laboratory testing standard Articles
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Towards a generic rainfall-runoff model for green roofs
A simple conceptual model for green roof hydrological processes is shown to reproduce monitored data, both during a storm event, and over a longer continuous simulation period. The model comprises a substrate moisture storage component and a transient storage component. Storage within the substrate represents the roof's overall stormwater retention capacity (or initial losses). Following a storm ...
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Quantifying soil surface photolysis under conditions simulating water movement in the field: A new laboratory test design
Soil surface photolysis can be a significant dissipation pathway for agrochemicals under field conditions, although it is assumed that such degradation ceases once the agrochemical is transported away from the surface following rainfall/irrigation and subsequent drainage of soil pore water. However, as both downward and upward water movement occurs under field conditions, relatively mobile ...
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The World’s Largest Gas to Liquids Facility Runs on Thermo Scientific SampleManager LIMS
Established by Shell and Qatar Petroleum in 2006, Pearl GTL is the largest gas to liquids facility on the planet. Gas to liquids (GTL) is the conversion of natural gas to liquid fuels and other products, including gasoil, naphtha, kerosene, normal-paraffin and lubricants. Pearl GTL has a capacity of 140,000 barrels per day of these products and 120,000 barrels per day of liquefied petroleum gas, ...
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Developing a Culture of Quality Through EQA
From specimen collection to delivery of test results, laboratory testing must conform to the highest standards of quality: lives depend on it. Click the image below to read more from APHL. ...
By Qualtrax Inc
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Proposed Standard Test Method for Measurement of Pneumatic Permeability of Partially Saturated Porous Materials by Flowing Air
This proposed standard describes a laboratory test method for the measurement of the coefficient of permeability for airflow (pneumatic permeability) through porous media (e.g., soils) partially saturated with water. Control and measurement of the airflow is effected at the inlet of the specimen. The permeameter cell is fitted with dual transfer lines that isolate the specimen pressure drop from ...
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Full‐life chronic toxicity of sodium salts to the mayfly Neocloeon triangulifer in tests with laboratory cultured food
While insects occur in nearly all freshwater ecosystems, few sensitive insect models exist for use in determining the toxicity of contaminants. The objectives of the present study were to adapt previously developed culturing and toxicity testing methods for the mayfly Neocloeon triangulifer (Ephemeroptera: Baetidae), and to further develop a method for chronic toxicity tests spanning organism ...
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Testing for Equivalence - Why the TOST Procedure Works
Q: What statistical procedures are used to demonstrate that two sets of test results are equivalent? A: Changes are often made in laboratory operations for expansion or improvement, and these may involve new apparatus, personnel, test methods or testing sites, for example. These changes must be supported by statistical methods to ascertain whether the test results from the old and new sources ...
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Case study - How to properly maintain and service your oxidizer
Your air pollution control system represents a significant investment in not only initial capital but also ongoing maintenance and operation. Routine inspections performed by your staff combined with thorough maintenance plans provided by Anguil Environmental Service Technicians will ensure you get the most from your investment over the entire life of the system. Anguil has almost three decades ...
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Introduction to Quality Assurance of Continuous Emissions Monitoring
Large industrial plants are required to have and maintain an efficient process of Continuous Emissions Monitoring. In order to indicate that their processes are effective, and their emission monitoring systems meet the required criteria, there are carefully drafted EN Standards for assuring the high quality of permanently installed automated monitoring systems (AMS). In this article we will ...
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