HARDENED LOW ASH FILTER PAPERS FOR QUALITATIVE ANALYSIS


DESCRIPTION

    

Hardened low ash filter papers (approx. 0.05 % ) with high chemical and mechanical resistance, specially recommended for vacuum and pressure filtration, and for the use of acidic and alkaline solutions.
  • Made of super-refined cotton linters and cellulose.
  • α-cellulose content above 95 %.
  • High wet strength; easy to scrap off or wash off precipitates; no fiber release.
  • Low ash content (approx. 0.05 %).
  • High resistance to aggressive chemical components, like sulfuric and nitric acids (up to 40 % at 50 °C) and alkalis (up to 10 % at 20 °C).
  • 2 types: plain (DP) and folded (DF).

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TECHNICAL SPECIFICATION

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

Weight
(g/m²)
Thickness
(mm)
Ash**
(%)
FP1573 Fast
50
12-25
88
0,17
0.002
FP1574 Medium
170
7-12
90
0,16
0.002
FP1575 Slow
600*
<2
90
0,14
0.002

* Measured with 150 mm water column instead of 50 mm
** Average value

 

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APPLICATIONS

Ref. FP1573

  • For coarse crystalline precipitates.
  • Iron hydroxide, aluminium, chrome, copper sulfate, bismuth, cobalt and iron.
  • Silicon determination in iron analysis.
Ref. FP1574
  • For fine crystalline precipitates.
  • Calcium oxalate, metal sulfide and barium sulfate, lead molybdate.
  • Emission controls on atmospheric pollution (sulfur oxide, ammoniac gases, etc.).
  • Fat-extracting equipment.
  • Oil and food industry.
Ref. FP1575
  • Retention of very fine precipitates, such as barium sulfate, zinc sulfide, etc.

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ORDERING INFO

GRADE
FP1573
FP1573
FP1574
FP1574
FP1575
FP1575
∅
Fast
Fast
Medium
Medium
Slow
Slow
 
Plain
Folded
Plain
Folded
Plain
Folded
42.5 mm
DP15730425
-
DP15740425
-
DP15750425
-
47 mm
DP1573047
-
DP1574047
-
DP1575047
-
55 mm
DP1573055
-
DP1574055
-
DP1575055
-
70 mm
DP1573070
-
DP1574070
-
DP157070
-
90 mm
DP1573090
-
DP15743090
-
DP1575090
-
110 mm
DP1573110
-
DP1574110
DF1574110
DP1575110
-
125 mm
DP1573125
DF1573125
DP1574125
DF1574125
DP1575125
DF1575125
150 mm
DP1573150
DF1573150
DP1574150
DF1574150
DP1575150
DF1575150
185 mm
DP1573185
DF1573185
DP1574185
DF1574185
DP1575185
DF1575185
200 mm
DP1573200
-
DP1574200
-
DP1575200
-
240 mm
DP1573240
DF1573240
DP1574240
DF1574240
DP1575240
-
270 mm
-
 DF1573270
-
-
-
-
320 mm
DP1573320
-
DP1574320
-
DP1575320
-
500 mm
DP1573500
-
DP1574500
-
DP1575500
-
460 X 570 mm
15734657
-
15744657
-
15754657
-

 

Presentation: 100 units / box
Other sizes available on request

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