SKU: 71824975907

Cytiva Whatman™ Qualitative Filter Paper: Grade 1 Circles

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Description

Cytiva Whatman™ Qualitative Filter Paper: Grade 1 CirclesWhatman Qualitative Filter Paper: Grade 1 Circles The most widely used filter paper for routine applications with medium retention and flow rate. This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate. In agriculture, it is used for soil analysis and

Whatman Qualitative Filter Paper: Grade 1 Circles

The most widely used filter paper for routine applications with medium retention and flow rate. This grade covers a wide range of laboratory applications and is frequently used for clarifying liquids. Traditionally the grade is used in qualitative analytical separations for precipitates such as lead sulfate, calcium oxalate (hot), and calcium carbonate.

In agriculture, it is used for soil analysis and seed testing procedures. In the food industry, Grade 1 is used for numerous routine techniques to separate solid foodstuffs from associated liquid or extracting liquid and is widely used in education for teaching simple qualitative analytical separations.

In air pollution monitoring, using circles or rolls, atmospheric dust is collected from airflow and the stain-intensity measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and color formation quantified by optical reflectance.

Sold in Packs of 100 Filters 

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SKU: 71824975907

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4.1 ★★★★★
Based on 25 reviews
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D
Verified Purchase
DCB
Charlottesville, US
★★★★★ 5
Valet Tray
Size: 8.5" x 5.8" x 1.9", Color: Black
Perfect!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
J
Verified Purchase
Joseph Klobuchar
Draper, US
★★★★★ 5
Just lovely
Size: 8.5" x 5.8" x 1.9", Color: Orange
Purchased this several months ago and liked it, but I had received so many complements on this tray since then I had to submit this review. The tray is sturdy and put together well, and the size is exactly what was given before purchase.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
K
Verified Purchase
Kevin
Boise, US
★★★★★ 5
Nice and Elegant.
Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Glided), Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Glided)
Color looks great, material is good quality and fits most of my items. It makes my items look neat and organized. Price is a bit high but worth it in my opinion.
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Reviewed in the United States on January 22, 2026
L
Verified Purchase
Lana T
Grantham, US
★★★★★ 5
Quite nice and very functional
Size: 7.7" x 7.7" x 1.7", Color: Grey (Metal Silvered), Size: 7.7" x 7.7" x 1.7", Color: Grey (Metal Silvered)
Elegant and substantial - this valet catch all for your night stand or dresser is quite nice and very sophisticated. Sleek and soft brushed suede like material. It was packed well, and is quite nice to keep miscellaneous items corralled together. I’m very pleased and would recommend.
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Reviewed in the United States on February 15, 2025
C
Verified Purchase
Cali Mom
San Leandro, US
★★★★★ 5
Perfect size, high quality
Size: 7.7" x 7.7" x 1.7", Color: Black (Metal Silvered)
I had a previous catch all tray that I bought on amazon, it used buttons on the 4 corners to turn a flat cardboard into a tray. Over time, the catch all tray got filled up, not just with a wallet, keys and eyeglasses but eventually business cards and other knick knacks. With all the items inside the tray, sometimes the buttons would start to pop out. It wasn't awful, more of an annoyance. But it was time for me to find a more durable tray. I looked on amazon and added 6 different trays that had "potential" into my shopping cart. Then I carefully evaluated each one and deleted them out of my cart until there was only one left. Some had multiple compartments. Some were larger than this one. I felt the ones with compartments would limit my ability to put the things I want in there. Also, I didn't want it so big that it took up too much desk space. Ultimately, I felt this was the perfect size. I'm extremely happy with it, the quality is really nice and it looks and feels durable. No more loose buttons and spilled knick knacks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 14, 2024

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