VWR Grade No. 494 Filter Paper, Quantitative 28297-930 Review

Let’s Dive into VWR Grade No. 494 Filter Paper, Quantitative 28297-930

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930, manufactured by VWR, isn’t exactly the kind of gear that screams “tactical” or “outdoors” in the traditional sense, but for anyone who’s ever needed precise filtration in the field – whether for water purification, soil analysis, or even rudimentary forensic work – it’s an indispensable tool. Its primary function is to separate solids from liquids with a high degree of accuracy, making it crucial in various scientific and analytical applications. This isn’t your average coffee filter; it’s laboratory-grade stuff.

My journey to discover the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 came from a very specific need: reliably filtering water samples collected in remote areas for later analysis. I needed something that could consistently and accurately remove particulate matter without introducing contaminants of its own. Previous experiences with less-precise filters led to inconsistent results and unreliable data.

Upon receiving the package, the first thing I noticed was the professional, no-nonsense packaging. The paper itself looked and felt different from ordinary filter paper – denser, smoother, and more uniform. Holding it up to the light, you could see a very consistent weave, promising a controlled filtration rate.

I considered other options, including syringe filters and specialized outdoor water filters, but the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 stood out for its high purity, consistent pore size, and relatively low cost for the quantity received. It seemed the best fit for handling larger volumes of water in a field setting where power for a pump-based filter wasn’t guaranteed. The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 was an exciting, if somewhat unconventional, addition to my field kit.

Real-World Testing: Putting VWR Grade No. 494 Filter Paper, Quantitative 28297-930 to the Test

First Use Experience

My initial field test took place during a backcountry survey of a river system known for its high sediment load. I used the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 to pre-filter water samples before using a portable water quality meter. The conditions were challenging: constant drizzle, high humidity, and a significant amount of silt and organic matter in the water.

The filter paper performed admirably. Even with the heavily sedimented water, the filtration rate remained consistent, and the paper didn’t tear or clog prematurely. Setting up a simple filtration apparatus using a funnel and a collection flask was straightforward, and the resulting filtrate was noticeably clearer than water filtered with a standard paper towel (an emergency measure I’d used in the past). The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 proved its worth immediately.

Extended Use & Reliability

Over the subsequent months, I used the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 extensively in various field conditions, from arid desert washes to cold mountain streams. The paper consistently delivered reliable filtration, removing even very fine particles that would otherwise interfere with downstream analyses. It’s worth noting that while designed for lab use, careful storage in a sealed bag kept the paper clean and dry in my pack.

After several weeks of use, there were no signs of degradation or reduced performance. The paper remained strong and resistant to tearing. Maintenance was minimal: simply discarding the used filter paper and cleaning the filtration apparatus. Compared to my previous experiences with less-specialized filters, the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 provided significantly more consistent results and required less frequent replacement.

Breaking Down the Features of VWR Grade No. 494 Filter Paper, Quantitative 28297-930

Specifications

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 is characterized by several key specifications:

• High Alpha-Cellulose Content: This ensures minimal background interference in analytical procedures.
• Fine Pore Size: Specifically designed for retaining very fine precipitates, such as barium sulfate or lead sulfate.
• Acid-Washed: This process removes trace metals and other contaminants, guaranteeing the purity of the filtrate.
• Quantitative Grade: Meaning the ash content is extremely low, making it suitable for gravimetric analysis where the weight of the residue is crucial.
• 28297-930: This is the VWR catalog number for easy reordering.

These specifications are critical because they directly impact the accuracy and reliability of any subsequent analysis performed on the filtered sample. The low ash content, in particular, is essential for quantitative work.

Performance & Functionality

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 performs its primary function – separating solids from liquids – exceptionally well. Its ability to retain very fine particles is a significant advantage, resulting in a cleaner filtrate. Its strength when wet is also noticeable, preventing tearing during filtration.

A slight weakness is its relatively slow filtration rate compared to larger-pore filter papers, which can be a consideration when dealing with large volumes of liquid. However, this is a trade-off for its superior retention capabilities. Overall, it meets and exceeds expectations for its intended use.

Design & Ergonomics

The design is straightforward: a circular piece of filter paper. However, the quality of the materials and manufacturing is evident in its uniform texture and consistent pore size. The paper is easy to handle and fold for use in a filtration apparatus.

There is virtually no learning curve involved. Anyone familiar with basic filtration techniques can use this paper effectively. The simple design of the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 is its strength.

Durability & Maintenance

The durability of the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 is high, as long as it’s stored properly and not subjected to extreme physical stress. Once wet, it maintains its structural integrity well. Maintenance is non-existent: it’s a single-use item designed to be discarded after filtration.

Accessories and Customization Options

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 doesn’t come with any specific accessories, as it’s intended to be used with standard laboratory filtration equipment such as funnels, beakers, and filtration flasks. Customization is limited to cutting the paper into different shapes or sizes, depending on the specific application. It is highly compatible with standard lab equipment, regardless of brand.

Pros and Cons of VWR Grade No. 494 Filter Paper, Quantitative 28297-930

Who Should Buy VWR Grade No. 494 Filter Paper, Quantitative 28297-930?

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 is perfect for:

• Researchers and scientists conducting quantitative analysis.
• Environmental scientists needing to filter water or soil samples for trace element analysis.
• Preppers or survivalists who want a reliable method for purifying water in emergency situations.
• Hobbyists involved in chemistry or other scientific pursuits requiring precise filtration.

Those who should skip this product:

• Anyone needing rapid filtration of large volumes where high precision isn’t required.
• Individuals only needing basic water filtration for removing larger debris (leaves, twigs, etc.).

Must-have accessories or modifications:

• Appropriate funnel and collection flask or beaker.
• Storage container to protect the paper from moisture and contamination.

Conclusion on VWR Grade No. 494 Filter Paper, Quantitative 28297-930

The VWR Grade No. 494 Filter Paper, Quantitative 28297-930 is a specialized tool that excels in its specific application: precise filtration of very fine particles for quantitative analysis. While it may not be the most glamorous piece of gear, its reliability and accuracy make it invaluable for anyone needing dependable filtration in the field or lab. The price of $49.99 is justified given its performance and the peace of mind it offers when accurate results are paramount.

I would personally recommend the VWR Grade No. 494 Filter Paper, Quantitative 28297-930 to anyone who demands a high degree of accuracy in their filtration processes. If you’re tired of inconsistent results and unreliable filters, give this paper a try – you won’t be disappointed. Add it to your cart and ensure precision in your next project!