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Quality Control

Every chemical reagent and pharmaceutical substance is only as good as its quality. Highest quality standards are the key driver of success for any company in the areas of chemicals and pharmaceuticals. The quantitative filter papers of Hahnemühle are the purest paper in the filter market. The average ash content of is 0,004%, and 0,002% ash of the hardened quantitative papers.

 

Target User:

  • QC departments of chemical and pharmaceutical industries
  • Independent control institutes and governmental control labs.

 

Typical fesaures of the filter papers:

The high consistency of the quality level assures reliable results of the analysis from one lot to the other over many years without adjusting your analysis procedure. We keep the promise of a documented production process with 100% batch traceability down to the raw material used.

 

 

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OBJECTIVE

TECHNIQUE

TYPE of FILTER

PART NUMBER-GRADE

Solid-liquid separation

Filtration

Filter paper for general use

Smooth

Crained

Creped

0860

0858

0905

Gravimetric analysis

Filtration

Filter paper quantitative analysis

589/1   589/2

589/3   589/4

589/5   589/6

Hardened filter paper for quantitative analysis

1505, 1506, 1507

Analysis of chemicals

Paper chromatography

Papers for chromatography

3469,

2043 a/b

Clarification of samples

Prefilter for membranes

Glass microfibre filters

GF 9

Analysis of extractables

Extraction

Cellulose extraction thimbles

900, 901

Determination of water content

Thermo-Gravimetry

Glass microfibre pads

Carrier 029

Carrier 040

Microbiological analyses

Retention of

microorganisms

0.2 and 0.45 mm gridded cellulose nitrate membranes, sterile

NCS 045 47 BC

NCS 020 47 BC

MCES 045 47 BC

MCES 020 47 BC

Clarification of

biological samples

0.2 and 0.45 mm cellulose acetate syringe filter, sterile

SACS 045

SACS 020

HPLC

Clarification of organic samples

Nylon syringe filter, 0.2 µm

SNY 020 25 100

Regenerated cellulose syringe filter, 0,2 µm

SCR 020

Filtration of mobile phase

Nylon membranes, or

regenerated cellulose, 0,2 µm

NY 020

CR 020

Protection of apparatus and surfaces

 Absorption

Absorbent paper with polyethylene layer

295 PE