SKU: 19041346941

PALL AP-4219 Acrodisc Syringe Filters with PTFE Membrane - 0.45 µm, 25mm (50/pkg 200/cs)

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Description

PALL AP-4219 Acrodisc Syringe Filters with PTFE Membrane - 0.45 µm, 25mm (50/pkg 200/cs)Syringe filters are used in analytical chemistry applications to remove particulate contamination prior to analysis. Filtering a sample prior to sample injection into analytical instrumentation will help protect sensitive parts of the instrument from particulate build up and reduce system downtime. Sample filtration using syringe filters containing 0. 45 m (HPLC) or 0. 2 m (UHPLC) pore size membranes will also extend the life of chromatography columns

Syringe filters are used in analytical chemistry applications to remove particulate contamination prior to analysis. Filtering a sample prior to sample injection into analytical instrumentation will help protect sensitive parts of the instrument from particulate build-up and reduce system downtime. Sample filtration using syringe filters containing 0.45 μm (HPLC) or 0.2 μm (UHPLC) pore size membranes will also extend the life of chromatography columns by preventing particulate from blocking the flow path between the column packing.

PTFE membrane is highly chemically compatible for the filtration of harsh solvents that can destroy other membrane materials. PTFE is a hydrophobic membrane, so it will repel water and is not suitable for the filtration of aqueous solutions.

As well as being suitable for the filtration of organic solvents in applications such as HPLC and UHPLC sample preparation, the hydrophobic nature of the PTFE membrane makes these syringe filters ideal to use in gas filtration or as a moisture barrier in venting applications.

Pall provides HPLC certification with these products, ensuring that analytical results will not be compromised by extractable filter materials. Pall membranes are tested for compatibility with common HPLC solvents including water, methanol, and acetonitrile, using established HPLC procedures. In addition, to verify low levels of UV-detectable extractables, samples of the syringe filters are evaluated prior to release.

Acrodisc PSF Syringe Filters feature a large effective filtration area (3.9 cm2) for increased sample throughput, ideal for sample volumes of ≤ 150 mL. Pall Acrodisc PSF Syringe Filters are designed to be fully compatible for use with automated robotic handling systems offering reliable and worry-free operation.

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SKU: 19041346941

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4.3 ★★★★★
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Tonia Robinson
Lake Worth, US
★★★★★ 5
Leave a toy for the dog when going to work, and no housebreaking when coming back
Color: Purple-Blue, Size: 2pcs
The dog is quite clingy. Every time it sees me put on my shoes to go out, it gets nervous. Since having this bear around, when it goes out, its attention is all on the toys, and when it comes back home, its mood has become much more stable.
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Reviewed in the United States on May 26, 2026
A
Verified Purchase
A.pappy
Port Orchard, US
★★★★★ 5
Keeps my dog busy and actually holds up
This jigsaw-style dog toy has been a game changer for keeping my dog entertained. The design is super versatile—you can spread peanut butter (or yogurt, wet food, etc.) into the grooves, and it keeps them busy licking for a long time. What I like most is that it’s not just a lick mat—it’s also a durable chew toy. The material feels strong and holds up really well, even with a dog that usually destroys toys pretty quickly. Toys made from rubber or similar materials tend to last longer and are safer for chewing compared to softer options. The grooves and compartments make it a little more challenging (in a good way), so it takes my dog longer to get through the treats. I’ve even tried freezing peanut butter inside, and that keeps them occupied even longer. Lick-style toys like this are great for slowing dogs down and keeping them calm and engaged. It’s also been really helpful during times when I need a distraction—like when I’m busy, cleaning, or even during grooming. Pros: • Durable and holds up to chewing • Can use peanut butter, yogurt, or other soft treats • Keeps dogs busy for a long time • Helps with boredom and anxiety • Freezable for longer use Cons: • Can get messy depending on what you put in it
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 2, 2026
M
Verified Purchase
Michelle
Massapequa, US
★★★★★ 5
Hubie gives it two paws up !!
Hubie loves this he’s a Great Dane and a busy chewer.
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Reviewed in the United States on April 30, 2026
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Verified Purchase
N.
New York, US
★★★★★ 1
My dog says no
Big block with a pattern on it...dog has absolutely no interest in it.
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Reviewed in the United States on April 9, 2026
K
Kel
Battle Creek, US
★★★★★ 3
Doesn't hold their attention
I have 5 dogs, and only one of them seems to actually want to play with these toys, and even he's not that enthused. And he'll literally play with anything. I think it's the shape that's unappealing. My smallest sniffs and licks it, gives it a little nibble, hoping it will actually taste like peanut butter, but once he realizes it's just plastic he turns his nose up. They are solid, durable toys that should hold up to power chewers, but none of my power chewers care enough to bother for more than a few minutes. Size wise they're perfectly suited for the sizes intended.
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Reviewed in the United States on February 23, 2025

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