Comparison of Microwave-Assisted Digestion and Consensus Open-Vessel Digestion Procedures for Evaluation of Metalliferous Airborne Particulate Matter.

08:00 EDT 11th October 2019 | BioPortfolio

Summary of "Comparison of Microwave-Assisted Digestion and Consensus Open-Vessel Digestion Procedures for Evaluation of Metalliferous Airborne Particulate Matter."

Metal occupational exposure limits mainly focus on total content of the respective metals of interest. The methods applied for trace metal analysis in occupational health and safety laboratories are usually standardized to pragmatic consensus digestion schemes, ensuring comparability of results. The objective of the present study entailed the evaluation of a recently developed HNO3-only microwave-assisted digestion procedure by comparison with the German consensus hot-block digestion and other national digestion schemes. An inter-laboratory comparison test with participation of nine national occupational health and safety laboratories from Europe and North America was organized. For adequate emulation of what workers are at risk of inhaling four different industrial metal processing workplace dusts (electronic recycling, high-speed steel grinding, cylinder head cleaning, and battery combustion ash) were homogenized and sieved to the particle size < 100 µm diameter at IFA. The participants were asked to process air sample-typical amounts according to the German hot-plate technique, the IFA microwave-assisted digestion scheme as well as their national or in-house conventional digestion method for airborne dust and analyze for Cd, Co, Cr, Co, Fe, Mg, Ni, Pb, and Zn. Recoveries (relative to consensus open-vessel digestion) obtained for the new IFA microwave-assisted digestion were between 88 and 114% and relative reproducibility standard deviations were <10% for most metals of interest. The in-house digestion procedures applied varied widely but (whether microwave, hot block, or open vessel) yielded comparable results for the predominantly elemental alloy type dusts supplied. Results become more diverse for the combustion dust, especially if a combination of microwave-assisted digestion procedures with high temperatures and hydrofluoric acid is applied. ISO 15202-2 is currently being revised; this digestion procedure will be included as a possible variant in annex 2.


Journal Details

This article was published in the following journal.

Name: Annals of work exposures and health
ISSN: 2398-7316
Pages: 950-964


DeepDyve research library

PubMed Articles [10751 Associated PubMed Articles listed on BioPortfolio]

Microwave and open vessel digestion methods for biochar.

Digestion of biomass derived carbonaceous materials such as biochar (BC) can be challenging due to their high chemical recalcitrance and vast variations in composition. Reports on the development of s...

Microwave-assisted acid hydrolysis for whole bone proteomics and paleoproteomics.

Whole bone proteomic analyses rely on lengthy sample preparation including demineralization and digestion to break bone down into peptides to recover using mass spectrometry. However, microwave-assist...

A smart-phone-based electrochemical platform with programmable solid-state-microwave flow digestion for determination of heavy metals in liquid food.

This work introduces an inexpensive and user-friendly electrochemical platform for heavy metal determination in liquid food. Smart-phone connectivity, solid-state-microwave flow digestion and nano-Au-...

Method validation and determination of heavy metals in cocoa beans and cocoa products by microwave assisted digestion technique with inductively coupled plasma mass spectrometry.

In this article, an easy and quick method based on microwave assisted acid digestion technique prior to quantification using inductively coupled plasma mass spectrometry for the analysis of heavy meta...

Lipid emulsion enhances fish allergen parvalbumin's resistance to in vitro digestion and IgG/IgE binding capacity.

This study was performed to determine Parvalbumin (PV), a well-known fish allergenic protein, digestion kinetics and immunoreactivity of digestion products with Immunoglobulin G/Immunoglobulin E recog...

Clinical Trials [7673 Associated Clinical Trials listed on BioPortfolio]

Starches Digestion After Obesity Surgery.

Despite an impressive capacity to induce diabetes remissions, the gastric bypass surgery has been associated with the onset of hyperglycemic peaks, which are very intensive and transient, ...

The Effect of Alginate on Carbohydrate and Fat Digestion in a Mixed Meal - A Pilot Trial

This study will investigate the effect of an extract of brown seaweed, called alginate, on fat digestion. The extract has been cooked into sausages and the alginate sausages will be compar...

Association Between Lactase Deficiency, and the Small Intestinal Microbiome in Adults.

The purpose of this study is to study the role of the enzyme (substance produced by the body that helps in a biochemical reaction like digestion in the body) responsible for digestion of l...

Lycopene and Beta-carotene Metabolism in the Digestive Tract of Healthy Men

Consumption of foods containing carotenoids, as well as vitamin E, have been associated with lower risk of developing a number of chronic diseases. While the parent compounds have largely ...

Gastric Emptying of Rice With Different Starch Properties

Glycemic carbohydrates are associated with metabolic disturbances, such as type II diabetes, due to rapid digestion of starch into glucose. The specific properties of starch within these f...

Medical and Biotech [MESH] Definitions

Techniques for measuring specific nucleic acid interaction with another nucleic acid or with a protein by digestion of the non-interacting nucleic acid by various nucleases. After all non-interacting regions are eliminated by nuclease digestion, the protected nucleic acid that remains is analyzed. DNA FOOTPRINTING utilizes this technique to analyze the DNA contact sites of DNA-BINDING PROTEINS.

Impaired digestion, especially after eating.

The process of breakdown of food for metabolism and use by the body.

Any spaces or cavities within a cell. They may function in digestion, storage, secretion, or excretion.

The discharge of saliva from the SALIVARY GLANDS that keeps the mouth tissues moist and aids in digestion.

Quick Search

DeepDyve research library

Searches Linking to this Article