Laboratory Product Catalogue Total Laboratory Science Support

Filter Papers Filtration
Extraction thimbles
Extraction thimbles are used for quantification
of single components in food products,
plastic materials, pesticides, dust or air.
Sartorius extraction thimbles have an
excellent reputation for purity and consistent
high quality. The standard grades are manufactured
from high-alpha cellulose cotton
linters to give a high purity thimble which
is mechanically strong and has excellent
retention.
Glass and quartz microfiber filters
Glass microfiber filters are made of 100%
borosilicate. No binders are used in their
production, which makes them ideal for
critical analyses that preclude the use of
filters that release impurities. They continue
to perform efficiently for long periods, unlike
cellulosic filters whose rate of filtration drops
off rapidly as they become increasingly
loaded with particles. Glass microfiber filters
are temperature resistant up to 500°C.
Quartz microfiber filters have properties
that are similar to those of glass microfiber
filters. However, quartz microfiber filters are
resistant to even higher temperatures up
to 900–950°C, have only minimal traces of
metal impurities, feature excellent weight
and dimensional stability, and can be used for
analysis of hot, acidic gases (except for HF),
particularly for emission testing procedures.
Glass and quartz microfiber filters are suitable
for measurement and analysis of air and
water pollutants, use as general-purpose
membrane prefilters, and for clarification of
buffer and reagent solutions, especially in
spectrophotometry. The filters are available
as disks, sheets or thimbles.
Various densities and thickness of the
materials define the specific filtration
characteristics of each of the following
grades:
MGA, MGB, MGC, MGD, MGF, 40, T293
Blotting and chromatography papers
These filter products are made of highpurity
cotton linters with an alpha-cellulose
content of over 97%. We offer these papers
in 16 grades, which differ in basis weight
and travel velocity. You can choose from
eleven grades with normal ash content and
eight grades with reduced ash content.
Chromatography papers with normal ash
content are grades FN 1 through FN 8, FN 30,
and FN 100; papers with reduced ash content,
FN 11 through FN 18. The long side is the
direction of travel of the substances being
tested. These papers can also be supplied as
round filters for circular technology, as strips,
or as sheets for special techniques.
Beyond these formats, we also offer papers
for buffer wicking and transport or for
covering the gel and the transfer membrane
on both sides in a blotting tank to accommodate
various transfer blotting techniques.
BF 1, BF 2, BF 3, BF 4 and FN 100
are for use as blotting or chromatography
papers.
Indicator papers
Sartorius offers a comprehensive assortment
of ready-to-use pH and indicator papers
as reels or strips. These are used for quick
and exact determination of colored, turbid,
clear or aqueous solutions within the
entire pH range.
Moreover, we offer ultrapure papers specially
designed to be coating with pH indicators or
other test reagents. In addition, we supply
reels and sheet formats customized to meet
your specifications.
Special brochure available on request.
Order no. S--1502-e
118