DETERMINATION OF EXTRACTABLE ORGANIC CHLORINE BY ELECTROTHERMAL VAPORIZATION INDUCTIVELY-COUPLED PLASMA-MASS SPECTROMETRY

Extractable organic chlorine (EOCI) is a sum parameter used to describ e the organic chlorine concentration in solid or liquid samples that c an produce injurious effects on health. In this work, a new method is presented for the determination EOCI. Inductively coupled plasma mass spectrometry (ICP-MS) is not especially suitable for the determination of chlorine owing to the high ionization energy of chlorine. However, when electrothermal vaporization (ETV) is compared with ICP-MS, the s ensitivity is high enough to facilitate sum parameter analysis from li mited sample volumes. Ethyl acetate has been used as an extraction sol vent. Chlorine was determined by collecting data during heating by mon itoring m/z 35 using the single-ion monitoring mode. The detection lim it for EOCI by ETV-ICP-MS is approximately 10 ng.