An interesting review of different instrumental techniques with their limitations for the analyses of PFR has recently been presented by Veen et al . It is reported that Gas chromatography-flame photometric detection (GC-FPD), GC-nitrogen-phosphorus detection, GC-atomic emission detection (NPD), GC-atomic emission detection (AED), GC-mass spectrometry (MS) as well as liquid chromatography (LC)-MS/MS and GC-Inductively-coupled plasma-MS (ICP-MS) are some of the methods are used. The GC-ICP-MS method was found to be a promising method, because it provides much less complex chromatograms while offering the same recoveries and limits of detection (LOD) (instrumental LOD is 5-10 ng mL -1) compared to GC-NPD and GC-MS, which are frequently used methods for PFR analysis. GC-MS offers a higher selectivity than GC-NPD and the possibility of using isotopically labelled compounds for quantification.