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AS 2162.2-1998

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AS 2162.2-1998

Verification and use of volumetric apparatus Guide to the use of piston-operated volumetric apparatus (POVA)

Standards Australia

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Table of Contents

1 -  AS 2162.2-1998 VERIFICATION AND USE OF VOLUMETRIC APPARATUS - GUIDE TO THE USE OF PISTON-OPERATED VOLUMETRIC APPARATUS (POVA)
4 -  PREFACE
 5 -  CONTENTS
 6 -  FOREWORD
 7 -  SECTION 1 SCOPE AND GENERAL
7 -  1.1 SCOPE
 7 -  1.2 REFERENCED DOCUMENTS
 7 -  1.3 DEFINITIONS
7 -  1.3.1 Accuracy of measurement
 7 -  1.3.2 Adjustable POVA
 8 -  1.3.3 Air displacement
 8 -  1.3.4 Calibration
 8 -  1.3.5 Dead volume
 8 -  1.3.6 Diluter
 8 -  1.3.7 Dispenser
 8 -  1.3.8 Displacement burette
 8 -  1.3.9 Disposable
 8 -  1.3.10 Durability
 8 -  1.3.11 Forward mode
 8 -  1.3.12 Measurand
 8 -  1.3.13 Pipetter
 8 -  1.3.14 Piston device
 8 -  1.3.15 Piston-operated volumetric apparatus, POVA
 8 -  1.3.16 Positive displacement
 8 -  1.3.17 Precision
 8 -  1.3.18 Pre-rinsing
 9 -  1.3.19 Reference temperature
 9 -  1.3.20 Repeatability
 9 -  1.3.21 Repeatability conditions
 9 -  1.3.22 Re-useable
 9 -  1.3.23 Reverse mode
 9 -  1.3.24 Sample carry over
 9 -  1.3.25 Unit of volume
 9 -  1.3.26 Verification
 9 -  1.3.27 Working range
 9 -  1.4 GENERAL MATTERS
9 -  1.4.1 Volume
 9 -  1.4.2 Selection of a POVA
 9 -  1.4.3 Performance validation
 9 -  1.5 SAFETY
 10 -  SECTION 2 CONSTRUCTION
10 -  2.1 SCOPE OF SECTION
 10 -  2.2 MATERIALS
10 -  2.2.1 Chemical resistance
 10 -  2.2.2 Stability
 10 -  2.2.3 Lubricants
 10 -  2.3 DESIGN
10 -  2.3.1 Liquid displacement
 11 -  2.3.2 Mode of operation
 11 -  2.3.3 Reservoir
 11 -  2.3.4 Delivery
 11 -  2.3.5 Disposable tips
 11 -  2.4 GRADUATION AND NUMBERING OF VARIABLE VOLUME POVA
11 -  2.4.1 Legibility
 11 -  2.4.2 Numbering of lines
 12 -  SECTION 3 OPERATING PRINCIPLES
12 -  3.1 SCOPE OF SECTION
 12 -  3.2 PIPETTES
12 -  3.2.1 General
 12 -  3.2.2 Method of use
 13 -  3.3 DISPENSERS
 14 -  3.4 DILUTERS
 15 -  3.5 DISPLACEMENT BURETTES
 16 -  SECTION 4 CALIBRATION PROCEDURE
16 -  4.1 SCOPE
 16 -  4.2 EQUIPMENT, MATERIALS AND ENVIRONMENT
16 -  4.2.1 Balance
 16 -  4.2.2 Weighing vessels
 18 -  4.3 AMBIENT CONDITIONS
 18 -  4.4 CALIBRATION TEST
18 -  4.4.1 General
 18 -  4.4.2 Pipetters
 19 -  4.4.3 Dispensers
 20 -  4.4.4 Number of replicate tests
 20 -  4.4.5 Diluters
 20 -  4.4.6 Displacement burettes
 20 -  4.5 CALCULATIONS
20 -  4.5.1 General
 20 -  4.5.2 Individual weighings
 20 -  4.5.3 Evaporation
 20 -  4.5.4 Test temperature
 20 -  4.5.5 Mean weighing result
 20 -  4.5.6 Mean volume
 22 -  4.6 PERFORMANCE STATISTICS
22 -  4.6.1 Standard deviation
 22 -  4.6.2 Coefficient of variation
 22 -  4.6.3 Confidence interval
 23 -  4.7 CALIBRATION REPORT
 25 -  SECTION 5 VERIFICATION PROCEDURE
25 -  5.1 SCOPE OF SECTION
 25 -  5.2 FUNCTIONAL TESTS
 25 -  5.3 FREQUENCY OF TESTING
 25 -  5.4 VERIFICATION TEST
25 -  5.4.1 Principle
 25 -  5.4.2 Test procedure
 25 -  5.4.3 Replicate test
 25 -  5.4.4 Single-use test for disposable tips
 26 -  5.4.5 Adjustable volume POVA
 26 -  5.4.6 Performance tolerances
 26 -  5.4.7 Performance testing
 26 -  5.4.8 Effects of different liquids
 27 -  APPENDIX A - VOLUMETRIC ERRORS IN THE DELIVERY OF SMALL VOLUMES OF LIQUIDS
27 -  A1 GENERAL
 27 -  A2 METHOD

Abstract

Sets out methods of testing and guidelines for the operation of piston-operated volumetric apparatus (POVA) to improve accuracy and repeatability in delivering measured volumes of liquids in analytical procedures. Volumetric errors in delivery of small volumes of liquids other than water are covered in an appendix.

Scope

This Standard provides guidelines for the design and construction of piston-operated volumetric apparatus (POVA) used in laboratories for dispensing precise volumes of liquid. Methods for the use, verification and calibration of these instruments are included. The following types are considered:
(a) Pipetters.
(b) Dispensers.
(c) Diluters.
(d) Displacement burettes.

NOTES:
1 The test requirements and the number of significant figures contained in the tables in this Standard relate to their use in the calibration procedures described in Section 4.
2 When laboratories use this Standard to verify POVA as described in Section 5 such attention to detail may not be as critical.

General Product Information

Document Type Standard
Status Current
Publisher Standards Australia
Committee CH-001
Supersedes
  • AS 4163-1994
  • DR 97372