---
title: "Teflon-Free N-EVAP Nitrogen Evaporator for PFAS Research"
description: "Browse all of Organomation's Teflon-Free Nitrogen Evaporators meant to dry PFAS samples for environmental labs performing EPA methods 533, 537, and 1633."
type: article
version: 1
version_id: "b98ff046-94f7-4d43-956f-4ff2ea9e6cba"
generated_at: "2026-10-21T18:36:34.806Z"
author: "leading environmental research laboratories"
date_modified: "2026-08-28T14:20:29.933Z"
language: en
reading_time: "4 min"
word_count: 761
keywords: ["Free N", "EVAP Nitrogen Evaporator for PFAS Research"]
url: "https://www.organomation.com/ptfe-free-nitrogen-evaporators-for-pfas-analysis/n-evap-nt"
---

# Teflon-Free N-EVAP Nitrogen Evaporator for PFAS Research

> Browse all of Organomation's Teflon-Free Nitrogen Evaporators meant to dry PFAS samples for environmental labs performing EPA methods 533, 537, and 1633.

## Key Takeaways

- Teflon-Free N-EVAPs for PFAS Research

#11155-NT ; #11250-NT

## Teflon-Free N-EVAPs
for PFAS Research

#### DESCRIPTION

The Teflon-free N-EVAP nitrogen evaporators are designed for laboratories performing PFAS sample preparation and concentration. These evaporators allow multiple samples to be processed simultaneously while eliminating potential fluoropolymer contamination during nitrogen blowdown evaporation. Both the 12 and 24 position models are constructed using 100% Teflon-free components, ensuring that no PTFE or other fluoropolymers are present in the instrument.

Cited in EPA PFAS methods 533, 537.1, and 1633, these N-EVAP models are trusted by leading environmental research laboratories. 

The Teflon-free N-EVAPs are particularly suited for research laboratories, where workflows often involve multiple small batches, varying tube sizes, and shared instrumentation. Both models can accommodate 15 mL and 50 mL centrifuge tubes, providing flexibility for different PFAS preparation procedures. Each sample position includes an individual needle valve, allowing independent nitrogen flow control so samples with different evaporation endpoints can be processed at the same time.

For PFAS laboratories that require flexibility and contamination control, the Teflon-free N-EVAP provides an ideal solution. Laboratories processing large batches of identical samples may instead benefit from Organomation’s [Teflon-free MULTIVAP nitrogen evaporators](https://www.organomation.com/ptfe-free-nitrogen-evaporators-for-pfas-analysis/multivap-nt?hsLang=en), which are designed for higher-throughput testing environments.

Learn how Waters Corporation uses a N-EVAP nitrogen evaporator to dry down their PFAS samples: [Read case study!](https://blog.organomation.com/blog/concentrating-pfas-samples-ahead-of-lcms?hsLang=en)

[](https://blog.organomation.com/blog/concentrating-pfas-samples-ahead-of-lcms?hsLang=en)  *Kari Organtini, Principal Scientist at Waters Corporation*

**Small Footprint**

N-EVAP Models 111 and 112 require about one square foot of bench space

**Flexible**

An adjustable sample holder design fits a wide variety of sample tubes and vials at once

**Teflon-Free Guarantee**

Made with 100% PTFE-free materials to avoid contamination of PFAS samples

**Individualized Control**

Optimize evaporation of diverse samples with individual gas flow control at each vial

#### STANDARD FEATURES

-   Nitrogen filter

-   Adjustable flow meter

-   Phthalate free silicon tubing eliminates contamination concerns

-   High temperature limit switch for safety

-   Dual band spring hoist assembly

-   Precision needle valve tube assembly

-   Needles, 4-inch x 19 gauge with chrome plated brass hub and stainless-steel shaft

#### OPTIONS (Add to main Cat# when purchasing) 

-   220v wiring harness (Option Code# -2)
    -   12 position model: Cat# 11155-NT-2
    -   24 position model: Cat# 11250-NT-2

-   Reduced height (Option Code# -S)
    -   12 position model: Cat# 11155-NT-S
    -   24 position model: Cat# 11250-NT-S

#### SPECS

#### TESTIMONIALS

[](https://blog.organomation.com/blog/organomation-evaporators-save-time-and-money-for-clemson-universitys-plant-and-environmental-science-department?hsLang=en)

#### RESOURCES

-   [What is Nitrogen Blowdown Evaporation](https://www.youtube.com/watch?v=e9dbWmoWwSw)

-   [N-EVAP Instruction Manual (Catalog #s 11106, 11155, 11250) for Water Bath Models - Version 22.5](https://www.organomation.com/hubfs/N-EVAP%20\(Water%20Bath\)%20~%2011106%20~%2011155%20~%2011250%20~.pdf?hsLang=en)[](https://www.organomation.com/hubfs/Website%202021/Products/Nitrogen%20Evaporators/N-EVAP/45%20Position/%5BMANUAL%5D%20N-EVAP%20\(Water%20Bath\)%20_%2011106%20_%2011155%20_%2011250%20_.pdf?hsLang=en)

-   [N-EVAP Parts and Accessories List](https://www.organomation.com/hubfs/N-EVAP%20Accessories%20Sheet.pdf?hsLang=en)

-   [12 Position N-EVAP Brochure and Specifications](https://www.organomation.com/hubfs/12%20Position%20N-EVAP%20Evaporator.pdf?hsLang=en)

-   [24 Position N-EVAP Brochure and Specifications](https://www.organomation.com/hubfs/24%20Position%20N-EVAP%20Evaporator.pdf?hsLang=en)

#### ACCESSORIES

-   Small vessel sample holder for 12 position N-EVAP model only, for vial outside diameters of 5-16 mm (cat# NA1132)

-   Large vessel sample holder for 24 position N-EVAP model only, for vial outside diameters of 30-56 mm (cat# NA1113)

-   Teflon-free nitrogen generator (cat# NA1955-NT)

-   Pasteur pipette adapters (cat# NA0636)

-   Teflon-free pressure reducing regulator 0-160 psi (cat# NA0630-NT)

-   Various needle sizes and gauges

#### REPLACEMENT PARTS

-   P0627: Valve Tube Assembly – Post 1997

-   P0607: Luer & washer for N-EVAP valve tube

-   P0634: Tube Fitting nylon 3 part for N-EVAP valve tube

#### GET A QUOTE

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## About This Content

**Source:** [Teflon-Free N-EVAP Nitrogen Evaporator for PFAS Research](https://www.organomation.com/ptfe-free-nitrogen-evaporators-for-pfas-analysis/n-evap-nt)
**Author:** leading environmental research laboratories

*This content is provided for informational purposes. Please visit the original source for the most up-to-date information.*