Определение урана в водных растворах методом времяпролетной масс-спектрометрии с импульсным тлеющим разрядом после его концентрирования окисленными углеродными нанотрубками

Анна Денисовна Титова, Виктор Николаевич Постнов, Сергей Сергеевич Савинов, Надежда Валерьевна Столярова, Наталья Борисовна Иваненко, Виктория Александровна Чучина, Анна Романовна Губаль, Александр Ахатович Ганеев

Research output

Abstract

The pollution of the environment with uranium dictates the need to control the concentration of this
element in natural waters to the permissible limits for the stability of the ecosystems and public health. In 2011,
WHO set maximum permissible concentration of uranium in water to 0.03 ppm due to the strong toxicity and
radioactivity of uranium in water. Therefore, the continuous monitoring of uranium content is an important
task for the safety and health of the citizens. To determine the low uranium content in natural waters, the
conservation of the studied solutions is necessary. However, this method of storage and transportation
is not always simple. In the current paper, as a convenient method of concentrating uranium, preserving
the sample and transporting it, we used the method of sorbing uranium on sorbents. Single-layer carbon
nanotubes were used as sorbents. Their surfaces were modified using wet chemical oxidation and synthesis
with Aerosil A-380 silica. Two schemes were considered for concentrating the uranium on the surface of the
sorbent: individual carbon nanotubes and nanotubes modified with silica. The direct analysis was used to
determine the content of uranium in the sorbent, namely, time-of-flight mass spectrometry with the pulsed
glow discharge (GD-MS). The most effective approach for the determination of uranium in water was the
sorption of uranium on the tablet consisting of oxidized nanotubes modified with silica. The limit of detection
in this case was 0.2 ppb.
Translated title of the contributionDetermination of uranium in aqueous solutions by the time-of-flight mass-spectrometry with a pulsed glow discharge after its accumulation on the oxidized carbon nanotubes
Original languageRussian
Pages (from-to)96-106
Number of pages11
JournalАНАЛИТИКА И КОНТРОЛЬ
Volume24
Issue number2
DOIs
Publication statusPublished - 2020

Scopus subject areas

  • Chemistry(all)

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