1 Preventing False Negatives with High Resolution Mass Spectrometry: The 1 Benzophenone Case 2 H. Gallart-Ayala 1 , O. Nuñez 1 , E. Moyano 1 , M.T. Galceran 1 and C.P.B. Martins 2,* 3 1 Department of Analytical Chemistry, University of Barcelona. Diagonal 647, 08028, 4 Barcelona, Spain. 5 2 Thermo Fisher Scientific, Cardenal Reig 19 Local, 08028 Barcelona, Spain 6 7 Corresponding author: Claudia P.B. Martins, PhD 8 2 Thermo Fisher Scientific, Cardenal Reig 19 Local, 08028 Barcelona, Spain 9 10 Phone: +34932230918 11 Fax: +34932230982 12 e-mail: claudia.martins@thermofisher.com 13 14 Keywords: High Resolution Mass Spectrometry, Orbitrap, Benzophenone, Packaged 15 Food . 16 17 18 19 20 21 22 23 24 25 26