MASS-SPECTROMETRIC INVESTIGATION ON RARE-EARTH TRIS-DIGLYCOLATE COMPLEXES UPON LIQUID SECONDARY-ION MASS-SPECTROMETRY

Yttrium and lanthanum tris-diglycolates were examined by the positive and negative liquid secondary ion mass spectrometry using glycerol and triethanolamine matrices. Application of the LSIMS of positive ions t o era mi ne the complexes in glycerol caused tile interactions between investigated compounds and a glycerol matrix. The results for Y and L a tris-complexes in the negative LSIMS study in triethanolamine have i ndicated the reduction of matrix-complex interactions. In the series o f the elements of group 4f (except promethium) tris-diglycolates, two different types of ionization, i.e. detachment of a proton or electron capture, have been observed. The ionization occurring via detachment of a proton was identified for the whole series of compounds, includin g the europium-diglycolate complex. Electron capture has been detected to be the second type of ionization of Eu(DGA)(3) being followed by t he process of fragmentation, consisting in the loss of IIDGA neutral s pecies.