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. Author manuscript; available in PMC: 2023 Jul 5.
Published in final edited form as: Anal Chem. 2022 Jun 21;94(26):9226–9233. doi: 10.1021/acs.analchem.1c05136

Table 2:

Matrix effects and ion suppression percentage for analytes 1, 3, and 5 for cVSSI-APCI-MS and ESI-MS.

Analyte Matrix Effects (%) a Ion Suppression (%) b
cVSSI-APCI HESI cVSSI-APCI HESI
Thymine 86 24 14 76
Theophylline 79 24 21 76
Vitamin D2 94 29 6 71
a

Calculated using equation 1

b

Calculated using equation 2