7 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 70 mm...

Description

Brand New 7 cm Lab Filter Paper, Standard Qualitative Grade 4 - ZENPORE Fast Flow 70 mm (100 Discs)
Manufacturer model:
ST004-70
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)
Description
Size:
7 cm diameter
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.
Shipping and Handling
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Return Policy
All our products are brand new and sealed. All items qualify for returns within 30 days of receipt.
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