This International Standard provides metrological and construction requirements for an internationally acceptable series of burettes, suitable for general laboratory purposes. The details specified are in accordance with the principles of design and construction of volumetric glassware given in ISO 384. For piston burettes, see ISO 8655-3.
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Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Basis of adjustment
4.1 Unit of volume
4.2 Delivery volume
4.3 Reference temperature
5 Types and classes of accuracy
5.1 Classes of accuracy
5.2 Types of burette
6 Maximum permissible errors
7 Material
8 Construction
8.1 Dimensions
8.2 Top of burette
8.3 Stopcocks and similar devices
8.4 Stopcock leakage
8.5 Delivery jet
8.6 Delivery time
8.7 Waiting time
9 Graduation, figuring and patterns
9.1 Graduating patterns
9.2 Position of graduation lines
9.3 Marking of graduation lines
10 Setting of the meniscus
11 Markings
12 Visibility of graduation lines, numbers and inscriptions
Annex A Burettes for which no waiting time is specified (normative)
Annex B Burettes for which a 30 s waiting time is specified (normative)
ISO 384:1978 Laboratory glassware -- Principles of design and construction of volumetric glassware
ISO 4787:1984 Laboratory glassware -- Volumetric glassware -- Methods for use and testing of capacity
ISO 719:1985 Glass -- Hydrolytic resistance of glass grains at 98 degrees C -- Method of test and classification
ISO 384:1978 Laboratory glassware -- Principles of design and construction of volumetric glassware
ISO 4787:1984 Laboratory glassware -- Volumetric glassware -- Methods for use and testing of capacity
ISO 719:1985 Glass -- Hydrolytic resistance of glass grains at 98 degrees C -- Method of test and classification