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PFAS Delay Column

...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:Any HPLC or UHPLC up to 15...

2.0 mL, 9 mm Solid-Top Polyethylene Caps

... pierceable cap. PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS-sensitive methods...

Limited-Volume 2.0 mL, 9 mm Screw-Thread Polypropylene Vials

... mm screw-thread caps. PTFE-free—ideal for PFAS analysis (e.g., EPA 537) and other PFAS...

Eliminate the Impact of Instrument-Related PFAS Interferences by Using a Delay Column (PDF 761kB)

... 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...

Eliminate the Impact of Instrument-Related PFAS Interferences by Using a Delay Column

... 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: 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, […]

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, […]

News: Webinar: How to Analyze Extended PFAS Lists Including Ultrashort-Chain (C2-C3) PFAS

Register today for this timely C&EN webinar about PFAS analysis and incorporating ultrashort-chain PFAS into an existing method for legacy and alternative compounds. Mike Chang, Global Environmental Market Business Development Manager at Restek, will discuss LC-MS/MS method development for C2 … Continue reading

PFAS LC Column Anatomy: Which Phase, Dimensions, and Particle Type Are Best? (PDF 1086kB)

... 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...

Restek Essentials: Featured Chromatography Products 2020.2 (PDF 7897kB)

... sample prep: www.6 restek.com/resprep PTFE-Free Vials and Caps Ideal for PFAS Analysis Vials fit all 2 the polarity range, so you can select a column perfectly matched to your analysis. ID df Length temp. limits...

News: Eliminate the Impact of Instrument-Related PFAS Interferences by Using a Delay Column

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: 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 […]

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 […]

PFAS LC Column Anatomy: Which Phase, Dimensions, and Particle Type Are Best?

... 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...

Frequently Asked Questions: HPLC and UHPLC

...? 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...

For advanced chromatogram searching, please check out our Chromatogram Library Search Tool.

EPA Method 537.1 on Raptor C18

LC_EV0560

Column: Raptor C18 (cat.# 9304A52), Dimensions:50 mm x 2.1 mm ID, Particle Size: 2.7 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Ultra-short Chain, Legacy, and Alternative PFAS on Raptor C18 in Reagent Water

LC_EV0555

Column: Raptor C18 (cat.# 9304A1E), Dimensions:100 mm x 3 mm ID, Particle Size: 2.7 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Perfluorinated Alkyl Acids (PFBS, PFOA, PFOS, and HFPO-DA/GenX) on Raptor C18 5 μm

LC_EV0553

Column: Raptor C18 (cat.# 9304552), Dimensions:50 mm x 2.1 mm ID, Particle Size: 5 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Perfluorinated Alkyl Acids on Raptor C18 by LC-MS/MS for EPA Method 537

LC_EV0548

Column: Raptor C18 (cat.# 9304552), Dimensions:50 mm x 2.1 mm ID, Particle Size: 5 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Perfluorinated Compounds (PFCs) on Raptor C18 (1.8 μm)

LC_EV0540

Column: Raptor C18 (cat.# 9304252), Dimensions:50 mm x 2.1 mm ID, Particle Size: 1.8 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Perfluorinated Compounds (PFCs) on Raptor C18 (1.8 μm)

LC_EV0547

Column: Raptor C18 (cat.# 9304252), Dimensions:50 mm x 2.1 mm ID, Particle Size: 1.8 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

Perfluorooctanoic Acid (PFOA) and Perfluorooctanesulfonic Acid (PFOS) on Raptor C18 by LC-MS/MS

LC_EV0536

Column: Raptor C18 (cat.# 9304512), Dimensions:100 mm x 2.1 mm ID, Particle Size: 5 µm, Pore Size: 90 Å, Temperature: 40 °C
Detector: MS/MS

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