Publication details

Determination of deuterium oxide content in water based on luminescence quenching

Authors

KUČERA Josef LUBAL Přemysl LIS S. TÁBORSKÝ Petr

Year of publication 2018
Type Article in Periodical
Magazine / Source Talanta
MU Faculty or unit

Faculty of Science

Citation
Web https://www.sciencedirect.com/science/article/pii/S0039914018302534
Doi http://dx.doi.org/10.1016/j.talanta.2018.03.016
Keywords Deuterium oxide determination; Time-Resolved Luminescence Spectroscopy; Luminescence quenching; Ln(III) luminescence; Organic compounds luminescence
Description Water molecules (H2O) often reduce luminescence lifetimes of various luminescence probes. The change of lifetime is usually caused by dynamic luminescence quenching induced by O-H oscillators which effectively take away energy from excited molecule. The process can be described by Stern-Volmer equation. We have studied selected luminescence systems where it is possible to detect considerable changes of lifetime in presence/absence of H2O and D2O in this work for analytical purposes. We have tested both, inorganic (Ln(3+)) and organic compounds using three different instrumentation in order to find the largest change between tau(H) and tau(D). The Ln(3+) containing systems have shown considerable increase/decrease of lifetimes in the presence/absence of D2O (Eu3+ : tau(D)/tau(H) = 34.5) whereas organic systems gave significantly lower values of tau(D)/tau(H) (coumarin 123 lifetime ratio, tau(D)/tau(H) = 1.94). The calculated LOD varied from 0.04 mol l(-1) (samarium nitrate) to 6.55 mol l(-1) (riboflavin).