Abstract
Dimethyl sulfoxide (DMSO) is a well-known organic solvent that can be used for biological applications. DMSO is miscible with water, and it is very common that the two solvents are mixed for some applications. It is important to detect water in DMSO, and this has been done using the luminescence decay lifetimes from Eu3+ ions. We observed that the emissions of Eu3+ in DMSO are very strong and very sensitive to water. The emission band from the 5D0 → 7F2 transition has two peaks at 613 and 617 nm, respectively, and these two peaks change in the opposite ways when water is added into DMSO. The intensity ratio of the two peaks follows nearly perfect linear dependence on the water concentration added in DMSO. This linear relationship provides a new and convenient method for water measurement in DMSO.
Original language | English |
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Pages (from-to) | 1879-1882 |
Number of pages | 4 |
Journal | Analytical Chemistry |
Volume | 83 |
Issue number | 6 |
DOIs | |
Publication status | Published - 15 Mar 2011 |
Externally published | Yes |