Whatman |
| 色層分析產品(Chromatography) |
3MM
Chr
Though widely used as a blotting
paper, 3MM Chr is used in both
electrophoresis and for general
chemistry. A medium thickness
paper (0.34 mm) used extensively
for general chromatography and
electrophoresis. Flow rate is
130 mm/30 min. |
17
Chr
A thick (0.92 mm) and highly absorbent
paper with a very high flow rate
of 190 mm/30 min. Suitable for
the heaviest loadings and ideal
for preparative paper chromatography
and electrophoresis. |
20
Chr
Thickness 0.17 mm. Flow rate 85
mm/30 min. For maximum resolution,
this grade is supreme, giving
the greatest possible separation
of closely related compounds.
Smooth surface. Recommended for
separation of samples of unknown
composition, with outstanding
resolution at low loadings. |
31ET
Chr
Thickness 0.50 mm. Flow rate 225
mm/30 min. Extremely fast. Flow
rate is the highest of all chromatography
papers in the Whatman range. Thick
paper with fairly soft surface.
Principal application is in electrophoresis
of large molecules. |
1
Chr
The world standard chromatography
paper. A smooth surface, 0.18
mm thick with a linear flow rate
(water) of 130 mm/30 min. Good
resolution for general analytical
separations. |
2
Chr
Thickness 0.18 mm. Flow rate 115
mm/30 min. Slower than 1 Chr for
higher resolution applications.
Smooth surface. Particularly recommended
for optical or radiometric scanning.
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3
Chr
A medium thickness paper (0.36
mm) with a flow rate of 130 mm/30
min. For general applications
with medium/heavy solute loadings.
Frequently used for separation
of inorganic compounds and for
electrophoresis. |
2668
Chr
Thickness 0.33mm. Flow rate 155mm/10
min. For separation of relatively
large molecules by electrophoresis.
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2727
Chr
Thickness 1.40mm. Flow rate 180mm/30min.
For separation of very large amounts
of substance. |
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| 萃取產品
(extraction products) |
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Whatman 1PS Phase Separator
The
Whatman 1PS Phase Separator
is a high-grade filter paper
impregnated with a stabilized
silicone that renders it
hydrophobic, retaining the
aqueous phase and passing
the solvent phase through.
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Automatic Cut-Off, Separatory
Funnel Replacement
After being shaken, the mixed
phases are simply poured directly
into the 1PS circle which is quadrant-folded
in a funnel. The separation is
extremely rapid so it is unnecessary
to wait until the two phases have
settled into separate layers.
Droplets are automatically separated
after only a few moments, giving
a solvent phase completely free
of the aqueous phase. In many
applications, 1PS can replace
the use of separatory funnels.
The solvent phase flows through
the paper quickly and cleanly.
It then stops automatically, leaving
the aqueous phase completely in
the paper. This feature is particularly
important when carrying out a
large number of routine solvent
extractions at the same time.
Samples can be shaken with solvent
in stoppered conical flasks or
test tubes and transferred directly
to funnels containing 1PS.
Unsupervised Separation
A chief benefit of the 1PS method
is that cut-off is automatic and
complete just as soon as the solvent
phase has passed through*. The
result is no skilled operators
are required.
* Water may break through upon
prolonged standing. |
 Features
and Benefits |
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Ease
of use - no special training required
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| ． |
Any number
of separations can be processed
together |
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| ． |
Staff involvement
in routine separations is at a
minimum |
| 其他萃取產品 |
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| Whatman過濾用紙
(Filter Papers) |
| Grade 0790
Acid-washed paper with ash
content of approximately 0.01%,
low-magnesium, for the determination
of trace elements (Mg, Mn, Co,
Cu, Mo, B) |
Grade 512
Low-phosphate papers (approximately
1.5 ppm phosphate), for the filtration
of calcium lactate extracts from
soil samples for the determination
of K and P according to Egnér,
Riehm and Lederle |
| Grade 551
Black coloured paper with a medium
to slow flow rate. Provides contrast
for the detection of very fine
traces of white precipitates.
|
Grades SA 610, SA
620, SA 710, SA 720 and SA 730
Great wet strength,
fast, low blank values for sensitive
detection methods and optimized
for USA soil analysis methods.
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| Grade
1: 11µm The most
widely used filter paper for routine
applications with medium retention
and flow rate. Extended range
of sizes includes 10mm to 500mm
diameter circles and 460mm x 570mm
sheets. This filter is also available
in the Whatman FilterCup™. This
is a convenient, disposable 70mm
filter funnel with a 250mL capacity
moulded from polypropylene with
an integral, heat bonded filter.
This grade covers a wide range
of laboratory applications and
is frequently used for clarifying
liquids. Traditionally the grade
is used in qualitative analytical
separations for precipitates such
as lead sulphate, calcium oxalate
(hot) and calcium carbonate. In
agriculture, it is used for soil
analysis and seed testing procedures.
In the food industry, Grade 1
is used for numerous routine techniques
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 measured photometrically.
For gas detection, the paper is
impregnated with a chromogenic
reagent and colour formation quantified
by optical reflectance. |
Grade
2: 8µm Slightly
more retentive than Grade 1 with
a corresponding increase in filtration
time (i.e., slightly slower filtration
speed). More absorbent than Grade
1. Also available in folded (prepleated)
form as Grade 2V. In addition
to general filtration in the 8µm
particle size range, the extra
absorbency is utilized, for example,
to hold soil nutrient in plant
growth trials. Also used for monitoring
specific contaminants in the atmosphere
and in soil testing. |
| Grade
3: 6µm Double
the thickness of Grade 1 with
still finer particle retention
and excellent loading capacity;
more precipitate can be held without
clogging. The extra thickness
gives increased wet strength and
makes this grade highly suitable
for use in Büchner funnels. The
high absorbency is particularly
valuable when the paper is used
as a sample carrier. This filter
is also available in the Whatman
FilterCup. This is a convenient,
disposable 70mm filter funnel
with a 250mL capacity moulded
from polypropylene with an integral,
heat bonded filter. |
Grade
4: 20-25µm Extremely
fast filtering with excellent
retention of coarse particles
and gelatinous precipitates such
as ferric hydroxide and aluminium
hydroxide. Very useful as a rapid
filter for routine cleanup of
biological fluids or organic extracts
during analysis. Used when high
flow rates in air pollution monitoring
are required and the collection
of fine particles is not critical.
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| Grade
5: 2.5µm The maximum
degree of fine particle filtration
in the qualitative range. Capable
of retaining the fine precipitates
encountered in chemical analysis.
Slow flow rate. Excellent clarifying
filter for cloudy suspensions
and for water and soil analysis.
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Grade
6: 3µm Twice as
fast as Grade 5 with similar fine
particle retention. Often specified
for boiler water analysis applications.
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| Grade
91: 10µm
A general-purpose
crêped filter for less critical
routine analysis. Widely used
to assay sucrose in cane sugar
and within pharmaceutical laboratories
for routine filtration.
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Grade
113: 30µm
Ultra
high loading capacity with a particle
retention making it ideal for
use with coarse or gelatinous
precipitates. Fastest flow rate
of the qualitative grades. Creped
surface. Thickest filter paper
in the Whatman range. This filter
is also available in the Whatman
FilterCup. This is a convenient,
disposable 70mm filter funnel
with a 250mL capacity moulded
from polypropylene with an integral,
heat bonded filter. |
Grade
114: 25µm
Only
half the thickness of Grade 113
and suitable for coarse or gelatinous
precipitates. Smooth surface for
easy recovery of precipitates.
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| Designed
for educational use, this filter
paper is intermediate in speed
and retention between Grades 1
and 4. Student grade retains those
flocculent and medium precipitates
most often encountered in student
experiments. Available in a dispenser
pack, it can be attached to the
wall or bench, placed on a shelf
either upright or flat, and used
as a normal carton or as a convenient
dispenser. The envelopes are released
individually for easy one-at-a-time
removal. Package and envelopes
are clearly marked for size and
content. |
Grade
591: 7 - 12 µm
A thick filter paper with very
high loading capacity for fast
filtration of medium to coarse
precipitates. Offers high absorbency
and increased wet strength. Also
available pleated as 591 ½.
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Grade
597: 4 - 7 µm
A medium fast filter paper with
medium to fine particle retention.
Used for a wide variety of analytical
routine applications in different
industries like food testing (e.g.
determination of fat content acc.
to § 35 LMBG) or removal of carbon
dioxide and turbidity from beverages
(e.g. beer analysis acc. to EBC
or MEBAK). Available pleated as
597 ½. |
Grade
598: 8 - 10 µm
A thick filter paper with high
loading capacity. Combines medium
retention with medium fast to
quick filtration speed. Also available
pleated as 598 ½. |
Grade
602 h: 2 µm
A dense filter paper for collecting
very small particles and removing
fine precipitates. Used in sample
preparation, e.g. in the beverage
industry for residual sugar determination,
acidic spectra, refractometric
analysis and HPLC. Available pleated
as 602 h ½. |
| 一般實驗室分析用濾紙
(Filter papers for general laboratory
analyses) |
Grade
0858: 7 – 12 µm
Grained, with medium fast flow
rate and medium retention. A universal
filter paper, e.g. used for the
filtration of extracts, oils,
beer, syrups etc., also applied
in filter presses or for the aspiration
of liquids. Available pleated
as 0858 ½. |
Grade
0860: 12 µm
Comparable to 0858 but with a
smooth surface, slightly thinner
and faster. Also available pleated
as 0860 ½. |
Grade
0903: 4 - 7 µm
Thin filter paper with smooth
surface. Offers medium to slow
flow rate and good retention for
small particles. |
Grade
0905: 12 - 25 µm
A creped paper for coarse particles,
offers a very high filtration
speed. |
| 技術應用分析用濾紙(Filter
papers for technical applications
analyses) |
Grade
520 a: 15 - 18 µm
A thin paper with great wet strength
and a very high flow rate. Frequently
used in technical applications
like the filtration of viscous
liquids and emulsions (e.g. sweetened
juices, spirits and syrups, resin
solutions, oils or plant extracts).
Available pleated as 520 a ½.
|
Grade
520 bII: 15 - 19 µm
A thick paper with high wet strength
offering a very high flow rate.
Also available pleated as 520
bII ½. |
Grade
287
Kieselguhr paper with a medium
to slow flow rate. Additional
adsorption effect, e.g. for the
separation of very fine semi-colloidal
turbidity, for clarifying milk
serum, starch solutions, soil
suspensions or sugar-containing
solutions prior to polarimetry
or refractometry. Available pleated
as 287 ½. |
Grade
2555
A medium fast filter paper. Used
for the filtration of the mash
for the determination of the extract
in malt and wort acc. to the EBC
and for removing carbon dioxide
from beer. Available pleated as
2555 ½. |
Grade
2589 a: 6 - 12 µm
A fast to medium fast filter card
with high wet strength offering
medium retention. |
Grade
2589 c: 4 - 8 µm
Thick filter card with medium
to slow filtration speed, high
wet strength and good retention
for smaller particles. |
Grade
2589 d: 2 - 6 µm
A very thick filter card with
high wet strength. Offers medium
to slow flow rate and retains
very fine precipitates. |
Grade
2411: 9 - 11 µm
A fast filter paper with high
wet strength and medium retention.
Frequently used as protective
paper in filter presses. |
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