Analysis of Perchlorate, Bromate and Halo Acetic Acids in Various Waters by Tandem Suppressed Conductivity and Mass Spectroscopy

Topics in Drinking Water
Oral Presentation

Prepared by J. Gandhi
Metrohm USA, 1455 E.Sam Houston Parkway South, Ste 170, Pasadena, TX, 77503, United States


Contact Information: [email protected]; 713-202-8363


ABSTRACT

Perchlorate salts are being used as rocket propellants, in fireworks and in electroplating industry among others. Since last decade, Perchlorate ion is analyzed in various matrices using various Ion Chromatography methods. In addition, studies from NSF and CDC concluded safe levels of Perchlorate intake per day for an adult human. As of December 2016, USEPA expressed intention to regulate in drinking water with low g/L levels. Along with analysis of Perchlorate, there are major challenges for Bromate and Halo Acetic Acids analysis.
This presentation will encompass comprehensive analysis scheme for Perchlorate, Bromate and Halo Acetic Acids (UCMR4 analytes) including pros and cons of each of the existing USEPA methods like simple isocratic anion exchange with conductivity (USEPA 314.0) and hyphenated technique like ICMS, ICMSMS. Data from a newer method using both suppressed conductivity and tandem mass spectrometry with direct injection of water will be discussed.