Able helps mercury detection
An
Able Instruments and Controls product story
Edited by the Engineeringtalk editorial team
Dec 6, 2005
Innovene Grangemouth has called on Able Instruments and Controls to help detect mercury contamination in crude oil streams, using its Jerome 431-XE mercury analyser.
Innovene Grangemouth has called on Able Instruments and Controls to help detect mercury contamination in crude oil streams, using its Jerome 431-XE mercury analyser.
The mercury vapour analyser uses a gold film sensor for accurate detection and measurement.
This portable hand-held unit can be carried to locations where mercury may be present, for applications such as industrial hygiene monitoring, mercury spill clean up and mercury exclusion testing.
Push-button operation lets users measure mercury levels from 0.003 to 0.999mg/m3 in seconds.
The gold film sensor is inherently stable and selective to mercury, eliminating interferences common to ultraviolet analysers, such as water vapour and hydrocarbons.
When the sample cycle is activated, the internal pump draws a precise volume of air over the sensor.
Mercury in the sample is absorbed and integrated by the sensor, registering it as proportional change in electrical resistance.
The instrument computes the concentration of mercury in milligrams per cubic meter or nanograms, and displays the final result in the LCD readout.
An improved film regeneration circuit in the 431-XE makes for increased sensor longevity.
A Jerome analyser is used around the Grangemouth site, within many of the different plants, measuring the mercury vapour levels in oil pipelines and storage vessels.
Levels of mercury in crude oil vary depending on the source of the oil.
The Grangemouth site sources its crude oil feedstocks from around the world and these may contain differing levels of mercury.
The main importance of mercury measurement is to protect employees' health.
An occupational hygiene specialist at the site said that "the Jerome is used because the analysis is almost instant".
"With other methods, the samples have to be sent to laboratories for analysis, which simply takes too long".
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