Assigned Calibration Time Dependent Intensity (TDI) Acquisition
Another method for Time Dependent Intensity (TDI) element calibration corrections is the assigned calibration method. In this method an unknown sample is automatically acquired one element at a time by clicking the Assigned Calibration Time Dependent Intensity (TDI) Acquisition option to allow the Time Dependent Intensity (TDI) element effect to be calibrated precisely on a single sample. This sample will be started automatically using the sample name in the Time Dependent Intensity (TDI) Sample Name field the next time a sample acquisition is started.
The count time is adjusted based on the Time Dependent Intensity (TDI) Count Time Interval parameter. For example, if the user enters 5 in the Time Dependent Intensity (TDI) Count Time Intervals text field, and the default on-peak count time is 10 seconds, then the software will automatically count five 2 seconds intervals for the on-peak elements that are first in spectrometer order. Off-peak acquisitions are not affected.
The stage is automatically moved in X and Y for each element to ensure that a fresh sample spot is utilized for the Time Dependent Intensity (TDI) calibration.
The Time Dependent Intensity (TDI) element calibration can be assigned to any element in a sample or range of samples provided that it was acquired as the first element on that spectrometer. See the Analyze! window Standard Assignments button for the Time Dependent Intensity (TDI) element calibration display and assignment.