JOURNAL OF CHROMATOGRAPHIC SCIENCE, cilt.58, sa.2, ss.98-108, 2020 (SCI-Expanded)
Analysis of plant growth regulators (PGRs) should be approached by considering their extremely
low concentrations and serious interfering effects that result from the matrix of various plant
tissues. In the current research, the separation and simultaneous determination of different classes
of phytohormones in 14 seaweeds collected from Turkey seashores were achieved by using solidphase
extraction (SPE) followed by a rapid and sensitive liquid chromatography tandem mass
detection method. OASIS HLB (Hydrophilic-Lipophilic Balance) cartridges were successfully used
for SPE process to eliminate the matrix effect and enhance the PGRs including zeatin, benzyl amino
purine, indole-3-acetic acid, abscisic acid and gibberellic acid within partially different polarities.
Based on the optimized experimental conditions, the method presented excellent performance
related to linearity (r, 0.9996–0.9999) within the ranges of 0.5–500 ng/mL, relative standard
deviation values ((1.43–2.01) for intraday and (2.36–3.50) for interday)), the limit of detection
(0.01–0.84 μg/L) and the limit of quantification (0.02–2.76 μg/L). The obtained results confirm that
the SPE–liquid chromatography/tandem mass spectrometry method performed is highly effective
and convenient for routine analyses of trace amounts of the tested phytohormones in seaweeds
and any other plant samples as well.