Analysis of AOF (Adsorbable Organic Fluorine) According EPA Method 1621

User Benefits

- The combination of the combustion unit and IC can perform AOF analysis according EPA Method 1621. - AOF analysis is a simplified and useful technique for screening PFAS. - The CIC system enables automation of the entire process from sample combustion to ion chromatography analysis.

Introduction

The US Environmental Protection Agency (USEPA) has published Method 1621, a screening method for the determination of AOF in aqueous matrices by combustion Ion chromatograph (CIC). This method detects organic fluorine compounds that are dissolved in water. The common sources of organic fluorine compounds are PFAS and non-PFAS fluorinated compounds such as pesticides and pharmaceuticals. AOF compounds in the sample are adsorbed on a granular activated carbon (GAC) and decomposed by combustion. The generated combustion gas is collected in an absorbing solution and analyzed for fluoride by ion chromatography. An advantage of this technique is that it provides information on the total amount of PFAS that may not be targeted by other selective chromatography methods. In this application news, we introduce the analysis of AOF with CIC. Perfluorohexane sulfonic acid (PFHxS), the prescribed spiking compound in EPA Method 1621, was evaluated for initial precision and recovery (IPR).

February 12, 2025 GMT