Chemical Safety Science, 2017, Volume 1, No 2, p. 97 — 107

 

Identification of hazardous substances

UDC 541.132                                                                                  Download PDF (Rus)

DOI: 10.25514/CHS.2017.2.10984

 

IDENTIFICATION OF TOXIC CHLORINE-CONTAINING ACIDS IN AQUEOUS MEDIA

G. V. Karpov¹, O. A. Vinogradova², E. S. Vasiliev¹, N. I. Butkovskaya¹, I. I. Morozov¹*, Yu. I. Petrov¹, and A. G. Syromyatnikov¹

¹Semenov Institute of Chemical Physics, Russian Academy of Sciences, Moscow, Russia,

²Dmitry Mendeleev University of Chemical Technology of Russia, Moscow, Russia

Received October 20, 2017

Published December 25, 2017

 Abstract – Transformations of chlorohydrocarbons in the atmosphere result in formation of toxic chloroacetic acids. These acids pose a serious threat to flora and fauna. Mass spectra of aqueous solutions of monochloroacetic, dichloroacetic and trichloroacetic acids have been obtained using the method of electrospraying aqueous solutions of the title compounds. It has been found that the mass spectra contain an acidic residue surrounded by several water molecules. A typical mass spectrum contains a hydrated series of acidic radical ions and degradation products referred to members of the series formed in the course of electrospray procedure. Three types of decay pattern are observed: abstraction of water molecules from the outer sphere of the hydrated shell of acid residue ions and degradation of the acidic residue ions with the disruption of the C-Cl and C-C bonds.

 Keywords: chloroacetic acids, trichloroacetic acid, monochloroacetic acid, dichloroacetic acid, aqueous solution, mass spectra, identification.