Influence of matrix effects on methods for the quantification of major and impurity elements in brass using secondary ion mass spectrometry (SIMS)

Self-Assembled Monolayers of Dodecyl and Hydroxy-dodecyl Phosphates on Both Smooth and Rough Titanium and Titanium Oxide Surfaces

“…The negative ion spectra exhibit O - and OH - as the most prominent peaks observed from the oxide surface. Smaller peaks due to hydrocarbon contamination and some recombinant Ti a O b C c H d peaks at higher mass ranges are also detected. , These data are consistent with results published previously on clean titanium oxide surfaces. , …”

“…In general, SIMS cannot be considered a quantitative analytical technique due to strong matrix effects on secondary ion intensities. − However, under favorable conditions, for example, when a series of closely chemically related samples are measured under the same experimental conditions, semi quantitative results can be achieved. , We used sets of SAM samples that were prepared according to the same protocol and measured using the same experimental parameters. In the positive ion mode, the DDPO 4 self-assembled surface displays similar hydrocarbon ion peaks to that of the bare oxide (in this case due to adventitious hydrocarbon contamination), but with strongly decreased contaminant peak intensity (Na + , NH 4 + , etc.…”

Acquisition and quantification of ion images with a camera-based detection system and classical quantification algorithms

“…Although the SF and MISR methods both provide good results , there is an important difference in their sensitivity to local variations in the matrix composition . If the results from previous studies [20] can be extrapolated to these matrices, it is clear that the MISRmethod is far more sensitive to local variations in the matrix composition. For a number of elements, the concentration of the impurity elements in the inclusions may be of the order of a few percent, and the local matrix composition does not agree with the mean composition of the sample .…”

“…Despite this promising evolution, the progress here is hampered by the quantification problems. Commonly used methods, such as the local thermodynamic equilibrium (LTE) model, the sensitivity factor (SF) method [16][17][18], the matrix ion species ratio (MISR) method [19,20], and ion implantation [21] have all been applied with varying degrees of success to convert the ion images from intensity space to concentration space [2,3,9,[22][23][24][25][26][27].…”