRF imaging techniques were used to characterize arsenic valence and distribution. The total arsenic amount range in wild C. sinensis samples was 5.77–13.20 μg/g with an average of 8.85 ± 2.5 μg/g. As(III) and As(V) were the main species in wild C. sinensis samples. The iAs only accounts for 4.47–11.42% of the extracted arsenic. Trivalent and pentavalent forms were the dominant chemical forms of arsenic. Besides, we found that arsenic was accumulated at the digestive tract of the host larva.

IN VITRO OSTEO-INDUCTIVE CHARACTERIZATION OF NANO-GRADE PEARL POWDERS

2011 ◽  
Vol 23 (02) ◽  
pp. 135-140
Author(s):  
Mei-Ju Hou ◽  
Chi-Jen Shih
Keyword(s):  
Inductively Coupled Plasma ◽  
Body Fluid ◽  
X Ray Diffraction ◽  
X Ray ◽  
Inductively Coupled ◽  
Icp Ms ◽  
Hydroxyl Apatite ◽  
Inductive Behavior

The main objective of this study is to characterize the in vitro osteo inductive behavior of pearl nano crystallites. The results obtained from X-ray diffraction, Fourier transform infrared (FTIR) spectra, and inductively coupled plasma mass (ICP-MS) analysis demonstrate that the pearls can induce the formation of a hydroxyl apatite (HA) layer on their surface in simulated body fluid (SBF), even after only short soaking periods. Further, MC3T3-E1 cells can easily attach and spread on the pearl powders after 1 h of cultivation.

Chemical-Mineralogical and Microscopic Characterization of Clay Used as Raw Materials in Santa Gertrudes' Ceramic Pole

2016 ◽  
Vol 869 ◽  
pp. 191-194
Author(s):  
Carolina del Roveri ◽  
R.A. Cunha ◽  
Antenor Zanardo ◽  
Letícia Hirata Godoy ◽  
Maria Margarita Torres Moreno ◽  
...  
Keyword(s):  
Raw Materials ◽  
Microscopic Analysis ◽  
Major Elements ◽  
X Ray Diffraction ◽  
Ceramic Tiles ◽  
X Ray ◽  
Mineral Phases ◽  
Icp Ms ◽  
Materials Used

The Santa Gertrudes ́ Ceramic Polo is the Brazilian region with national and international prominence in the manufacturing of ceramic tiles. Some raw materials used by ceramic industry and coatings industries in this region were characterized in terms of chemical-mineralogical and microscopic view, in order to promote the best technological characterization of them. For this, chemical analysis of major elements and trace X-ray diffraction and microscopic analysis by SEM, TEM and Electron microprobe were performed by ICP-MS. The results showed that the raw materials commonly referred to as "clays" are actually constituted by various mineral phases, which directly influence the properties of the same ceramics. Also showed that, by virtue of this constitution, different formulations can be developed, using the best raw materials found in the region of Santa Gertrudes, SP.

Evaluating the applicability of portable-XRF for the characterization of Hokkaido Obsidian sources: a comparison with INAA, ICP-MS and EPMA

2016 ◽  
Vol 309 (1) ◽  
pp. 257-265 ◽  
Author(s):  
Sean C. Lynch ◽  
Andrew J. Locock ◽  
M. John M. Duke ◽  
Andrzej W. Weber
Keyword(s):  
Portable Xrf ◽  
Icp Ms

Characterization of a Jian‐like sherd with the optical microscope, confocal Raman, wavelength‐dispersive X‐ray fluorescence, and portable XRF spectrometers

2020 ◽  
Vol 51 (8) ◽  
pp. 1343-1352 ◽  
Author(s):  
Gulsu Simsek Franci ◽  
Tugce Akkas ◽  
Sinem Yildirim ◽  
Suat Yilmaz ◽  
Ahmet Nejat Birdevrim
Keyword(s):  
Optical Microscope ◽  
Portable Xrf ◽  
X Ray ◽  
Confocal Raman

Characterization of Uranium Speciation in a Metallic Matrix

2002 ◽  
Vol 757 ◽  
Author(s):  
Gini Curran ◽  
Patrick G. Allen ◽  
Daniel F. Caputo ◽  
Ken R. Czerwinski
Keyword(s):  
Gamma Spectroscopy ◽  
Metallic Matrix ◽  
Elemental Content ◽  
Spectroscopy Analysis ◽  
X Ray ◽  
Uranium Speciation ◽  
Icp Ms ◽  
High Concentrations ◽  
X Ray Absorption

ABSTRACTThree metallic slag samples recovered from the site of their inadvertent creation several decades after the fact were sectioned and analyzed to determine uranium speciation to evaluate environmental behavior as well as assess proliferation resistance of the waste form. Uranium concentration in the highly inhomogeneous samples was up to 5% by weight as determined by gamma spectroscopy. Sample sections were milled in a hardened steel ball mill for x-ray absorption spectroscopy analysis (XAS). Powders were digested in a mixture of heated concentrated nitric acid and peroxide and analyzed for elemental content using ICP-AES and ICP-MS. Though elemental content of the samples varied widely, high concentrations of Al were consistently found. Other metals of significance were Ti, Fe, Ni, Cu, Zn, and Sn. High Pb concentrations were occasionally found. XAS analysis revealed the samples contained primarily uranyl and another phase identified as a uranium-aluminum melt.

scholarly journals Measuring heavy metal content in bone using portable X-ray fluorescence

2014 ◽  
Vol 2 (1) ◽  
Author(s):  
Nicole C. Little ◽  
Victoria Florey ◽  
Irma Molina ◽  
Douglas W. Owsley ◽  
Robert J. Speakman
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Inductively Coupled Plasma ◽  
Analytical Techniques ◽  
Human Populations ◽  
Portable Xrf ◽  
X Ray ◽  
Icp Ms ◽  
Time Required ◽  
Xrf Analyses

The ability of inorganic-based analytical chemistry techniques to quantify trace amounts of heavy metals in skeletal remains has been integral for understanding health and social status in human populations. Low detection limits and the sensitivity of inductively coupled plasma- mass spectrometry (ICP-MS) and other techniques to most elements on the periodic table are ideally suited for the quantification of lead (Pb) and other heavy metals in bone. However, the time required for sample preparation and analysis, expense, destructive analytical process, and availability of instrumentation often limit researchers’ ability to utilise these techniques for archaeological applications. This paper explores the use of portable X-ray fluorescence (XRF) instrumentation for heavy metal analysis of bone as an alternative to more traditional analytical techniques. XRF has been shown to be an extremely useful tool for archaeologists seeking to conduct quantitative analyses of cultural materials such as obsidian and metals. However, little research has been undertaken to assess the usefulness of portable XRF for measuring heavy metals found in low concentrations in archaeological bone. This paper compares data derived from ICP-MS and portable XRF analyses of bone. Results demonstrate that XRF analyses of bone are problematic due to diagenesis and variability of Pb content in bone.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

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