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Whatman<sup>®</sup> Sterile Cellulose Nitrate MicroPlus Membranes

Whatman® Sterile Cellulose Nitrate MicroPlus Membranes

• Special membrane filters made from cellulose nitrate developed for microbiological quality control.
• High mechanical strength.
• High flow rate.
• Sterile, individually packed.
• All membrane filters have a high-contrast grid (3.1 mm).
• Type STL in dispenser boxes with 100 numbered membrane filters for easy removal and secure handling with the Membrane-Butler.

Membranes for Microbiological Control

To protect the consumer, the absence of microbial contamination in foods and beverages, pharmaceuticals and cosmetics must be assured.
In these products the microorganism counts are very low and are therefore determined quantitatively via enrichment methods. Production processes are monitored continuously at their critical points (tanks, pipelines, filling units) as are the finished products. The membrane filtration method is the optimal analytical method for doing this.
Method

The liquid is filtered through a membrane. The microorganisms collect on the membrane surface. The filter is incubated on a nutrient medium and the individual colonies can then be evaluated. The method is also suitable for large sample volumes and low microorganism counts.
Reliability

The quality control and product design of our membrane filters are strictly controlled and offer users significant advantages.
Test parameters

All membranes used for microbiological quality control are tested systematically in order to ensure the same high quality from batch to batch. Parameters tested are bubble point, flow rate, bacterial retention, recovery rate, and sterility.

Image(s) are representative of the product group and not necessarily the individual product.
Catalog Item Availability Mfr. Part # List Price Unit
889-77913 MicroPlus-21 (Cellulose Nitrate) ST Membrane Circle, white, 47 mm, 0.45 um, 3.1 mm black grid, sterile, 100/pk

10407713 $160.65 PK
889-77982 MicroPlus-21 (Cellulose Nitrate) STL Membrane Circle, white, 47 mm, 0.45 um, 3.1 mm black grid, sterile, for Membrane-Butler, 400/pk

10407112 $526.25 PK
889-77988 MicroPlus-31 (Cellulose Nitrate) STL Membrane Circle, black, 47 mm, 0.45 um, 3.1 mm white grid, sterile, for Membrane-Butler, 400/pk

10407132 $526.25 PK
889-77994 MicroPlus-41 (Cellulose Nitrate) STL Membrane Circle, green, 47 mm, 0.45 um, 3.1 mm black grid, sterile, for Membrane-Butler, 400/pk

10407170 $526.25 PK
889-77916 MicroPlus-21 (Cellulose Nitrate) ST Membrane Circle, white, 50 mm, 0.45 um, 3.1 mm black grid, sterile, 100/pk

10407714 $168.45 PK
889-77985 MicroPlus-21 (Cellulose Nitrate) STL Membrane Circle, white, 50 mm, 0.45 um, 3.1 mm black grid, sterile, for Membrane-Butler, 400/pk

10407114 $546.00 PK
889-77919 MicroPlus-31 (Cellulose Nitrate) ST Membrane Circle, black, 50 mm, 0.45 um, 3.1 mm white grid, sterile, 100/pk

10407734 $168.45 PK
889-77991 MicroPlus-31 (Cellulose Nitrate) STL Membrane Circle, black, 50 mm, 0.45 um, 3.1 mm white grid, sterile, for Membrane-Butler, 400/pk

10407134 $546.00 PK
889-77997 MicroPlus-41 (Cellulose Nitrate) STL Membrane Circle, green, 50 mm, 0.45 um, 3.1 mm black grid, sterile, for Membrane-Butler, 400/pk

10407172 $546.00 PK

Description Back to Top

• Special membrane filters made from cellulose nitrate developed for microbiological quality control.
• High mechanical strength.
• High flow rate.
• Sterile, individually packed.
• All membrane filters have a high-contrast grid (3.1 mm).
• Type STL in dispenser boxes with 100 numbered membrane filters for easy removal and secure handling with the Membrane-Butler.

Membranes for Microbiological Control

To protect the consumer, the absence of microbial contamination in foods and beverages, pharmaceuticals and cosmetics must be assured.
In these products the microorganism counts are very low and are therefore determined quantitatively via enrichment methods. Production processes are monitored continuously at their critical points (tanks, pipelines, filling units) as are the finished products. The membrane filtration method is the optimal analytical method for doing this.
Method

The liquid is filtered through a membrane. The microorganisms collect on the membrane surface. The filter is incubated on a nutrient medium and the individual colonies can then be evaluated. The method is also suitable for large sample volumes and low microorganism counts.
Reliability

The quality control and product design of our membrane filters are strictly controlled and offer users significant advantages.
Test parameters

All membranes used for microbiological quality control are tested systematically in order to ensure the same high quality from batch to batch. Parameters tested are bubble point, flow rate, bacterial retention, recovery rate, and sterility.

Image(s) are representative of the product group and not necessarily the individual product.

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