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The simultaneous determination of Gd3+ and Gd-DTPA (DTPA: diethylenetriamino-pentaacetic acid), often used as contrast agent, is described. The proposed approach combines size-exclusion chromatography (SEC) and inductively coupled plasmamass spectrometry (ICPMS) for element-selective detection in order to determine also high-molecular Gd-complexes if present. This method was applied to the analysis...
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