To demonstrate how the Python script works, a synthetic SI PDF was generated and placed in the Downloads folder. Including the above paragraph within that file results in the output shown in Figure (section a). The exact mass is followed by the recalculated value shown in parentheses, while the mass errors refer to the reported calculated and recalculated masses (in parentheses) in relation to the found mass. In the example above, the respective mass errors highlighted in red are inconsistent with an allowed arbitrary threshold of 10 ppm. Tolerated deviations can vary between journals.