Reaffirmed 2023

NATIONAL FOREWORD

This Indian Standard (Second Revision) which is identical with ISO 648 : 2008 ‘Laboratory glassware — Single-volume pipettes’ issued by the International Organization for Standardization (ISO) was adopted by the Bureau of Indian Standards on the recommendation of the Glass, Glassware and Laboratoryware Sectional Committee and approval of the Chemical Division Council.

This standard was originally published in 1958 and subsequently revised in 1975 keeping in view the trend at the level ISO in prescribing closer tolerances on capacities and proportionate delivery time and bringing about uniformity in the finish of pipettes. In that revision, pipettes of nominal capacities 0.5 and 200 ml had been included and those of capacities 3, 4, 15, 30, 35, 40 and 70 ml had been excluded. Further, the 0.5-ml pipette without bulb, the 1-ml pipette both with and without bulb and the 2-ml pipette with bulb for Class of accuracy A and both with and without bulb for Class of accuracy B had been specified. All the remaining sizes had been specified with bulb only.

Considering the importance of following uniform practices globally, the committee felt the need of revising this standard and also felt that it would be more convenient to prepare this standard by adoption of ISO 648 on dual number basis. In this revision, the title of this standard has been modified in line with ISO standard.

The text of ISO standard has been approved as suitable for publication as an Indian Standard without deviations. Certain conventions are, however, not identical to those used in Indian Standards. Attention is particularly drawn to the following:

a) Wherever the words ‘International Standard’ appears referring to this standard, they should be read as ‘Indian Standard’.

b) Comma (,) has been used as a decimal marker, while in Indian Standards the current practice is to use a point (.) as the decimal marker.