Determination of 99Tc in fresh water using TRU resin by ICP-MS

• Published in: Analytica chimica acta Vol. 988; pp. 114 - 120
• Main Authors: Guérin, Nicolas, Riopel, Remi, Kramer-Tremblay, Sheila, de Silva, Nimal, Cornett, Jack, Dai, Xiongxin
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 02.10.2017; Elsevier BV
• Subjects: Anion exchange; Anion exchange resin; Anion exchanging; Boiling; Environmental water samples; Evaporation; Fresh water; Freshwater environments; Inductively coupled plasma mass spectrometry; Mass spectrometry; Mass spectroscopy; Potassium; Potassium permanganate; Resins; Rhenium; Sulfuric acid; Technetium; Technetium-99; TRU resin; Water analysis; Water sampling; Environmental water samples; Anion exchange resin; Rhenium; Inductively coupled plasma mass spectrometry; TRU resin; Technetium-99
• ISSN: 0003-2670; 1873-4324
• DOI: 10.1016/j.aca.2017.08.013

Technetium-99 (99Tc) determination at trace level by inductively coupled plasma mass spectrometry (ICP-MS) is challenging because there is no readily available appropriate Tc isotopic tracer. A new method using Re as a recovery tracer to determine 99Tc in fresh water samples, which does not require any evaporation step, was developed. Tc(VII) and Re(VII) were pre-concentrated on a small anion exchange resin (AER) cartridge from one litre of water sample. They were then efficiently eluted from the AER using a potassium permanganate (KMnO4) solution. After the reduction of KMnO4 in 2 M sulfuric acid solution, the sample was passed through a small TRU resin cartridge. Tc(VII) and Re(VII) retained on the TRU resin were eluted using near boiling water, which can be directly used for the ICP-MS measurement. The results for method optimisation, validation and application were reported. [Display omitted] •Tc(VII) can be extracted and purified from potential interferents with a TRU resin.•Re(VII) can be used as a recovery tracer.•No vaporisation step is needed for this method.•Potassium permanganate can be used to elute Tc(VII) and Re(VII) from an anion exchange resin.•A low detection limit of 4.01 × 10−13 Bq·L−1 was obtained.