Title Pseudo-stir bar hollow fiber solid/liquid phase microextraction for the determination of flavonoids in Lamiaceae family plant Type Presentation Keywords Pseudo-stir bar microextraction, cellulose nanofiber,flavonoids , box behenken design, HPLC Abstract متن چکیده در مستندات ضمیمه شده است. Researchers Mohammad Reza Hadjmohammadi (Third Researcher), shabnam Najafi aslipashaki (Second Researcher), fatemeh salehtabar (First Researcher)