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Records with

  • Keyword = 'Standardized Analytical Methods' OR 'Selected Analytical Methods' OR SAM OR 'analytical methods'.
Records 26 to 50 of 1612

2023
AMOS: the EPA database of analytical methods and open mass spectral database supporting non-targeted analysis
(PRESENTATION) [Presented : Aug 17, 2023]
The field of non-targeted analysis (NTA) is rapidly advancing due to technology developments supporting high-resolution mass spectrometry. The EPA has been developing software tools to support NTA and a core aspect of this work has been the delivery of supporting cheminformatics ...
AQMEII4 Activity 2 - A single-point modeling approach for the intercomparison and evaluation of ozone dry deposition across regional air quality models
(PRESENTATION) [Presented : May 26, 2023]
A primary sink of many air pollutants and their precursors is dry deposition. Dry deposition estimates differ substantially across chemical transport models yet an understanding of the drivers of the inter-model spread is incomplete. Here we introduce Activity 2 of the Air Qualit...
AQMEII4 Activity 2: A single-point modeling approach for the intercomparison and evaluation of ozone dry deposition across regional air quality models
(PRESENTATION) [Presented : Jan 12, 2023]
A primary sink of many air pollutants and their precursors is dry deposition. Dry deposition estimates differ substantially across chemical transport models yet an understanding of the drivers of the inter-model spread is incomplete. Here we introduce Activity 2 of the Air Qualit...
ASTM Standard Test Method for Determination of Fluorotelomer Alcohols in Air by Thermal Desorption - Gas Chromatography Triple Quadrupole Tandem Mass Spectrometry
(PUBLISHED REPORT) [Published : Oct 31, 2023]
It is imperative to develop sampling and analytical methods to characterize FTOHs in indoor air for the development of mass transfer models to quantitatively predict FTOH emissions and transport for exposure assessment and risk management. This standard describes thermal desorpti...
Accessing Open Mass Spectrometry Data and Analytical Methods Using Cheminformatics Approaches
(PRESENTATION) [Presented : Feb 22, 2023]
Analytical methods can vary in nature from detailed regulatory methods to more summary in nature. Regulatory method documents can include details of analytes which can be studied, supported matrices, reagents, methodological details, statistical performance, interlaboratory valid...
Analytical Methods and Monitoring for Regulatory and Utility Purposes
(PRESENTATION) [Presented : Nov 30, 2023]
The purpose of this lecture is to provide current state of the science with regards to waterborne protozoa. It describes the biology and human health significance of Toxoplasma gondii.
Analytical Methods for Microplastic Detection in Drinking Water
(PRESENTATION) [Presented : Sep 14, 2023]
Microplastic contamination raises concerns in drinking water quality due to difficulties in removing them during treatment and potential for contaminant leaching. EPA’s Office of Research and Development is interested in developing sampling and analytical methods for microp...
Analytical Methods for Quantifying Per- and Polyfluorinated Alkyl Substances in Source Samples: An Overview of Other Test Methods 45 and 50
(PRESENTATION) [Presented : Sep 14, 2023]
Per- and polyfluorinated alkyl substances (PFAS) compose a group of thousands of synthetic chemicals with advantageous physical and chemical properties for consumer and industrial applications. PFAS have stain-resistant, water-resistant, non-stick, and lubricating properties and ...
Analytical method interferences for perfluoropentanoic acid (PFPeA) and perfluorobutanoic acid (PFBA) in biological and environmental samples
(JOURNAL) [Published : Feb 01, 2023]
While high-resolution MS (HRMS) can be used for identification and quantification of novel per- and polyfluorinated alkyl substances (PFAS), low-resolution MS/MS is the more commonly used and affordable approach for routine PFAS monitoring. Of note, perfluoropentanoic acid (PFPeA...
Analytical methods for PFAS in environmental media
(PRESENTATION) [Presented : Jan 08, 2023]
Presentation 01/08/2023 -International Conference on the Remediation and Management of Contaminated Sediments.  Topic: Analytical methods for PFAS in environmental media. Types of analytical and standard methods. Drinking Water Sample Methods Method 537 Method 533 Non-Drink...
Annotating and Visualizing a Database of Analytical Methods
(PRESENTATION) [Presented : Oct 28, 2023]
Analytical methods can vary in nature from detailed regulatory methods to more summary in nature. Regulatory method documents can include details of analytes which can be studied, supported matrices, reagents, methodological details, statistical performance, interlaboratory valid...
Applying Cheminformatics to Develop a Structure Searchable Database of Analytical Methods (HESI 2023)
(PRESENTATION) [Presented : Nov 30, 2023]
Analytical methods can vary in nature from detailed regulatory methods to more summary in nature. Regulatory method documents can include details of analytes which can be studied, supported matrices, reagents, methodological details, statistical performance, interlaboratory ...
Assessment Indices of Littoral Habitat Condition for Lakes in Maine and New England, United States
(JOURNAL) [Published : Jul 10, 2023]
Littoral habitat is critical for lake biota, but it is adversely affected by residential shoreland development through the loss and reduced structural complexity of lakeshore vegetation. There currently exists no assessment methodology for evaluating littoral habitat condition of...
Chemistry data delivery from the US-EPA to support environmental chemistry (SETAC 2023)
(PRESENTATION) [Presented : Nov 16, 2023]
In recent years, the growth of scientific data and the increasing need for data sharing and collaboration in the field of environmental chemistry has led to the creation of various software and databases that facilitate research and development into the safety and toxicity of che...
Computational estimates of daily aggregate exposure to PFOA/PFOS from 2011 to 2017 using a basic intake model
(JOURNAL) [Published : Jan 01, 2023]
Background: Human exposure to per- and polyfluoroalkyl substances has been modeled to estimate serum concentrations. Given that the production and use of these compounds have decreased in recent years, especially PFOA and PFOS, and that additional concentration data have bec...
Current Status of Method Development for Determination of Fluorotelomer Alcohols in Air by Thermal Desorption Gas Chromatography/Tandem Mass Spectrometry
(PRESENTATION) [Presented : Nov 02, 2023]
Elevated levels of per- and polyfluoroalkyl substances (PFAS) widely detected in consumer products, building materials, indoor air, and house dust underscore the relevance of the indoor environment to human exposure. Another source of PFAS in the indoor environment is through vap...
Demonstrating the Use of Non-targeted Analysis for Identification of Unknown Chemicals in Rapid Response Scenarios
(JOURNAL) [Published : Feb 28, 2023]
Several thousand intentional and unintentional chemical releases occur annually in the U.S., with the contents of almost 30% being of unknown composition. When targeted methods are unable to identify the chemicals present, alternative approaches, including non-targeted analysis (...
Design, analytical methods and data analysis of microplastic contamination
(PRESENTATION) [Presented : Nov 10, 2023]
This presentation is a brief overview of US Federal and State activities for microplastics. It includes a summary of plastics legislation in the US and highlights federal and state governmental response to legislative mandates. It focuses on the activities of the US Interagency N...
Determination of Ethylene Oxide at Ultra-Trace Concentrations in Ambient Air Using EPA Method TO-15A: Optimization of VOC Preconcentrator and GC/MS Analytical Method Parameters
(PRESENTATION) [Presented : Nov 16, 2023]
The United States Environmental Protection Agency (EPA) Office of Research and Development (ORD) is optimizing preconcentration-based gas chromatography/mass spectrometry (GC/MS) analytical methods for determination of ultra-trace concentrations of ethylene oxide (EtO) in ambient...
Development and Validation of Analytical Methods to Quantitate PFAS Compounds in Gavage Dose Formulations for Rodent Toxicology Studies
(PRESENTATION) [Presented : Oct 28, 2023]
Per- and polyfluoroalkyl substances (PFAS) are used in industrial processes and found in commercial products. Through their manufacture, use, and disposal, these compounds have become anthropogenic contaminants in air, soil, and water. These chemicals tend to be bioaccumulative a...
Development and validation of analytical methods for measuring diverse cyanotoxins in complex matrices using automated solid phase extraction, isotope dilution LC-MS/MS
(PRESENTATION) [Presented : Nov 16, 2023]
The analysis of cyanotoxins in various matrices is complicated by challenges in extraction, concentration, and quantification. Common cyanotoxins in the United States include microcystins, anatoxins, and cylindrospermopsins, which across the various congeners have considerable di...
Dry deposition of ozone: Intercomparison and evaluation across chemical transport models in the Air Quality Model Evaluation International Initiative (AQMEII)
(PRESENTATION) [Presented : Apr 21, 2023]
This talk will provide an update on the status of research performed under Phase 4 of the Air Quality Model Evaluation International Initiative (AQMEII) by more than 10 research groups from North America and Europe. The focus of this initiative is on analyzing deposition of trace...
End-of-Life Management of Photovoltaic Solar Panels in the United States
(PUBLISHED REPORT) [Published : Oct 26, 2023]
Solar energy is regarded as clean technology, but what happens to solar panels once they reach the end of their lifetime is vital for sustainability and achieving a circular economy. Current solar panels have an average lifespan of about 25 years. Millions of solar panels install...
Evaluation of two methods for detection of viable Bacillus anthracis simulant spores in maritime environmental samples
(JOURNAL) [Published : Jan 03, 2023]
Analytical methods exist to detect biothreat agents in environmental samples during a response to biological contamination incidents. However, the coastal zone facilities and assets of the United States Coast Guard (USCG), including response boats in diverse geographical areas an...
Guidelines for Cumulative Risk Assessment: Planning and Problem Formulation (Public Comment Draft)
[Published : Jun 22, 2023]
EPA’s draft document describes the planning and problem formulation steps of cumulative risk assessments (CRAs) and offers guidelines for when such assessments might be appropriate. The document provides recommendations to aid in developing a CRA analysis plan, but they do not pr...