Analysis of rainwater samples helps researchers monitor gas emissions from volcano on Monserrat, as part of continuous risk assessment programme
Researchers at the volcano observatory on the Caribbean island of Monserrat are using the Palintest Photometer 5000 for the analysis of rainwater samples taken from near to the currently erupting volcano.
This helps them monitor the gas emissions from the volcano, providing an important input to the assessment of volcanic risk.
Several analytical methods are used to monitor the activity of the volcano, including gas monitoring.
The Photometer 5000 is an advanced solid-state digital-readout colorimeter offering a precise means of water analysis.
Using the photometer, researchers analyse sulphates, chlorides and fluorides in the rainwater.
Through its use they have recognised changes in the eruption rate of the volcano from changes in the chloride/sulphate mass ratio of the rainwater.
The Photometer 5000 is integrated with the Palintest system of analysis and can perform an extensive range of water tests.
After a reagent is added to a sample the photometer accurately assesses the colour in the test sample and displays a digital readout.
Used in conjunction with a calibration chart, it is universally applicable to a wide range of tests without the need for manual recalibration or for plug-in calibration modules.
Monserrat is part of a volcanic island arc formed where the Atlantic tectonic plate passes beneath the Caribbean plate.
The island is built almost exclusively of volcanic rocks, and one of the volcanoes has continued, since 1995, to erupt.
The Monserrat Volcano Observatory was established in 1995, soon after the current eruption began.
Its role is to advise the authorities on the volcanic activity and its associated hazards and risks.
