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Stream Sampling Articles & Analysis
84 articles found
While conventional electrochemical or Zirconia sensors with extractive sampling methods frequently struggle with delayed response times (typically >30 seconds), calibration drift, and susceptibility to environmental interference, posing risks in time-sensitive safety scenarios. ...
Traditional gas analysis methods often require sample extraction and complex conditioning processes, which can introduce delays, errors, and potential maintenance issues. ...
Then short-term, long-interval sampling may be applied. Here, “sampling” means that a stream of flue gas is led through a filter or a sorbent material inside a container, leading to accumulation of pollutants of interest. After a prescribed sampling period, perhaps as short an hour or so, the container is removed from ...
ByOPSIS AB
ABOUT UVT UV transmittance, UV transmission or UVT is a measurement of the amount of ultraviolet light (commonly at 254 nm due to its germicidal effect) that passes through a water sample compared to the amount of light that passes through a pure water sample. To measure UVT, ultraviolet light at 254 nm is passed through a 10 mm quartz cell containing the ...
In-line instruments are usually installed in the field and continuously analyze the sample stream overflowing from the process sampling unit. The purpose of this turbidimetric tool is to store samples or standards in vials/sample bottles. The tool is set up before use, where the numbers listed must be 0 or in ...
Semiconductors are the fundamental components of modern electronic goods. Cleanliness is crucial inside of a semiconductor fabrication facility, considering the scale of the working surfaces (nanometers). Contaminants of all types can result in defects, leading manufacturers to implement extremely strict and precise production control procedures with high reproducibility, especially during one ...
The catalytic activity was evaluated in a vertical tubular reactor, with downward flow. Prior to analysis, the sample was reduced in a stream composed of 10% H2/Ar at 400 °C for 60 min. ...
The equivalent Gascard NG sensors for these gases are designed for use in air-like atmospheres and have reduced source lifetimes when exposed to high levels of hydrogen in the sample stream. The Chillcard NG is set up for single use gas measurement at a time.Key Features:On-Board Barometric Pressure Correction in the Range 800mbar – 1150mbar. ...
The article focuses on 2 scenarios of commercial air travel; the effect of passenger density on the transport of contaminants throughout the aircraft cabin, and the transmission of contaminants throughout the aircraft cabin when the supply is eliminated.In the first scenario a mixture of carbon dioxide (CO2) and helium (He) is injected as a tracer gas at a seat location in the cabin, and the gas ...
It is also useful when the gas is only present in the sample stream for a short period of time and a measurement of the amount of gas is required rather than a concentration measurement. Many sampling processes benefit from this type of analysis because it is possible to measure the amount of gas in a ‘pulse’ added to a constant ...
Continuous emissions monitoring is a legal requirement in the US and many other countries to measure the emissions from smokestacks of industrial plants. Site owners are responsible for having functioning CEM systems in place and keeping them in good working order to monitor emission levels accurately. This article will outline how CEMS work, their main components and why they are ...
In the first part of this series, a brief historical overview was given for both infrared (IR) and near-infrared (NIR) spectroscopy, as well as for Fourier transformation (FT) and dispersive spectroscopy. A few myths were discussed and put to rest, and we showed that Fourier transformation spectroscopy (FT-NIR) is not necessarily the only nor the best way to integrate reproducible spectroscopic ...
ByB&W Tek
CEMS typically consist of analyzers to measure gas concentrations within the stream, equipment to direct a sample of that gas stream to the analyzers if they are remote, equipment to condition the sample gas by removing water and other components that could interfere with the reading, pneumatic plumbing with valves that can be ...
With the ongoing growth of process analytical technologies and of connected devices, more efforts have had to be put into developing reliable, safe, and efficient interfaces. Based on the 2060 online analysis platform, Metrohm Process Analytics has designed the perfect interface for any industrial process plant: the 2060 Human Interface (HI). Following the concept of ultimate flexibility of this ...
Carbon capture technology provider Svante is using Gasmet FTIR gas measurement technology at the Lafarge cement manufacturing site in Richmond, BC Canada to optimize process efficiency & quality control. Svante is a leading provider of commercially viable, economically scalable, second generation carbon capture technology which quickly captures (CO₂) carbon dioxide from flue gas, ...
Local Shaun Lee said he’s seen plastic pellets on the banks of the stream several times since 2017. Each time he’s called Auckland Council. ...
They’re also performed directly after analyzer installations, and provide the following output values: Signature gain Reactant peak drift time window (RL, RH) Target peak drift time window (TL, TH) Zero-offset (zero factor) when measuring a sample with no AMC present Drift times will be higher at sea level than at higher altitudes. ...
Naturjal gas sampling challenges In order to comply with state and federal regulations, oil and gas companies need to take an adequate gas sample that is representative of the gas flow. This requirement to take a 'representative sample' is challenging for engineers. They must first carefully consider where to take this 'representative' gas ...
The QIC Series gas analysers also feature a mass range of 200 amu for detecting ammonia (NH3), hydrogen, and methane in gas streams. The QIC series gas analysis systems include special sampling options developed for analysis of gas/vapour sample streams typical in fuel cell R&D, including high concentrations of light gases, ...
Data is sparse on how pesticides migrate into Hawaii’s waterways from commercial farms and ranches, but a new study of water from 31 streams, ditches, canals and a wetland on Oahu and Kauai found at least one pesticide present — at very low levels — in all but one of the samples. ...