Analytical Instrumentation

  • Voltammetric Trace Determination of Uranium(VI)in Drinking and Mineral Water According to DIN 38406-17

Voltammetric Trace Determination of Uranium(VI)in Drinking and Mineral Water According to DIN 38406-17

Mar 12 2008 Read 1126 Times

Many rock formations contain small amounts of uranium minerals.
Weathering processes release uranium into the soil, water and atmosphere. Because of its subchronic toxicity, the introduction of a limit for the uranium content of drinking and mineral water has been demanded for some time. In the European Union the corresponding limits have not yet been fixed by law. Internationally, the stipulated limiting
values range from10 to 30 ìg/L uranium.
The accurate quantification of trace amounts of uranium generally requires complicated and expensive analytical equipment such as instruments based on inductively coupled plasma mass spectrometry (ICP-MS). In contrast, with the Metrohm 797 VA Computrace, dissolved uranium in the form of U(VI) can be determined easily and at reasonable expenditure! The voltammetric determination of uranium with the 797 VA Computrace is just as accurate and efficient as current ICP-MS methods.
The AdCSV method (Adsorptive Cathodic Stripping Voltammetry) for the
voltammetric determination of the uraniumcontent is based on complexing
U(VI) with chloranilic acid (2,5-dichloro-3,6-dihydroxy-1,4-benzoquinone). The uranium content can be determined down to the ng/L range. DIN Standard 38406-17 is currently being drawn up based on this AdCSV method. This means that in future the voltammetric determination of uranium can be used as a generally recognised method for monitoring drinking and mineral water in daily practice.
The 705 UV Digester made by Metrohm is used for the UV photolysis of
water samples with a low to medium organic load. The UV Digester consists of a control unit with built-in timer and a separate wet-chemistry part with UV lamp, cooling device and a holder for 12
sample digestion tubes, each for max. 12 mL sample.

Reader comments

Do you like or dislike what you have read? Why not post a comment to tell others / the manufacturer and our Editor what you think. To leave comments please complete the form below. Providing the content is approved, your comment will be on screen in less than 24 hours. Leaving comments on product information and articles can assist with future editorial and article content. Post questions, thoughts or simply whether you like the content.

Post a Comment





Digital Edition

Petro Industry News March 2020

March 2020

In This Edition Fuel For Thought - Krohne appoints new advisory board chairman and new executive board - Dinamica Generale US to acquire Zeltex Inc. - Halma expands gas detection capabiliti...

View all digital editions

Events

POGEE - NEW DATES

Jul 09 2020 Lahore, Pakistan

Korea Lab 2020 - NEW DATES

Jul 27 2020 Kintex, South Korea

DXC 2020 - ONLINE EVENT

Aug 03 2020 Lombard, IL, USA

View all events