interlaboratory study Articles
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Round Two—Confined Compression: Young's Modulus, Poisson's Ratio, and Ultimate Strength
The Institute for Standards Research interlaboratory study of rock properties has provided precision statements for two additional ASTM rock-property test methods, D 5407 (Young´s modulus and Poisson´s ratio) and D 2664 (ultimate strength), both in confined compression. Three types of intact rock, Barre Granite, Berea Sandstone, and Tennessee Marble, were used in this study. Data were collected ...
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Round One—Longitudinal and Transverse Pulse Velocities, Unconfined Compressive Strength, Uniaxial Elastic Modulus, and Splitting Tensile Strength
An interlaboratory study has been conducted using four ASTM rock-property test methods (longitudinal and transverse pulse velocity, indirect tensile strength, unconfined compressive strength, and uniaxial elastic modulus) on four types of intact rock (Barre Granite, Berea Sandstone, Salem Limestone, and Tennessee Marble). There were five replications per test per rock type. The rock testing was ...
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Daphnia magna wastewater toxicity assays: an interlaboratory study
In order to protect aquatic life, many acute and short-term chronic whole effluent toxicity (WET) tests have been employed for assessment of the toxicity of wastewater. Toxicity tests using biological responses to measure effects provide valuable information about the significance of chemical contamination. The response of an organism to contaminated effluents provides an integrated measure of ...
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Results of a European interlaboratory method validation study for the quantitative determination of lipophilic marine biotoxins in raw and cooked shellfish based on high-performance liquid chromatography–tandem mass spectrometry Part I:collaborative study
Abstract A European interlaboratory collaborative study was conducted to validate a method for the quantitative determination of lipophilic marine biotoxins based on high-performance liquid chromatography–tandem mass spectrometry. During this study, the diarrhetic shellfish poisoning toxins okadaic acid, dinophysis toxin1 and 2 including their esters, the azaspiracids 1-3, pectenotoxin2, ...
By QuoData GmbH
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Validation of Arxula Yeast Estrogen Screen assay for detection of estrogenic activity in water samples: Results of an international interlaboratory study
Abstract Endocrine-active substances can adversely impact the aquatic ecosystems. A special emphasis is laid, among others, on the effects of estrogens and estrogen mimicking compounds. Effect-based screening methods like in vitro bioassays are suitable tools to detect and quantify endocrine activities of known and unknown mixtures. This study describes the validation of the Arxula-Yeast Estrogen ...
By QuoData GmbH
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How You Count Really Counts (Part I)
If you are attempting to ship your Bacillus powder products internationally to certain countries, your product may be sent for a third party plate count prior to approval. It is very important that you understand which plating method will be used to enumerate the product. If you don’t understand the method and the weaknesses of each method as it relates to Bacillus spores, you may have a ...
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An interlaboratory comparison study for the determination of dialkyl phthalate esters in environmental and biological samples
A series of interlaboratory comparison exercises were conducted to assess the accuracy of dialkyl phthalate ester (DPE) concentration measurements in environmental and biological samples. Five laboratories participated in analyses to determine DPE concentrations in standard test solutions; marine sediments; three certified reference materials (CRMs), including CARP‐2 (fish muscle) and BCR‐07 ...
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Interview with Mary C. McKiel - 2013 Chairman of the ASTM International Board of Directors
As standards executive for the U.S. Environmental Protection Agency, Mary C. McKiel, Ph.D., brings expertise both in government service and in standards development to her term as 2013 chairman of the ASTM International board. Here she talks about federal use of consensus standards, incorporation by reference and other challenges and opportunities at the intersection of government and standards ...
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