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Table. 8.

Table. 8.

Data recorded from five injections of PCP and its IS, PCP-D5

Precursor (m/z) Product (m/z) Mean peak area CV (%) of peak area % Difference from accurate mass area

244.0 91 6,228,332 1.2 –9
244.2 91 6,863,210 1.3 NA
244.4 91 6,165,287 1.0 –10

Precursor (m/z) Product (m/z) Mean peak area ratio CV (%) of peak area ratio % Difference from accurate mass area ratio

244.0 91 62 1.4 –9.0
244.2 91 68 1.5 NA
244.4 91 61 1.0 –10.0

The peak areas (top) demonstrate a reduction in signal due to incorrect m/z acquisition. Normalization by the IS (bottom) is indicative of the quantitative effect.

Abbreviations: PCP, phencyclidine; IS, internal standard; NA, not applicable.

Ann Lab Med 2022;42:531~557 https://doi.org/10.3343/alm.2022.42.5.531

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