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. 2019 Sep 19;7:e7695. doi: 10.7717/peerj.7695

Table 2. Mass spectrometry conditions—transitions, retention times, collision energies (the analytes marked by * were used for quantification).

Compound name Precursor ion Product ion RT (min) Collision energy
d7-K1 458.3 194.1 4.8 24
Vitamin K1 451.4 199.2 4.8 32
Vitamin K1* 451.4 187.1 4.8 24
d7-MK-4 452.4 194.1 3.1 20
MK-4 445.3 227.1 3.1 24
MK-4* 445.3 187 3.1 20
d7-MK-7 656.5 194.1 7.9 32
MK-7 649.5 227.2 7.9 32
MK-7* 649.5 187 7.9 32