Graduated Cylinders – Class A, USP, Certified

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Graduated Cylinders – Class A, USP, Certified

Product and ordering information for Graduated Cylinders – Class A, USP, Certified. Available in all ISO sizes from 5mL to 2000mL. Made of low expansion coefficient, chemically resistant Borosilicate 3.3. Supplied with a batch number and an accompanying USP batch certificate.

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Description

Class A, USP, certified graduated cylinders. High contrast blue enamel print represents the optimum combination of resistance and readability. Full ring marks and major graduations. Made with BRAND's flexible screen stencils which ensures the volume markings match the calibration marks at all intermediate volumes. Available in all ISO sizes from 5mL to 2000mL. Made of low expansion coefficient, chemically resistant Borosilicate 3.3.

All BLAUBRAND® USP graduated cylinders are supplied with a batch number and an accompanying USP batch certificate in the original packaging.

Volumetric instruments according to USP error limits

Companies producing pharmaceutical products for the US market are supervised by US authorities, e.g. the FDA (Food and Drug Administration), and have to meet the requirements of the USP (United States Pharmacopeia). The current USP prescribes in section 31 the use of volumetric instruments with accuracy in accordance to class A of the ASTM standards and list those for volumetric flasks, transfer pipettes and burettes in tables. For graduated pipettes up to and including 10 mL size the error limits are mentioned in the text. BRAND volumetric instruments are manufactured according to the current DIN EN ISO standards. As the construction specifications are differently defined in the DIN EN ISO and ASTM standards, the error limits differ as well. With included USP certificates BRAND confirms for the delivered USP volumetric instruments that the class A error limits according to the USP or, rather, ASTM standards are met.

Every glass volumetric measuring instrument is individually calibrated. Computer-controlled systems ensure maximum precision in a fully automated production line. The final step of this Statistical Process Control is random sampling of finished product according to DIN ISO 3951. The quality management system applied at BRAND, which is certified according to DIN EN ISO 9001, is a combination of process monitoring and random checks with an accepted quality level (AQL) of approximately 0.4.

The batch certificate confirms that ASTM class A error limits required by USP are met. The certificate records the mean value, the standard deviation of the batch and the date of issue (batch number: year of manufacture/batch).

Product No. & Specs



Class A, USP, Certified Graduated Cylinders

  Volume
   mL
Subdivision
mL
Error limits
± mL
Height
mm
Qty/Pack
Cat. No.
  5
0.1
0.05
115
2
32805
  10
0.2
0.10
140
2
32808
  25
0.5
0.25
170
2
32820
  50
1
0.5
200
2
32828
  100
1
0.5
260
2
32838
  250
2
1.0
335
2
32848
  500
5
2.5
365
2
32854
  1000
10
5
465
1
32862
  2000
20
10
505
1
32864
• High contrast blue enamel print

FAQs

What is Boro 3.3 glass?

The abbreviation Boro 3.3 stands for a borosilicate glass type 3.3 as specified in international standard DIN ISO 3585, for applications requiring very good chemical and thermal resistance (including resistance to thermal shock), and high mechanical stability. Typical applications are components for chemical apparatus, round-bottom flasks, and beakers.

What is AR-GLAS®?

AR-GLAS® is a type of soda-lime glass with good chemical and physical properties. Soda-lime glass is the most common type (90%) of manufactured glass. It is suitable for products which are usually subjected to short-term chemical exposure, and to limited thermal stress (e.g. pipettes, culture tubes).

How should I clean my volumetric glassware?

For increased service life it is recommended that you clean your volumetric instruments with:

  • No mechanical abrasion
  • Low alkaline detergents
  • Low temperature: < 70°C
  • Short duration: < 20 minutes

What is the advantage to using glass vs. plastic?

Glass has very good chemical resistance against water, saline solutions, acids, alkalis and organic solvents, and in this respect surpasses the majority of plastics. It is only attacked by hydrofluoric acid, and - at elevated temperatures - by strong alkalis and concentrated phosphoric acid. Further advantages of glass are its dimensional stability, even at elevated temperatures, and its high transparency.

What kind of screening ink is used for printing the volumetric glassware?

Blue and white enamel are printed on the outer surface and provide a high contrast and an optimal combination of chemical resistance and legibility for the volumetric glassware.

How are the graduated cylinders calibrated?

The graduated cylinders are calibrated "To contain" (TC, IN). The contained quantity of liquid correspond exactly to the capacity indicated on the instrument.

How can the meniscus be easily read?

The volume of a concave meniscus has to be read at the lowest point of the liquid level. Here the lowest point of the meniscus has to touch the upper edge of the graduation mark. For parallax-free adjustment of the meniscus, the pipette is held upright and the observer's eye must be at the same height as the meniscus. In this position the ring mark will appear as a line. If the background is light, a piece of dark paper held behind the instrument immediately beneath the ring or graduation mark will make the meniscus appear darker and more easily readable.

Tech Info

Volumetric Glassware SOP

Literature

Catalog Page
BRAND Class A, USP, Volumetric Glassware
Are Your Glass Volumetric Instruments Accurate?
USP Requirements for Volumetric Instruments