Quantitative Analysis of Nine Haloacetic Acids in Tap Water Using LCMS-8050RX

User Benefits

- Enable users to analyze nine haloacetic acids only 15 minutes per cycle using a simple dechlorination pretreatment. - Enable users to detect nine haloacetic acids at 2 μg/L in water. - Enable users to analyze nine haloacetic acids with good repeatability and recovery rates that are compliant with validation guidelines.

Introduction

Haloacetic acids in tap water are by-products from disinfection processes during water treatments. In Japan, the Ministerial Ordinance Concerning Water Quality Standards specifies drinking water quality standards for three haloacetic acids: monochloroacetic acid (MCAA), dichloroacetic acid (DCAA), and trichloroacetic acid (TCAA) (with limit values of 0.02 mg/L for MCAA, 0.03 mg/L for DCAA, and 0.03 mg/L for TCAA, respectively). The ordinance also specifies items for further study for the following six additional acids: bromochloroacetic acid (BCAA), bromodichloroacetic acid (BDCAA), dibromochloroacetic acid (DBCAA), monobromoacetic acid (MBAA), dibromoacetic acid (DBAA), and tribromoacetic acid (TBAA). The EU issued a directive, which became effective in 2020, that regulates five haloacetic acids, that is, the three acids governed by Japanese water quality standards as well as MBAA and DBAA. Haloacetic acids are analyzed using gas chromatography-mass spectrometry (GC/MS) or liquid chromatography-mass spectrometry (LC/MS). In particular, the LC/MS enables more efficient measurements since dechlorination is the only for required pretreatment. This Application News describes an example of analyzing the nine haloacetic acids using the LCMS-8050RX, triple quadrupole mass spectrometer system.

1 de octubre de 2024 GMT