Standard Grades

• Merlin Scientific Qualitative filter papers are manufactured from high-quality cotton linters, ensuring quality, re-producibility and uniformity. With average 0.1% ash content. Qualitative filter papers are used for analytical and routine analyses, when no gravimetric analyses are required. A wide range of retention/flow rate combinations matches numerous laboratory applications.The filter paper approved by certificate of CE.

Features

• * Supply in Slow, Medium and Fast flow rate
• * 55, 70, 90, 110, 125, 150, 180, 185, 240, 320,400mm diameter or OEM size in available
• * Ideal for analytical and routine analyses

Grade Comparison

Merlin Scientific	BIO-1	BIO-2	BIO-4	BIO-5	BIO-6
Whatman	Grade 1	Grade 2	Grade 4	Grade 5	Grade 6
Advantec	2	232	1	235	131
Munktell	No.1/1F	No.2/150	1288/3	293/120H	1290/1001
Ahlstrom	601	642	631	610	950
Macherey Nagel	616	616md	1670	619eh	619eh

 

Technical Data

Grade	Particle Retention	Product Appearance	Filtration Speed	Ash Content (%)	Basis Weight (g/m2)	Wet Burst (mm H2O)
BIO-1	11μm	Smooth	Medium	<0.1	84	>140
BIO-2	8μm	Smooth	Medium	<0.1	84	>140
BIO-4	20μm	Smooth	Fast	<0.1	84	>120
BIO-5	2.5μm	Smooth	Slow	<0.1	84	>180
BIO-6	3.0μm	Smooth	Slow	<0.1	84	>180

 

Applications

• Qualitative filter paper covers a wide range of laboratory applications and frequently used for clarifying liquids.
• Soil analysis and seed testing procedures in agriculture
• Separate solid foodstuffs from associated liquid or extracting liquid in food industry
• Widely used in education for teaching simple qualitative analytical separations
• Use circles collect atmospheric dust from air flow in air pollution monitoring

  

Wet Strengthened Grades

Wet-strengthened filter papers are mainly used in normal liquid clarification when filtration is performed under pressure or vacuum and a standard filter is easy to break. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Their use in normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do, however, contain nitrogen so these grades should not be used in applications such as Kjeldahl estimations.

Features

* Widely used to assay sucrose in cane sugar and within pharmaceutical laboratories.

* Full range of diameter: 55, 70, 90, 110, 125, 150, 180, 185, 240,320 and 400mm

* Available from medium and fast flow rate

* Don’t recommend in applications of Kjeldahl estimations.

 

Grade Comparison

Merlin Scientific	BIO-91	BIO-113
Whatman	Grade 91	Grade 113
Advantec	n/a	n/a
Munktell	55/N	6 S/N
Ahlstrom	615	n/a
Macherey Nagel	n/a	n/a

 

Technical Data

Grade	Separating Property	Filtration Seconds	Filtration Speed	Ash Content (%)	Pore Size	Basis Weight (g/m2)	Wet Burst (mm H2O)
BIO-91	PbSO4	>35--<70	Medium	<0.13	10μm	84	>=320
BIO-113	Fe(OH)3	<35s	Fast	<0.13	30μm	68	>=320

 

Quantitative Filter Paper- Ashless Grades (Ash <0.007%)

Merlin Scientific Scientific ashless filter papers are particularly suited for quantitative routine analysis. The ashless quantitative filter paper is made from pure alpha cotton cellulose and double acid washed then rinsed with ultra-pure water to neutralize and good for gravimetric analysis and preparation of samples for instrumental analysis. These filter papers are manufactured under intense quality control standards to be of the highest quality and consistency, ensuring uniform performance so that you can be confident with your results which are as accurate as can be.

 

Features

* Ashless - extremely low ash content <0.007%

* Full range of diameter: 55, 70, 90, 110, 125, 150, 180, 185, 240, 320, 400mm

* Available from slow, medium, fast flow rate

* Good for gravimetric analysis and preparation of samples for instrumental analysis.

 

Grade Comparison

Merlin Scientific	BIO-40	BIO-41	BIO-42	BIO-43	BIO-44
Whatman	Grade 40	Grade 41	Grade 42	Grade 43	Grade 44
Advantec	No. 5B	7	5C	-	6/4A
Munktell	390	00M/389	393/00H	392/00A	391
Ahlstrom	74	-	94	75	95
Macherey Nagel	640d	640m	640de	640md	640de

 

Technical Data

Grade	Particle Retention	Product Appearance	Filtration Speed	Ash Content (%)	Basis Weight (g/m2)	Wet Burst (mm H2O)
BIO-40	8.0μm	Smooth	Medium	<0.007	84	>140
BIO-41	20-25μm	Smooth	Fast	<0.007	84	>120
BIO-42	2.5μm	Smooth	Slow	<0.007	84	>180
BIO-43	16μm	Smooth	Medium to Fast	<0.007	84	>140
BIO-44	3μm	Smooth	Slow	<0.007	84	>180

Applications

Quantitative filter paper is suitable for a wide range of critical gravimetric analytical filtration procedures.

- Soil analysis, when separating solid matter from aqueous extracts

- Quantitative determination of milk sediment

- Analysis of constituent components in cements, clays, iron, and steel products

- Inorganic analysis in the construction, mining, and steel industries

- Particle collection for air pollution monitoring for subsequent analysis by X-Ray fluorescence (XRF) techniques