**Table 6.**

*Robustness.*

DAD comes first because it is a non-destructive detection method. MSD not only provides information on the qualitative chemical composition of the sample but also in certain situations allows us to determine the quantitative content of the component (glutathione) that is not visible to DAD. The calibration curve for the MSD is not linear, but parabolic, which probably reflects the mutual repulsion of like-charged particles in the gas phase. The use of MSD for quantitative analysis requires further study and justification.
