13 best qualitative lab filter paper
Qualitative lab filter paper is a type of specialized paper used in laboratories for various filtration processes. It is related to lab filters, filtration, and industrial scientific applications. Here's what you need to know about qualitative lab filter paper:
Filtration Purpose: Qualitative filter paper is primarily used for qualitative analysis in laboratory settings. It is not designed for precise quantitative measurements but is suitable for separating solids from liquids or gases.
Composition: Qualitative filter paper is typically made from cellulose fibers, such as cotton or wood pulp. Some variations may include added materials to enhance specific properties like wet strength or porosity.
Pore Size: Qualitative filter papers come in various pore sizes, which determine the particle size they can effectively capture. These sizes range from coarse to fine, allowing for filtration of a wide range of substances.
Thickness and Weight: Filter paper can vary in thickness and weight, depending on the intended application. Thicker papers are often used for filtering larger volumes or more substantial particulate matter.
Grades: Filter papers are available in different grades based on their filtration speed and retention capacity. Common grades include fast, medium, and slow flow rates, each suitable for specific applications.
Application: Qualitative lab filter paper is used in a variety of laboratory procedures, including gravity filtration, vacuum filtration, and filtration of precipitates or particulate matter from liquids or gases.
Chemical Compatibility: The choice of filter paper should consider its compatibility with the chemicals and solvents involved in the filtration process. Some filter papers are chemically treated to improve resistance to aggressive chemicals.
Sterility: In certain scientific and medical applications, sterile filter paper may be required to maintain aseptic conditions.
Disposable: Qualitative filter paper is generally considered disposable after use, as it may become clogged or contaminated during the filtration process.
Quality Control: Manufacturers of filter paper adhere to quality control standards to ensure consistency in pore size, thickness, and other properties, allowing for reliable and reproducible filtration results.
Availability: Qualitative lab filter paper is readily available from laboratory supply companies and comes in various shapes and sizes, including sheets, discs, or rolls.
In summary, qualitative lab filter paper is a crucial tool in laboratory filtration processes, used for separating solids from liquids or gases based on pore size, thickness, and other properties.It is commonly employed in a wide range of scientific and industrial applications to isolate and analyze substances effectively.
Below you can find our editor's choice of the best qualitative lab filter paper on the market
7 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 70 mm (100 Discs)
Fluted Filter
Product description
GRADE 4 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 4, this very fast laboratory filter paper is used for coarse filtration when you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.
APPLICATIONS
- science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs
- food : Determination Sodium Chloride in foodstuffs
- wine : Filtration of musts
- metalurgy : Determination of silicon impurities in pig iron and steel
- environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.
COARSE RETENTION
Retains coarse particles and gelatinous precipitates like:
- Metal hydroxides (Al, Cr, Fe, Mg) , Be Oxide
- Insoluble iron and ore, precipitated Silicates
- Culture media, and colloidal sediments
SPECS
- paper : pure cotton cellulose
- flow : fast
- retention : 20~25 μm (coarse)
- speed : 15~20 s (10ml DIN 53137)
- size : ⌀ 70 mm
- thickness : 140 μm
- weight : 86 g/m²
- ash : 0.1%
- qty : 100 discs
PLAIN-DISCS
Those Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.
The same affordable filters are also available funnel-ready as ST004-70q (folding) or ST004-70v (pleating).
EQUIVALENCE & SIZE
See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
- GRADE 4 : 7cm - Equivalent to Whatman qualitative grade 4, standard lab filter paper (70mm)
- FAST PRE-FILTER - Quickly clean-up biological samples and organic extracts, routine clarification
- WINE MAKING - Filtration of musts
- HIGH AIR FLOW COLLECTION - Collect large particulate in fast moving air or fumes
- COARSE RETENTION / FAST FLOW - Retains coarse and gelatinous precipitates (20~25 micron)
User questions & answers
| Question: | Would this be the correct filtration level to remove waxes only, from winterized cannabis oil/ethenal |
| Answer: | Not expert in this process but from literature, you would want to start with grade 4 as a pre-filter to remove the bulk of the wax. Then grade 1 and eventually grade 2 to eliminate the smallest traces. For an example of what grade 1 would remove, have a look at Tony3 review of this grade. To expand a bit as this is a growing usage of our filters: The wax filtration is slow so you better use vac filtration with a filter as large as possible. Using gravity filtration would work but will take forever. As previously mentioned best start with coarse filtration (grade 4) and increase retention (grade 1 then 2) this will also improve speed. If you plan to buy the 3 grades, we have a cost effective bundle for most sizes, search for "zenpore bundle". |
UPlama 200PCS Qualitative Filter Paper Circles,Lab Supply Ashless Quantitative Filter Paper,94mm Diameter Cellulose Filter Paper with 20 Micron Particle Retention Medium Filtration Speed
UPlama
Product description
Package Includes: 200PCS Qualitative Filter Paper Circles
Filter paper diameter: 94mm
Filtration Speed: 35 – 70 sec
Ash content: ≤0.15%
science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs
food : Determination Sodium Chloride in foodstuffs
wine : Filtration of musts
metalurgy : Determination of silicon impurities in pig iron and steel
environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.
- Filter paper diameter: 94mm
- Has the maximum degree of fine particle filtration (2.5μm) in the qualitative range; capable of retaining the fine precipitates encountered in chemical analysis
- Collect large particulate in fast moving air or fumes
- Filtration Speed: 35 – 70 sec, Ash content: ≤0.15%
- Compatible with StonyLab Buchner Filtering Funnel - 500ml
100 Chromatography Paper Strips - Highest Quality Grade 1 Filter Paper - For Pigment Separation and Science Experiment For Chemistry, Laboratories, Classroom, School, University, Student, Kids 6x.75''
LOSTRONAUT
Product description
✔ Compared to similar quality filter paper for chemistry available our 100-strip pack is the best value on the market allowing you to conduct many experiments, with the highest quality materials.
Features of our chromatography paper strips include:
- 100 strips per pack (great value)
- size of strip: 6 x .75 inches
- grade-1
- thickness .172 mm
- particle retention 11 um
- super easy to interpret readings - crisp separation of pigments
- perfect for lab, study or home use - product guarantee and warranty
✔ Chromotography kit great for students, kids, adults, laboratories, science experiments, paper extraction, qualitative filter paper, separation, etc.
✔ For a product that costs less than $10 and includes 100-strips, you can't beat this high-quality unique LOSTROANUT product.
- 100 Grade-1 chromatography paper strips for the best value and ability to conduct many experiments
- Size: 6 inches x .75 inch blotting paper perfect size for easy separation experiments and learning
- Crisp separation & easy to interpret readings (commonly used to separate mixtures of colored inks)
- Details: Chemistry paper has medium/fast Filtration speed, .17mm thickness, particle retention 11 um
- Satisfaction guarantee: our products are top quality & come with a 30-day money-back guarantee
11 cm Lab Filter Paper, Standard Qualitative Grade 1 - ZENPORE Medium Flow 110 mm (100 Discs)
Fluted Filter
Product description
GRADE 1 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 1, this laboratory filter paper is commonly used in labs where you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.
APPLICATIONS
- science : Routine qualitative analytical separations and liquid clarification in labs
- food : Solid foodstuffs separation and liquid extraction, fat content determination
- beverage : Analysis and filtration of dense liquids like fruit pulps, musts, syrups, oil or plant extracts
- agriculture : Soil analysis and seed testing
- environment : Medium particles collection for pollution monitoring (stain intensity)
- education : Basic qualitative separations teaching and paper chromatography
MEDIUM RETENTION
Retains medium-fine crystalline precipitates like:
- Sulfates (Pb, coarse form of Ba and Ca)
- Carbonates (Ba, Ca)
- Phosphates (Al, Pb, Struvite)
- Chromates (Fe, As, Pb)
- Ca Oxalate (hot), Pb Oxide
SPECS
- paper : pure cotton cellulose
- flow : medium
- retention : 10~15 μm (medium)
- speed : 30~35 s (10ml DIN 53137)
- diam : 110 mm
- thickness : 150 μm
- weight : 86 g/m²
- ash : 0.1%
- qty : 100 discs
PLAIN-DISCS
Those Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.
The same affordable filters are also available funnel-ready as ST001-110q (folding) or ST001-110v (pleating).
EQUIVALENCE & SIZE
See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
- GRADE 1 : 11cm - Equivalent to Whatman qualitative grade 1, standard lab filter paper (110mm)
- LAB FILTER - Routinely used in lab to determine fat content, extract solids and clarify liquids
- CHEMISTRY CLASS - Filter paper can teach basic qualitative separations and paper chromatography
- AIR FILTRATION - Collect medium particles for pollution monitoring
- MEDIUM RETENTION / MEDIUM FLOW - Retains medium crystalline particles (10~15 micron)
9 cm Lab Filter Paper, Standard Qualitative Grade 2 - ZENPORE Slow Flow 90 mm (100 Discs)
Fluted Filter
Product description
GRADE 2 STANDARD Qualitative Filter Paper
Equivalent to Whatman grade 2, this laboratory filter paper is widely used for standard fine filtration when you need to separate a solid or precipitate from the filtrate.
Made from high alpha-cellulose cotton, this standard lab filter is not intended for ashing.
APPLICATIONS
- science : General filtration in the 8 ?m range, clarification of cloudy suspension in labs
- food : Determination of total fat content in foodstuff and dairy, unsaponifiable fraction in fats and oils (fluted)
- beverage : Beer and malt analysis, removal of turbidity from wort and removal of yeast after fermentation (fluted)
- agriculture : Prefiltration of soil, hold nutrient in plant growth trials
- environment : Air polution monitoring of specific atmospheric contaminants and black smoke
HIGH RETENTION
Retains fine crystalline and organic precipitates around 8μm like:
- Metal Sulfides (Cd, Ni, Zn, Fe, Pb, Mn, Ag, As)
- Ba Sulfate, Pb Chromate, Mg oxide
- Ca Oxalate (cold), Ca Fluoride, Pb Dioxide
SPECS
- paper : pure cotton cellulose
- flow : slow
- retention : 5~10 μm (fine)
- speed : 40~45 s (10ml DIN 53137)
- size : ⌀ 90 mm
- thickness : 160 μm
- weight : 86 g/m²
- ash : 0.1%
- qty : 100 discs
PLAIN-DISCS
Those Flat Discs are suitable for gravity and Buchner low suction vacuum filtration.
The same affordable filters are also available funnel-ready as ST002-90q (folding) or ST002-90v (pleating).
EQUIVALENCE & SIZE
See the cross-reference table and size diagrams in the photos to choose the appropriate reference and diameter of your circles.
- GRADE 2 : 9cm - Equivalent to Whatman qualitative grade 2, standard lab filter paper (90mm)
- AGRICULTURE - Soil pre-filtration, fertilizer analysis, nutrient absorption in seed tests
- BREWING TESTS - Beer and malt analysis, removal of turbidity in wort and yeast filtration
- AIR / GAS FILTRATION - Pollution monitoring of specific atmospheric contaminants, smoke
- HIGH RETENTION / SLOW FLOW - Retains fine crystalline particles (5~10 micron)
User questions & answers
| Question: | Are these filter papers very absorbent when it comes to small droplets of water? I want to cut in strips to get at small droplets of water in sensors |
| Answer: | Filter paper is more absorbent than normal paper, but it's not bloating paper. Depending on your needs it might work or not. I would need more details to answer better. I would suggest you buy the smallest size of grade 4 (fast) and test it. |
| Question: | Would this be the correct filtration level to remove waxes only, from winterized cannabis oil/ethenal |
| Answer: | Not expert in this process but from literature, you would want to start with grade 4 as a pre-filter to remove the bulk of the wax. Then grade 1 and eventually grade 2 to eliminate the smallest traces. For an example of what grade 1 would remove, have a look at Tony3 review of this grade. To expand a bit as this is a growing usage of our filters: The wax filtration is slow so you better use vac filtration with a filter as large as possible. Using gravity filtration would work but will take forever. As previously mentioned best start with coarse filtration (grade 4) and increase retention (grade 1 then 2) this will also improve speed. If you plan to buy the 3 grades, we have a cost effective bundle for most sizes, search for "zenpore bundle". |
Eisco Labs Premium Qualitative Filter Paper, 9cm Dia, Medium Speed (85 GSM), 10μ (10 Micron) Pore Size - Pack of 100
EISCO
Product description
Premium quality filter paper for use in labs.
User questions & answers
| Question: | would these tolerate chlorinated solvents |
| Answer: | I haven't used them with anything chlorinated, but I don't see why they wouldn't. I've used similar filters with chloroform in the past... |
| Question: | can these be used for food products |
| Answer: | Yes |
Filter Paper, Qualitative, Grade 1, 240 mm (Diameter) Pack of 100 Sheets
Supertek Scientific
Product description
Filter Paper, Qualitative, Grade 1, 240 mm Pack of 100 sheets. Supertek Qualitative filter papers are made from virgin cellulose fiber. Grade 1 filter papers are suitable for medium flow rate and medium retention applications. Grade 1 filter papers are the most widely used in general laboratory use. They are frequently used to purify or clarify liquids. They are frequently used to separate precipitates or sediment from liquid for further analysis. Supertek Grade 1 Filter Paper will retain particles down to 9 nanometers in size. Very useful in waste water treatment, soil analysis or seed testing, education and in the commercial food industry,
- Virgin Cellulose Fibers
- 9 nanometers retention
- Filtration
- Qualitative Filter Paper
- Medium flow rate
Whatman 1001-055 Whatman 1001-055 Qualitative Filter Papers; 5.5 cm Diameter; Pore Size, 11µ (Pack of 100)
Whatman
Product description
Our Whatman filter papers offer you flexibility in filter choice without sacrificing quality. All filters are packaged 100 per box. Qualitative filter papers are used for liquid clarifications, analytical separations, or air and water analysis. The industry standard for high-purity filtration available in a variety of grades and sizes.
StonyLab Qualitative Filter Paper Circles, 75mm Diameter Cellulose Filter Paper with 20 Micron Particle Retention Medium Filtration Speed, Pack of 100
StonyLab Scientific
Product description
SKU: XL-815481
Description
Coarse cellulose filter papers remove particles > 20 µm.
Filtration Speed: 35 – 70 sec.
Ash content: ≤0.15%.
StonyLab ensures high quality products and premium customer service. If received damaged, please contact us immediately. We will solve it until satisfied
- Filter paper diameter: 75mm
- Coarse cellulose filter papers remove particles > 20 µm
- Filtration Speed: 35 - 70 sec
- Ash content: ≤0.15%
- Compatible with StonyLab Porcelain Buchner Funnel 80mm
User questions & answers
| Question: | What is the temperature range they will work with and which solvents are compatible |
| Answer: | Dear Customer, The filter paper can withstand temperatures up to 120℃ under no fire source. It can also be used on strong acids and alkalis but will gradually decompose after being soaked in liquid for a week. Thanks, Lizzy L |
| Question: | Are these food safe |
| Answer: | Dear Customer, The item is for laboratory use only. Thanks, Lizzy L. |
| Question: | Do you offer a filter paper to fit a 94 mm buchner that is a smaller micron than |
| Answer: | Dear Customer, Sorry, we currently only have filter papers that feature 20 Micron. Thanks, Lizzy L |
Whatman - 1001150-100 4712B40PK 1001150 Grade 1 Qualitative Filter Paper, 150 mm Thick and Max Volume 571 ml/m (Pack of 100)
Whatman
Product description
Clarifies liquids in routine laboratory applications and for air pollution monitoring. Used in air monitors to collect atmospheric dust for assessment of stain intensity. Also available in 46 x 57 cm sheets.
Whatman 1001-125 Qualitative Filter Paper Circles, 11 Micron, 10.5 s/100mL/sq inch Flow Rate, Grade 1, 125mm Diameter (Pack of 100)
Whatman
Product description
This Whatman 12.5cm, grade 1, cellulose filter paper is the most widely used filter paper for routine applications with medium retention (11µm) and flow rate. Traditionally, this 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. It is also used for numerous routine techniques in the food industry 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 is measured photometrically. For gas detection, the paper is impregnated with a chromogenic reagent and color formation is quantified by optical reflectance. Retention: 11µm. Diameter: 12.5cm. 100/Pack. Whatman #: 1001-125.
- 12.5cm
- Grade 1
- Covers a wide range of laboratory applications; frequently used for clarifying liquids
- Areas of use include the food industry, agriculture, air pollution monitoring, and gas detection
- Widely used in education for teaching simple qualitative analytical separations
User questions & answers
| Question: | Are these ashless |
| Answer: | Good Morning, These papers are Grade 1 and are not considered ash less. |
| Question: | Will this be acceptable for fine particles |
| Answer: | This filter paper is designed to remove particles 11 microns and larger from the liquid sample you are filtering. If your sample contains particles finer than 11 microns you can use a Millipore filter to remove them. However, Millipore filters require a special filter funnel and must be run using suction, so the overall cost would be high. I suggest you go on the Whatman website and find the Whatman filter paper with the smallest micron rating you can find and see if it can remove the solids from your sample. |
| Question: | Are the filters absolute or nominal |
| Answer: | These filters are nominal with particle retention rating at 98% efficiency. |
| Question: | What Is It Made Of |
| Answer: | According to our manufacturer, 98% Cellulose. |
Eisco Labs Qualitative Filter Paper, 15cm, Pack of 100
EISCO
Product description
EISCO Qualitative Filter Paper, 15cm, Pack of 100
(100) Circles
Student quality filter paper for use in schools or home. Pack of 100 circles.
User questions & answers
| Question: | If this is 15 cm why does it have 4.5 inches |
| Answer: | The 4.5" listed in product dimensions is incorrect. |
| Question: | What is the pore size of this filter paper |
| Answer: | 8-10 Microns |
UPlama 200PCS Qualitative Filter Paper Circles,Lab Supply Ashless Quantitative Filter Paper,15cm Diameter Cellulose Filter Paper with 20 Micron Particle Retention Medium Filtration Speed
UPlama
Product description
Package Includes: 200PCS Qualitative Filter Paper Circles
Filter paper diameter: 15cm
Filtration Speed: 35 – 70 sec
Ash content: ≤0.15%
science : Routine clean-up of insoluble liquids such as biological fluids or organic extracts in labs
food : Determination Sodium Chloride in foodstuffs
wine : Filtration of musts
metalurgy : Determination of silicon impurities in pig iron and steel
environment : Fast flowing air and exhausts monitoring when the collection of fine particles is not critical.
- Filter paper diameter: 15cm
- Has the maximum degree of fine particle filtration (2.5μm) in the qualitative range; capable of retaining the fine precipitates encountered in chemical analysis
- Collect large particulate in fast moving air or fumes
- Filtration Speed: 35 – 70 sec, Ash content: ≤0.15%
- Compatible with StonyLab Buchner Filtering Funnel - 500ml
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