...Per-and polyfluorinated alkyl substances (PFAS) are a group of widely used industrial compounds the world. Because of their inertness, PFAS are used in tubing and other liquid-contacting parts of an HPLC ... PFAS Delay Column ... Traps system-related PFAS, preventing interference and ensuring accurate trace -level analysis of PFAS in samples. Universal compatibility; works with: o Any HPLC or UHPLC up...
... are present is inside the very instruments used for PFAS analysis of environmental samples. Background PFAS on trace-level analysis, so another solution is required. In a standard setup, instrument-related PFAS ... PFAS interferences, PFAS analysis...
ChromaBLOGraphy: What are GenX and PFBS? Why are they important in PFAS analysis?
Analysis of PFAS (per- and polyfluorinated alkyl substances) has been a hot topic for envoironmental labs for the last several years. Currently there are two C8 based PFAS compounds (PFOA and PFOS) with a health advisory level of 70 ppt in drinking water announced by the US EPA. In 2018 at the National Leadership Summit, […]
... for PFAS analysis of environmental samples. Background PFAS contamination can interfere with low . Then, during the course of a gradient analysis, PFAS from the sample will begin to move through ... improve trace-level PFAS analysis by removing the impact of system-related interferences. Using a PFAS delay column is an effective way to separate target PFAS in samples from interferences ... PFAS interferences, PFAS analysis...
ChromaBLOGraphy: Are You Interested in Ultrashort-Chain PFAS Analysis? Be Sure to Screen Your Solvents/Solutions for Contamination
Trifluoroacetic acid (TFA) is the perfluorinated analogue of acetic acid with the shortest possible chain length (C2) among per- and polyfluoroalkyl substances (PFAS). Together with perfluorinated C3 compounds, they are defined as ultrashort-chain PFAS. C2 and C3 PFAS are ubiquitous and very mobile in global aquatic environment including rain, snow, river, and even ocean. TFA, […]
... analysis. Column Phase Selection The first decision to make when determining which PFAS LC column to use total analysis time). When C8 PFAS were banned, other compounds with shorter alkyl chains were...
ChromaBLOGraphy: See how the PFAS Delay Column works! Psst.. Do not delay your action, and take a look at this now.
Per- and polyfluorinated alkyl substances (PFAS) analysis usually requires very low level detection (parts per trillion level) in drinking water. The most common problem we run into is that PFAS are everywhere, including our lab and the very instrument (LC-MS/MS) we use to detect those compounds, so having system-related background interference is very common. There […]
Published By: Restek Corporation Year of Publication: 2019 Link: https://www.restek.com/Technical-Resources/Technical-Library/Environmental/enviro_EVAR3001-UNV Abstract: Using a PFAS delay column is an effective way to separate target PFAS in samples from interferences caused by PFAS contamination in the LC system. This article explains how the PFAS delay … Continue reading
ChromaBLOGraphy: Sorry for the delay. Here is your chromatogram with and without the PFAS Delay Column.
Sometimes I hear this from customers: “I don’t need a delay column. I haven’t had any trouble without it so far.” It might be true. You may not have any issues without the delay column, especially when your samples are, for example, highly PFAS contaminated soil samples because the interference is too small to affect […]
... analysis. Column Phase Selection The first decision to make when determining which PFAS chemistries for the analysis of short-chain PFAS (C4-C6) and above, the C18 phase proved to be the best choice ... With the expansion of PFAS target analyte lists into shorter chain compounds, the need for better methods is growing. But, when developing new analytical procedures, which PFAS LC column is best...
...? What are typical PFAS analysis levels? What’s different about PFAS ? PFAS analysis is done by contract environmental labs, state and local government labs, and municipal...