Ramon Barnes

Followers

Following

Co-authors

Public Views

Alison McAnena

Rutgers, The State University of New Jersey

John K Warren

Chulalongkorn University

Marisa Rozalen

Instituto Andaluz de Ciencias de la Tierra UGR-CSIC

Denis Roy

Université Laval

Rajaram S . Mane

Swami Ramanand Teerth Marathwada University, Nanded

Edward Bormashenko

Ariel University

Kurt Panter

James Bashkin

University of Missouri - St. Louis

Cristina Mogosan

University of Medicine and Pharmacy "Iuliu Hatieganu" Cluj-Napoca

Haroldo C . Pinto

USP

Interests

Uploads

Papers by Ramon Barnes

Comparison of microwave-assisted extraction and waste extraction test (WET) preparation for inductively coupled plasma spectroscopic analyses of waste samples

Analytical and Bioanalytical Chemistry, Aug 21, 2002

The Waste Extraction Test (WET) is used in California as a complement to the Toxicity Characteris... more The Waste Extraction Test (WET) is used in California as a complement to the Toxicity Characteristic Leaching Procedure (TCLP). The WET protocol consists of shaking a sample with citrate buffer and determining the metal content in the solution produced. This procedure requires a 1-to-10 waste-to-liquid ratio and 48 h for extraction. Although the WET protocol proves to be very useful, it is a time-consuming step in the determination of leaching and mobility. Therefore, a microwave extraction procedure was optimized to emulate the relative extraction efficiency obtained by the WET protocol. Lead, arsenic, and copper concentrations were measured by inductively coupled plasma mass or atomic spectrometry (ICP-MS or ICP-AES), following a strict quality assurance protocol. Results obtained with this new methodology were statistically comparable to those obtained by the WET protocol. This microwave extraction approach proved simple and fast, reducing sample treatment by almost 280%. A significant reduction also occurs in waste production, materials, labor, and chemical usage. Therefore, the microwave extraction procedure is recommended as a rapid and cost effective monitoring tool for waste samples when combined with or supplemented by the traditional WET protocol.

Download

Dynamics of heat, mass and momentum transfer in an inductively coupled plasma

Final Report, Mar 1, 1984

$Research paper thumbnail of Chapter 4 Field-flow fractionation-inductively coupled plasma-mass spectrometry$

Chapter 4 Field-flow fractionation-inductively coupled plasma-mass spectrometry

Advances in atomic spectroscopy, 2002

$Research paper thumbnail of Flow field-flow fractionation-inductively coupled plasma mass spectrometry for sediment bound trace metal characterization$

Flow field-flow fractionation-inductively coupled plasma mass spectrometry for sediment bound trace metal characterization

Journal of Analytical Atomic Spectrometry, 2002

ABSTRACT

Flow and temperature fields in a free discharge inductively coupled plasma

... The recirculation eddy gives rise to a back flow of 4.7 m/s. The inward electromagnetically i... more

Emission spectrometry

Analytical Chemistry, Apr 1, 1972

Sample analysis by on-line isotope dilution inductively coupled plasma mass spectrometry

Journal of Analytical Atomic Spectrometry, 1989

... 4 761 Sample Analysis by On-line Isotope Dilution Inductively Coupled Plasma Mass Spectrometr... more

Computer Simultation of Decomposition of Al2O3 in an Oxygen Plasma

Zeitschrift für Physikalische Chemie, 1988

In recent years thermal plasmas have become important reaction media for both homogeneous and het... more In recent years thermal plasmas have become important reaction media for both homogeneous and heterogeneous processes. The direct analysis of solid is an important task in analytical methods development. A number of proposals have been made [1-7] for the direct introduction of solid particles into plasmas. The behaviour of A1203 injected along the axis of argon and nitrogen thermal plasmas have been already studied [8-9]. Experiments were performed to determine the extent of decomposition as a function of particle size, distance traveled in the plasma and power input. One of the most important characteristics which distinguishes ICP's in molecular gases from the argon ICP is the influence of chemical reactions on plasma processes [10-15], It is known that space temperature distribution depends on the plasma energy balance [16-17]. Heat conductivity depends a great extent on chemical reactions between main plasma components. Reaction of recombination and dissociation are predominant in the case of oxygen ICP. Transfer of reaction energy determines the radial temperature of the plasma as well as the radius of the plasma. In designing ICP systems for practical application such as spectrochemical analysis or crystal growth is useful to calculate the energy transfer to the particles of injected material as they pass through plasma. Experimentally is shown that an oxygen ICP discharged at atmospheric pressure [13 -14] has smaller diameter than an ICP discharged in air or nitrogen [10-11]. This is due to the dissociation energy of oxygen (5.1 eV) being lower than the dissociation energy of nitrogen (9.9 eV). Having in mind these characteristics of oxygen ICP it was of interest to examine how these hot media can affect the decomposition of solid particles of A1203 .

Preliminary adult soil ingestion estimates: Results of a pilot study

Regulatory Toxicology and Pharmacology, Aug 1, 1990

This study was originally part of a large childhood soil ingestion study and was used to validate... more This study was originally part of a large childhood soil ingestion study and was used to validate part of the analytical methodology used in that larger study. The adult study followed the soil tracer methodology of the children's study. The principal findings of the adult study revealed that the four most reliable tracer elements based on recovery studies in a mass balance assessment [aluminum (A1), silicon (Si), yttrium (Y), and zirconium (Zr)] yielded the following mean daily adult soil ingestion estimations: A1 (77 rag), Si (5 mg), Y (53 rag), and Zr (22 rag). The median daily soil ingestion estimations based on these same tracer elements were: A1 (57 rag), Si (1 mg), Y (65 rag), and Zr (-4 mg). These findings represent the first published quantitative estimates of soil ingestion by adults.

Download

Application of liquid-layer solid-sample spark technique to spectrochemical spark source

Improved analytical results were obtained when a thin layer of water or aqueous solution was aspi... more Improved analytical results were obtained when a thin layer of water or aqueous solution was aspirated onto the surface of a flat metal sample during spark analysis. Studies with liquid layers applied to aluminum alloy standards demonstrated that increased sampling and line emission produced increased analytical curve slopes and count precision for the determination of impurities. Spark exposure times were reduced by one-half to one-fifth. The solute from a solution layer was used to replace the aluminum internal standard in both the spark analysis of aluminum alloys and the dc a r c analysis of the sample electrode material vapor deposited on the counter electrode. spheric elements and from the counter electrode material was minimized, and the physical appearance of the spark c r a t e r showed no oxide formation. Inductance of the spark circuit and aspiration rate influences were investigated. Application of this method to the analysis of refractory and superalloys is indicated by the results of the analysis. I , In spark analysis when a liquid layer was applied, interfering emission from atmo

Download

$Research paper thumbnail of Flow field-flow fractionation-inductively coupled plasma mass spectrometry and metal speciation in proteins: A feasibility study$

Flow field-flow fractionation-inductively coupled plasma mass spectrometry and metal speciation in proteins: A feasibility study

Journal of Analytical Atomic Spectrometry, 1999

ABSTRACT

Determination of major, minor and trace elements in bone by inductively-coupled plasma emission spectrometry

Analytica Chimica Acta, 1983

ABSTRACT An analytical method was developed for the determination of three major (Li, Ni and Co) ... more ABSTRACT An analytical method was developed for the determination of three major (Li, Ni and Co) and fourteen minor or trace elements (Al, Ba, Ca, Cu, Cr, Fe, K, Mg, Mn, Na, Si, Sr, Ti and V) in LiNi1-xCoxO2 (x=0.2-0.8) ceramic powders by inductively coupled plasma optical emission spectrometry. Sample dissolution was achieved by 25% nitric acid digestion in a microwave oven. For each element, an analytical line free from spectral interferences was selected. A detailed study of matrix effects over a wide interval of total excitation energy (TEE) lines (1.62-16.50 eV) was performed at near-robust plasma conditions. A remarkable enhancement in atomic lines with TEE&amp;amp;amp;lt;4 eV was noticed, whereas a significant reduction in atomic and ionic lines with TEE&amp;amp;amp;gt;4 eV was observed. The extrapolation to infinite dilution method was successfully used to overcome these nonspectroscopic interferences. Detection limits (3sigma) varied from 0.21 mg kg-1 for Sr to 49.7 mg kg-1 for Na. The precision of determination (obtained as the relative standard deviation) was lower than 1% for the major elements Li, Ni and Co and between 0.69 and 10% for minor and trace elements. The accuracy of the method ranged from 91 to 101% for major elements, and from 90 to 110%, or close to this range, for most of the impurities in both of the samples studied.

Mutual spectral interferences on selected analytical lines ofrare earth elements in inductively coupled argon plasma atomicemission spectrometry

Mutual spectral interferences on selected analytical lines of rare earth elements in inductively ... more

Dissolution of Al-Fe materials and analysis by inductively coupled plasma - atomic emission spectrometry

Fresenius Journal of Analytical Chemistry, Nov 6, 1998

A technique was developed for the dissolution of Al-Fe materials containing difficult to dissolve... more A technique was developed for the dissolution of Al-Fe materials containing difficult to dissolve Al 2 O 3. The developed procedure uses HCl and HNO 3 for initial sample attack followed by digestion with a mixture of H 3 PO 4 and H 2 SO 4 at 200°C. This procedure was employe to dissolve Al-Fe material samples before the determination of Al and Fe. Minor and trace elements (B, Cr, Cu, Mo, Si, Zr) were determined after dissolution in HCl and HNO 3. Results of a round robin study verified the procedure accuracy. The developed methods have the required accuracy and precision to be used as a quality control procedure for Al-Fe materials analysis.

Download

Epidemiological Study to Estimate How Much Soil Children Eat

2020 Winter Conference on Plasma Spectrochemistry, January 13–18, 2020, Tucson, Arizona

Journal of Analytical Atomic Spectrometry, 2020

Guest Editor Ramon M. Barnes introduces this year’s themed collection on the Winter Conference on... more

Urinary arsenic speciation profile in ethnic group of the Atacama desert (Chile) exposed to variable arsenic levels in drinking water

Journal of Environmental Science and Health, Part A, 2014

Ethnic groups from the Atacama Desert (known as Atacameños) have been exposed to natural arsenic ... more Ethnic groups from the Atacama Desert (known as Atacameños) have been exposed to natural arsenic pollution for over 5000 years. This work presents an integral study that characterizes arsenic species in water used for human consumption. It also describes the metabolism and arsenic elimination through urine in a chronically exposed population in northern Chile. In this region, water contained total arsenic concentrations up to 1250 μg L(-1), which was almost exclusively As(V). It is also important that this water was ingested directly from natural water sources without any treatment. The ingested arsenic was extensively methylated. In urine 93% of the arsenic was found as methylated arsenic species, such as monomethylarsonic acid [MMA(V)] and dimethylarsinic acid [DMA(V)]. The original ingested inorganic species [As(V)], represent less than 1% of the total urinary arsenic. Methylation activity among individuals can be assessed by measuring primary [inorganic As/methylated As] and secondary methylation [MMA/DMA] indexes. Both methylation indexes were 0.06, indicating a high biological converting capability of As(V) into MMA and then MMA into DMA, compared with the control population and other arsenic exposed populations previously reported.

Determination of arsenic in glycerine by flow injection, hydride generation and inductively-coupled plasma/atomic emission spectrometry

Analytica Chimica Acta, 1986

ABSTRACT

Spectroscopic analysis of organometallic compound

Design concepts for strip-line microwene spectrochemical sources

Analytical Chemistry, 1990

Comparison of microwave-assisted extraction and waste extraction test (WET) preparation for inductively coupled plasma spectroscopic analyses of waste samples

Analytical and Bioanalytical Chemistry, Aug 21, 2002

Download

Dynamics of heat, mass and momentum transfer in an inductively coupled plasma

Final Report, Mar 1, 1984

$Research paper thumbnail of Chapter 4 Field-flow fractionation-inductively coupled plasma-mass spectrometry$

Chapter 4 Field-flow fractionation-inductively coupled plasma-mass spectrometry

Advances in atomic spectroscopy, 2002

$Research paper thumbnail of Flow field-flow fractionation-inductively coupled plasma mass spectrometry for sediment bound trace metal characterization$

Flow field-flow fractionation-inductively coupled plasma mass spectrometry for sediment bound trace metal characterization

Journal of Analytical Atomic Spectrometry, 2002

ABSTRACT

Flow and temperature fields in a free discharge inductively coupled plasma

... The recirculation eddy gives rise to a back flow of 4.7 m/s. The inward electromagnetically i... more

Emission spectrometry

Analytical Chemistry, Apr 1, 1972

Sample analysis by on-line isotope dilution inductively coupled plasma mass spectrometry

Journal of Analytical Atomic Spectrometry, 1989

... 4 761 Sample Analysis by On-line Isotope Dilution Inductively Coupled Plasma Mass Spectrometr... more

Computer Simultation of Decomposition of Al2O3 in an Oxygen Plasma

Zeitschrift für Physikalische Chemie, 1988

Preliminary adult soil ingestion estimates: Results of a pilot study

Regulatory Toxicology and Pharmacology, Aug 1, 1990

Download

Application of liquid-layer solid-sample spark technique to spectrochemical spark source

Download

$Research paper thumbnail of Flow field-flow fractionation-inductively coupled plasma mass spectrometry and metal speciation in proteins: A feasibility study$

Flow field-flow fractionation-inductively coupled plasma mass spectrometry and metal speciation in proteins: A feasibility study

Journal of Analytical Atomic Spectrometry, 1999

ABSTRACT

Determination of major, minor and trace elements in bone by inductively-coupled plasma emission spectrometry

Analytica Chimica Acta, 1983

Mutual spectral interferences on selected analytical lines ofrare earth elements in inductively coupled argon plasma atomicemission spectrometry

Mutual spectral interferences on selected analytical lines of rare earth elements in inductively ... more

Dissolution of Al-Fe materials and analysis by inductively coupled plasma - atomic emission spectrometry

Fresenius Journal of Analytical Chemistry, Nov 6, 1998

Download

Epidemiological Study to Estimate How Much Soil Children Eat

2020 Winter Conference on Plasma Spectrochemistry, January 13–18, 2020, Tucson, Arizona

Journal of Analytical Atomic Spectrometry, 2020

Guest Editor Ramon M. Barnes introduces this year’s themed collection on the Winter Conference on... more

Urinary arsenic speciation profile in ethnic group of the Atacama desert (Chile) exposed to variable arsenic levels in drinking water

Journal of Environmental Science and Health, Part A, 2014

Determination of arsenic in glycerine by flow injection, hydride generation and inductively-coupled plasma/atomic emission spectrometry

Analytica Chimica Acta, 1986

ABSTRACT

Spectroscopic analysis of organometallic compound

Design concepts for strip-line microwene spectrochemical sources

Analytical Chemistry, 1990

Ramon Barnes

Related Authors

Uploads

Papers by Ramon Barnes

Log In