Qualitative Filter Papers: 马来西亚的首选 SCIENCEGATES SDN BHD

详情

Qualitative Filter Papers

100% cotton linter cellulose
pH tolerant: 0 to 12
Thermostable: up to 120°C
Wide selection – seven types
Ash Content: 0.1%

APPLICATIONS

Clarify and remove precipitates
Preparation for qualitative analysis

CHARACTERISTICS AND APPLICATIONS: CONVERSIONS – QUALITATIVE PAPERS

Grade	Comments	Weight (g/m2)	Thickness (mm)	*Flow Time1 (sec)**	*Absorption speed2 (cm)**	*Wet Strength3 (kPa)**	Nominal Rating (µm)	Collection Efficiency (%, 0.3 µm DOP)	*Conversion4**
Grade	Comments	Weight (g/m2)	Thickness (mm)	*Flow Time1 (sec)**	*Absorption speed2 (cm)**	*Wet Strength3 (kPa)**	Nominal Rating (µm)	Collection Efficiency (%, 0.3 µm DOP)	Whatman	ex-Schleicher & Schuell
No. 1	Retains large crystalline particles and gelatinous precipitates. Fast flow rate, smooth surface, normal hardness	90	0.20	45	9.0	7	6 (Coarse)	65	4	410 or 1450cv
No. 2	Retains medium crystalline precipitates, fast flow rate, smooth surface, normal hardness	125	0.26	80	8.0	8	5 (Medium)	80	-	604
No. 231	Retains crystalline precipitates, moderate flow rate, smooth surface, normal hardness	95	0.18	130	7.5	-	(Medium)	-	2	-
No. 232	Retains medium to medium- fine particulates, slow flow rate, smooth, normal hardness	90	0.18	250	5.0	-	(Med./ Med.-Fine)	-	6	-
No. 131	High retention efficiency for fine crystalline precipitates like barium sulfate, slow flow rate, smooth surface, normal hardness	140	0.25	240	6.0	8	3 (Med.-Fine)	90	3	597
No. 235	Highest retention efficiency, retains very fine particulates, very slow flow rate, smooth	95	0.17	1,200	4.0	-	(Very Fine)	-	5	-
No. 101	Seed germination, retains large particles	80	0.21	50	8.0	34	5 (Coarse and gelatinous)	-	91	-

*1. Flow time is the time in seconds required to filter 100 mL of distilled water at 20°C under pressure supplied by a 10 cm water column through a 10 cm2 section of filter paper.
*2. Absorption speed is the distance in cm that water will travel in an upright strip of filter paper in ten (10) minutes at 20°C.
*3. Wet strength is the pressure measured by Mullen Burst Strength Tester after soaking in water.
*4. Conversions between manufacturers are not absolute. Use these conversions as a guideline.

ORDERING INFORMATION: QUALITATIVE PAPERS

• Available in discs in the following diameters (mm): 55, 70, 90, 110, 125, 150, 185, 240, 285, 300, 330, 360, 400, 500, 600
• Additional sizes available upon request.
• Order by specifying first the grade of filter then the diameter, e.g. (No.1, 125 mm), (No.232, 55 mm)
• Package of 100

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