TY - JOUR
T1 - Static secondary ionization mass spectrometry analysis of tributyl phosphate on mineral surfaces
T2 - Effect of Fe(II)
AU - Groenewold, Gary S.
AU - Ingram, Jani C.
AU - Delmore, James E.
AU - Appelhans, Anthony D.
N1 - Funding Information:
The authors thank Del Miley for performing the SEM/EDS analyses, Mamie Cortez for SIMS data acquisition, and Anita Gianotto for assistance with data reduction. This work was supported by the U.S. Department of Energy, Office of Technology Development, DOE Idaho Operations Office (Contract DE-AC-07-761D01570).
PY - 1995
Y1 - 1995
N2 - The static secondary ionization mass spectrometry (SIMS) spectrum of tri-n-butyl phosphate (TBP) on a variety of basalt and quartz samples is affected by the chemical composition of the mineral surface. When TBP is adsorbed on Fe(II)-bearing surfaces, the compound undergoes concomitant H− abstraction and reduction, followed by the elimination of two C4H8 molecules to form an ion at m/z 137+. When TBP is adsorbed to quartz or other nonreducing surfaces, it merely undergoes protonation and elimination of three C4H8 molecules to form H4PO4+. When TBP is adsorbed to Fe(III)-bearing surfaces, it undergoes H− abstraction and elimination of two C4H8 molecules, to form an ion at m/z 153+. These conclusions are supported by model studies that employed FeO, Fe2O3, TBP, and tributyl phosphite. The results show that the SIMS spectrum is very sensitive to the mode of TBP adsorption on the mineral surface.
AB - The static secondary ionization mass spectrometry (SIMS) spectrum of tri-n-butyl phosphate (TBP) on a variety of basalt and quartz samples is affected by the chemical composition of the mineral surface. When TBP is adsorbed on Fe(II)-bearing surfaces, the compound undergoes concomitant H− abstraction and reduction, followed by the elimination of two C4H8 molecules to form an ion at m/z 137+. When TBP is adsorbed to quartz or other nonreducing surfaces, it merely undergoes protonation and elimination of three C4H8 molecules to form H4PO4+. When TBP is adsorbed to Fe(III)-bearing surfaces, it undergoes H− abstraction and elimination of two C4H8 molecules, to form an ion at m/z 153+. These conclusions are supported by model studies that employed FeO, Fe2O3, TBP, and tributyl phosphite. The results show that the SIMS spectrum is very sensitive to the mode of TBP adsorption on the mineral surface.
UR - http://www.scopus.com/inward/record.url?scp=0000898382&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0000898382&partnerID=8YFLogxK
U2 - 10.1016/1044-0305(94)00125-J
DO - 10.1016/1044-0305(94)00125-J
M3 - Article
C2 - 24214114
AN - SCOPUS:0000898382
SN - 1044-0305
VL - 6
SP - 165
EP - 174
JO - Journal of the American Society for Mass Spectrometry
JF - Journal of the American Society for Mass Spectrometry
IS - 3
ER -