Assessment of pheniramine in alternative biological matrices by liquid chromatography tandem mass spectrometry

In this study, pheniramine was quantified in both conventional and alternative specimens of twenty chronic drug abusers, aged 16 –50 years, who were positive for pheniramine in comprehensive toxicological screening for drugs by gas chromatography with mass spectral detection in positive electron impact mode. Pheniramine was extracted from biological specimens using solid phase extraction and liquid chromatography tandem ma ss spectrometry was employed for quantification. Chromatographic separation was carried out on a Poroshell120EC-18 (2.1 mm × 50 mm × 2.7 µm) column using water-acetonitrile in formic acid (0.1%) mobile phase in gradient elution mode with 500 μL/min flow rate. Positive electrospray ioniza tion mode and multi-reaction monitoring with ion transitions m/z 241.3 → 195.8 and 167.1 for pheniramine and m/z m/z 247.6 → 173.1 for pheniramine-d6 were employed. The quantification method showed good linear ranges of 2–1000 ng/mL in blood, urine, and oral fluid; 2–1000 ng/mg in hair and 5–1000 ng/mg in nail with ≥ 0.985% coefficient of linearity. The retention time of pheniramine was 3.0  ± 0.1 min. The detection and lower quantification limits were 1 ng/mL and 2 ng/mL for blood, urine, oral fluid and hair whereas 2.5 ng/mg and 5 ng/mg for nail, respectively. Mean extraction recovery and ionization suppression ranged 86.3–95.1% and -4.6 to -14.4% in the studied matrices. In tra-day and inter-day precision were 4....
Source: Forensic Science, Medicine, and Pathology - Category: Forensic Medicine Source Type: research