ISO 835-2007 PDF

Full title and description

ISO 835:2007 — Laboratory glassware — Graduated pipettes. This International Standard specifies the metrological and constructional requirements for graduated pipettes intended for general laboratory use, including marking, graduation, tolerances and calibration (to deliver, “EX”) for common pipette types.

Abstract

ISO 835:2007 defines requirements for the design, manufacture and metrological performance of graduated pipettes so they give reproducible volume measurement and delivery in routine laboratory applications. The standard consolidates and replaces the earlier ISO 835 series from 1981.

General information

• Status: Published — International Standard (confirmed, under periodic review).
• Publication date: 2007-04 (published 26 March 2007; publication process recorded March–April 2007).
• Publisher: International Organization for Standardization (ISO).
• ICS / categories: 17.060 (Measurement of volume, mass, density, viscosity).
• Edition / version: Edition 1 — ISO 835:2007.
• Number of pages: 12 pages (official ISO bibliographic record).

Scope

ISO 835:2007 specifies metrological and constructional requirements for graduated pipettes adequate for general laboratory purposes. It covers marking and design features, graduation scales, calibration (typically “to deliver” / EX), and permissible error/tolerance classes used by manufacturers and laboratories. The standard replaces the earlier multipart ISO 835 series (parts 1–4, 1981).

Key topics and requirements

• Definitions and classification of common graduated pipette types (measuring/serological/Mohr types) and delivery conventions (e.g., “to deliver” EX calibration).
• Constructional requirements: materials (glass types), tip and end shapes, firing/colouring of graduations and marking for legibility and durability.
• Graduation layout and readability: main-point rings, subdivision spacing, numeric marking and colour coding for capacity ranges.
• Metrological requirements and permitted tolerances (accuracy classes such as AS/A/B commonly used by manufacturers) with specified maximum permissible errors for nominal capacities and subdivision steps.
• Calibration and conformity marking: statement of calibration condition (e.g., EX, reference temperature ~20 °C), batch identification and tolerance indication.
• Notes on special features: cotton-plugged upper ends for some capacities, “blow-out” vs. “to deliver” types and recommended handling/waiting times affecting accuracy.

Typical use and users

Graduated pipettes compliant with ISO 835 are used in clinical, analytical and research laboratories for routine dispensing and measurement of liquids where moderate precision is required. Typical users include laboratory technicians, quality-control personnel, manufacturers of laboratory glassware, calibration laboratories and procurement/specification writers in scientific institutions.

Related standards

Standards related to ISO 835 include the ISO/TC 48 series for laboratory glassware and other volumetric apparatus standards such as the ISO 8655 series (piston-operated volumetric apparatus) and relevant national/adopted versions (EN ISO adoptions, DIN/BS/ national equivalents). ISO 835:2007 consolidated and replaced ISO 835-1 to ISO 835-4 (1981).

Keywords

graduated pipette, laboratory glassware, pipette tolerances, calibration, to deliver (EX), metrology, graduation marks, ISO 835, volumetric measurement.

FAQ

Q: What is this standard?

A: ISO 835:2007 is an International Standard that sets constructional and metrological requirements for graduated pipettes used in laboratories.

Q: What does it cover?

A: It covers pipette types and definitions, design and marking requirements, graduation layout, calibration convention (commonly “to deliver” EX), and permissible errors/tolerances for nominal capacities and graduations.

Q: Who typically uses it?

A: Manufacturers of laboratory pipettes, laboratory managers/specifiers, calibration labs and users who need to select or verify pipettes for routine analytical and clinical work.

Q: Is it current or superseded?

A: ISO 835:2007 is published and was last reviewed and confirmed by ISO in 2023 (stage 90.93). It remains the current version as of that confirmation; users should check the ISO catalogue or national bodies for any later revisions after 9 February 2023.

Q: Is it part of a series?

A: ISO 835:2007 consolidates and replaces the earlier multipart series ISO 835-1:1981, ISO 835-2:1981, ISO 835-3:1981 and ISO 835-4:1981. It sits within ISO technical work on laboratory glassware (ISO/TC 48/SC 8) and is related to other volumetric standards such as ISO 8655.

Q: What are the key keywords?

A: Graduated pipette; calibration; to deliver (EX); tolerance; accuracy class (AS/A/B); graduation; laboratory glassware; ISO 835.