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, 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!
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
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Nitrogen filter
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Adjustable flow meter
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Phthalate free silicon tubing eliminates contamination concerns
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High temperature limit switch for safety
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Dual band spring hoist assembly
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Precision needle valve tube assembly
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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
| Instrumental Name | Teflon-Free 12p N-EVAP | Teflon-Free 24p N-EVAP |
| Bath Type | Water | Water |
| Instrumental Catalog Number | 11155-NT | 11250-NT |
| Number of Sample Positions | 12 | 24 |
| Standard Dimensions (w x d x h) | 13 x 11 x 31 in 33 x 28 x 79 cm |
16 x 15 x 33 in 41 x 38 x 61 cm |
| Reduced Height Dimensions (w x d x h) | 13 x 11 x 24 in 33 x 28 x 61 cm |
16 x 15 x 24 in 41 x 38 x 61 cm |
| Sample Holder Layout | Circular | Circular |
| Gas Manifold Layout | Single Ring | Single Ring |
| Test Tube Range (Standard) | 10-30 mm OD | 10-30mm OD |
| Test Tube Range (Optional) | 5-16 mm OD | 30-70 mm OD |
| Gas Flow Meter | 0-10 L/min | 0-20 L/min |
| Stainless Steel Needles (Length x Gauge) | 4.0 in x 19 ga 102 mm x 19 ga |
4.0 in x 19 ga 102 mm x 19 ga |
| Sample Tray Lift Mechanism | Dual Band Spring Hoist Assembly | Dual Band Spring Hoist Assembly |
| Standard Gas Input Range | 20-30 psig | 20-30 psig |
| Gas Input Range w/Optional Pressure Reducing Regulator | 30-160 psig | 30-160 psig |
| Heating Device Specs | ||
| Model Number |
5585 | 9125 |
| Heating Medium | Water | Water |
| Inside Dimensions (Diameter x Depth) | 8.5 x 4.5 in 21.6 x 11.4 cm |
12.0 x 4.5 in |
| Outside Dimensions (w x d x h) | 13 x 11 x 7 in 33 x 28 x 18 cm |
16 x 15 x 7 in 41 x 38 x 18 cm |
| Total Wattage | 550 W | 900 W |
| Bath Temperature Range | 30-90 °C | 30-90°C |
| Temperature Controller Type |
Mechanical Thermostat | Mechanical Thermostat |
| Controller Accuracy | +/- 2 °C | +/- 2 °C |
TESTIMONIALS
RESOURCES
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N-EVAP Instruction Manual (Catalog #s 11106, 11155, 11250) for Water Bath Models - Version 22.5
- 12 Position N-EVAP Brochure and Specifications
- 24 Position N-EVAP Brochure and Specifications
ACCESSORIES
- Small vessel sample holder for 12 position N-EVAP model only, for vial outside diameters of 5-16 mm (cat# NA1132)
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Large vessel sample holder for 24 position N-EVAP model only, for vial outside diameters of 30-56 mm (cat# NA1113)
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Teflon-free nitrogen generator (cat# NA1955-NT)
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Pasteur pipette adapters (cat# NA0636)
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Teflon-free pressure reducing regulator 0-160 psi (cat# NA0630-NT)
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Various needle sizes and gauges
REPLACEMENT PARTS
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P0627: Valve Tube Assembly – Post 1997
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P0607: Luer & washer for N-EVAP valve tube
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P0634: Tube Fitting nylon 3 part for N-EVAP valve tube
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