The university is 30 years old.Discover its past and present.Help build its future.
14 February 2017
Find out about bachelor's degrees, postgraduate courses and all the educational courses offered by the UdG.
Teaching is concentrated in the faculties and schools, and the departments deal with research, which is also conducted by institutes and chairs, at the same time responsible for knowledge promotion.
The analysis of total organic carbon (TOC) allows for the determination of different types of carbon present in a sample.This is based on a catalytic oxidation of the sample at 680ºC and the subsequent analysis of the CO2 generated through an infrared detector.
In order to carry out an analysis, get in touch with the head of the UEA.
The toxicity and storage precautions of the samples must be reported.Once the report has been made, if nobody comes to collect the sample after a week, it will be destroyed.
The different types of carbon contained in a sample can be determined:
Total Carbon: In the combustion of the sample, two products are obtained: water (which is vaporised and eliminated through condensation) and organic and inorganic carbon (that oxidise in CO2).The CO2 generated is measured through a non-dispersive infrared detector (NDIR).
Inorganic Carbon: The inorganic carbon of a sample is determined through the acidification of the sample with phosphoric acid.In this process, CO2 is formed and analysed using the NDIR detector.
Total Organic Carbon: This is calculated by the difference between the total carbon and the inorganic carbon.
Non-Purgeable Organic Carbon (NPOC): In samples where the inorganic carbon content is much higher than the organic content, the recommendation is to measure the NPOC.This is obtained from the previous acidification of the sample in order to eliminate all the IC, and later shaking it to eliminate all the purgeable organic carbon.Then the acidified and shaken sample is placed inside a combustion tube where it is oxidised to generate CO2.
TOC is a fast, accurate and direct measure of the total organic contents of a sample of water, since it does not depend on the state of initial oxidation of the material.Some of the applications for this technique are:
The sample volume required for analysis is 24 mL (filtered at 0.45 µm).
PARTICIPATION IN INTERCOMPARISON TEST
Participation in this rehearsal is a way of measuring the quality of the results through an external evaluation.
Around 15 laboratories on an international scale usually participate.This consists of the analysis of two samples of continental waters, giving results of the contents of TOC.
The STR have taken part in it since 2022 bringing the value of the TOC, always obtaining satisfactory results.
Choose which types of cookies you accept which the University of Girona can store in your browser.
Those that are essential for enabling your connection.There is no option for disabling them, as they are necessary for the functioning of the website.
These enable your options to be remembered (for example language or region you are accessing from), to provide you with advanced services.
They provide statistical information and enable improved services.We use Google Analytics cookies which you can deactivate by installing this plugin.
To offer advertising contents relating to the interests of users, either directly, or through third parties (“adservers”). These must be activated if you wish to see the YouTube videos uploaded to the University of Girona’s website.
The University of Girona website uses its own and third-party cookies for technical and analytical purposes.To manage them use the manager.If you would like further information, please access our Cookies Policy.