ISO 8655-7:2022
Piston-operated volumetric apparatus — Part 7: Alternative measurement procedures for the determination of volume
This document specifies alternative measurement procedures for the determination of volume of piston-operated volumetric apparatus.
The procedures are applicable to complete systems comprising the basic apparatus and all parts selected for use with the apparatus, disposable or reusable, involved in the measurement by delivery process (Ex). Methods described in this document are suitable for various maximum nominal volumes of piston-operated volumetric apparatus. It is the responsibility of the user to select the appropriate method.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Metrological confirmation
4.2 Uncertainty of measurement
4.3 Operator qualification
5 Performance requirements
5.1 Performance tolerances
5.2 Operator impact
6 Test conditions
6.1 General
6.2 Test equipment
6.3 Test room, environmental conditions
6.4 Test volumes
6.4.1 Fixed volume POVA
6.4.2 Adjustable volume POVA
6.5 Number of measurements per test volume
6.6 Test liquids
7 Evaluation
7.1 Mean volume
7.2 Systematic error of measurement
7.3 Random error of measurement
8 Test methods
8.1 General
8.2 Gravimetric method
8.3 Dual-dye ratiometric photometric method
8.4 Single dye photometric method
8.5 Hybrid photometric/gravimetric method for multichannel POVA
8.6 Titration method
8.7 Batch testing
9 Dispense procedures
9.1 General
9.2 Preparation
9.3 Single-channel air displacement pipettes (in accordance with ISO 8655-2)
9.3.1 General
9.3.2 Test cycle
9.4 Multi-channel pipettes (in accordance with ISO 8655-2)
9.5 Positive displacement pipettes (in accordance with ISO 8655-2)
9.6 Burettes (in accordance with ISO 8655-3)
9.7 Dilutors (in accordance with ISO 8655-4)
9.7.1 General
9.7.2 Test cycle
9.8 Dispensers (in accordance with ISO 8655-5)
9.9 Syringes (in accordance with ISO 8655-9)
9.9.1 General
9.9.2 Test cycle
10 Reporting of results
Annex A (normative) Gravimetric procedure
Annex B (normative) Dual-dye ratiometric photometric procedure
Annex C (normative) Single dye photometric procedure
Annex D (normative) Photometric/gravimetric hybrid procedure
Annex E (normative) Titrimetric procedure
Annex F (normative) Conversion of liquid mass to volume
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 General requirements
4.1 Metrological confirmation
4.2 Uncertainty of measurement
4.3 Operator qualification
5 Performance requirements
5.1 Performance tolerances
5.2 Operator impact
6 Test conditions
6.1 General
6.2 Test equipment
6.3 Test room, environmental conditions
6.4 Test volumes
6.4.1 Fixed volume POVA
6.4.2 Adjustable volume POVA
6.5 Number of measurements per test volume
6.6 Test liquids
7 Evaluation
7.1 Mean volume
7.2 Systematic error of measurement
7.3 Random error of measurement
8 Test methods
8.1 General
8.2 Gravimetric method
8.3 Dual-dye ratiometric photometric method
8.4 Single dye photometric method
8.5 Hybrid photometric/gravimetric method for multichannel POVA
8.6 Titration method
8.7 Batch testing
9 Dispense procedures
9.1 General
9.2 Preparation
9.3 Single-channel air displacement pipettes (in accordance with ISO 8655-2)
9.3.1 General
9.3.2 Test cycle
9.4 Multi-channel pipettes (in accordance with ISO 8655-2)
9.5 Positive displacement pipettes (in accordance with ISO 8655-2)
9.6 Burettes (in accordance with ISO 8655-3)
9.7 Dilutors (in accordance with ISO 8655-4)
9.7.1 General
9.7.2 Test cycle
9.8 Dispensers (in accordance with ISO 8655-5)
9.9 Syringes (in accordance with ISO 8655-9)
9.9.1 General
9.9.2 Test cycle
10 Reporting of results
Annex A (normative) Gravimetric procedure
Annex B (normative) Dual-dye ratiometric photometric procedure
Annex C (normative) Single dye photometric procedure
Annex D (normative) Photometric/gravimetric hybrid procedure
Annex E (normative) Titrimetric procedure
Annex F (normative) Conversion of liquid mass to volume
Bibliography