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Fragmentation patterns involving ammonium adduct fragment ions: A comparison of the determination of metaldehyde in human blood by HPLC-QqQ-MS/MS and UHPLC-Q-TOF-MS.
Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences 2018 May 16
This paper presents a rapid, sensitive and precise method for the determination of metaldehyde in human blood, using ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry and high-performance liquid chromatography coupled with triple quadrupole tandem mass spectrometry. Separation was performed with a Poroshell 120 EC-C18 column; 2.7 μm atrazine‑d5 (IS) and 200 mg NaCl were added to the blood sample. Proteins in human blood were precipitated using acetonitrile; the supernatant was then analyzed with the UHPLC-Q-TOF-MS or HPLC-QqQ-MS/MS system. The results of selectivity, linearity, accuracy, precision, limits of quantification, recovery, and matrix effects were sufficient to enable the measurement of metaldehyde in human blood samples. In addition, we proposed a fragmentation pathway involving ammonium adduct fragment ions for metaldehyde.
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