ASHLESS FILTER PAPERS FOR QUANTITATIVE ANALYSIS


DESCRIPTION

    

Ashless filters (approx. 0.004 %), recommended for quantitative analysis and routine gravimetric tests
  • Made of super-refined cotton linters and cellulose; acid-washed
  • α-cellulose content above 95 %
  • For analytical applications, routine quantitative and /or gravimetric procedures

Gravimetric, Analysis. Type of quantitative analysis that involves the precipitation of a compound that can be weighed and analysed once dried.

For critical filtering processes, we recommend hardened, ashless filters, which have greater resistance to both humidity and aggressive chemical components. (Grade: FP1505 - FP1506 - FP1507).

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TECHNICAL SPECIFICATIONS

Grade Properties
Filtration Herzberg
(s)
Retention of particles µm)

Weight (g/m²)

Thickness (mm)
Ash**
(%)
FP589/1 black Fast
50
12-25
79
0,19
0,004
FP589/2 white Medium - Fast
140
4-12
85
0,18
0,004
FP589/4 yellow Medium - Fast, Low Fat
170
4-7
81
0,17
0,004
FP589/5 red Medium Fast - Slow
450
2-4
84
0,15
0,004
FP589/6 green Slow Thin
900
2-4
74
0,15
0,004
FP589/3 blue Slow
750*
<2
84
0,16
0,004

 

* Measured with 100 mm water column instead of 50 mm
** Average value

 

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APPLICATIONS

Ref. FP589/1 – black
  • Determination of ash content and PCB contamination in foodstuffs.
  • Processing (ashing) fruit juice samples for photometric determinations (e.g. phosphate.
  • Coarse flocs and gelatinous precipitates : Fe(OH)3, Al(OH)3, Cr(OH)3, CuS, Bi2S3, SiO2.
  • Determination of heavy metals in water analysis.
Ref. FP589/2 – white
  • Determination of sand content and of grade of flour in foodstuffs.
  • Mg(NH4)PO4, CaC2O4 (hot precipitates).
  • Analysis of alkaline earth carbonates.
  • Cement industry: Blaine test (regulations UNE 80-112-91 and EN-196-6) and other chemical analyses performed on cements.
Ref. FP589/4 – yellow
  • For medium fine crystalline precipitates.
  • Specially for determination of fat.
Ref. FP589/5 – red
  • CaC2O4, BaCrO4, PbSO4 (cold precipitates).
  • Determination of fats and oils in water (floatable based on the trichlorofluorethane method or totally based on partition-gravimetric method).
  • General gravimetric analysis for many components in cements, mud, iron and steel products.
  • Soil analysis: basic filtering process for the separation of solid particles from water extractions.
  • Determination sulphates, carbonates and organic materials.
Ref. FP589/6 – green
  • For fine crystalline precipitates.
  • CaC2O4, PbSO4, BaSO4 (hot precipitates).
Ref. FP589/3 – blue
  • For very fine crystalline precipitates.
  • BaSO4 (hot precipitates), PbSO4, ZnS, NiS.
  • Oils and fats analysis of animal or vegetable origin: determination of the content in soluble impurities.
  • Treatment of drinking water and residuals: determination of chemical elements and some radioactive substances by using gravimetric, photometric, colorimetric and precipitation methods.
  • Soil analysis (soluble sulphates)

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ORDERING INFO

∅ / Grade
FP589/1
Fast
FP589/2
medium-Fast
FP589/4
medium-Fast
FP589/5
medium-Lost
FP589/6
Slow, Thin
FP589/3
Slow
12.5 mm
-
DP58920125*
-
-
-
-
40.5 mm
-
DP58920405
-
-
-
-
47 mm
DP5891047
DP5892047
DP5894047
DP5895047
DP5896047
DP5893047
55 mm
DP5891055-
DP5891055
DP5891055
DP5891055
-DP5891055
DP5891055
70 mm
DP5891070
DP5892070
DP5894070
DP5895070
DP5896070
DP5893070
90 mm
DP5891090
DP5892090
DP5894090
DP5895090
DP5896090
DP5893090
110 mm
DP5891110
DP5892110
DP5894110
DP5895110
DP5896110
DP5893110
125 mm
DP5891125
DP5892125
DP5894125
DP5895125
DP5896125
DP5893125
150 mm
DP5891150
DP5892150
DP5894150
DP5895150
DP5896150
DP5893150
185 mm
DP5891185
DP5892185
DP5894185
DP5895185
DP5896185
DP5893185
240 mm
DP5891240
DP589240
DP5894240
DP5895240
DP5896240
DP5893240
460 X 570 mm
58914657
58924657
58944657
58954657
58964657
58934657
580 x 580 mm
58915858
58925858
58945858
58955858
58965858
58935858

Presentation: 100 units / box
* Presentation: 1000 units / box (for specially Blaine Test)
Other sizes available on request

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