ASTM E1189-00(2022) PDF

Overview

ASTM E1189-00(2022) is the standard specification issued by ASTM International for micro-burets (Koch style) designed for laboratory use. This specification ensures consistency, accuracy, and durability in the production and use of Koch-type glass micro-burets, which are essential tools for precise volumetric measurements in various analytical procedures. The standard outlines material requirements, dimensional tolerances, and construction details for two specific styles of micro-burets, enhancing their reliability and performance across laboratory settings.

Key Topics

• Material Requirements: Micro-burets must be manufactured from Type I, Class A or B glass, ensuring chemical resistance and mechanical strength suitable for laboratory applications.
• Stopcocks and Joints: All burets must include permanently attached stopcocks, either with glass plugs (per ASTM E675) or PTFE plugs (per ASTM E911), for leak-proof operation. Joints and stoppers must meet additional ASTM specifications for interchangeability and integrity.
• Design Styles:
  • Style I: Features a detachable tip (7/25 joint or SJ 12/5 joint) with the reservoir and graduated sections secured together to prevent breakage.
  • Style II: Incorporates a detachable noble metal tip (platinum or platinum alloys) sealed to glass, with a separate reservoir and graduated section joined by a spherical ground joint.
• Graduation and Calibration: The graduated section of the burets meets the scale and tolerance requirements of ASTM E694, providing precise measurement capabilities.
• Performance Parameters: Specifications include strict values for capacity, scale length, diameter, outflow time, and tolerance, supporting high accuracy in laboratory titrations and measurements.
• Compliance and Testing: Sampling and testing protocols refer to ASTM E1157, ensuring product conformity to specified standards.

Applications

ASTM E1189-00(2022) compliant micro-burets play a critical role in settings where accuracy and repeatability are paramount:

• Chemical and Clinical Laboratories: For performing titrations, sample preparation, and reagent delivery.
• Educational Institutions: In chemistry and biology teaching labs requiring reliable volumetric apparatus.
• Pharmaceutical and Environmental Testing: Where precise quantification of analytes is essential.
• Research and Development: Supporting advanced experimental procedures that demand consistent, traceable measurements.

By adhering to this standard, laboratories can ensure the use of quality-assured glassware, increasing confidence in analytical results and supporting regulatory compliance.

Related Standards

The specification references several important ASTM standards that together create a robust quality framework for laboratory glassware:

• ASTM E438 - Specification for Glasses in Laboratory Apparatus
• ASTM E675, E676, E677 - Specifications for Interchangeable Taper-Ground and Spherical Joints/Stopcocks
• ASTM E694 - Specification for Laboratory Glass Volumetric Apparatus
• ASTM E911 - Specification for Glass Stopcocks with Polytetrafluoroethylene (PTFE) Plugs
• ASTM E920, E921 - Specifications relating to packaging of laboratory apparatus
• ASTM E1133 - Practice for performance testing of packaged laboratory apparatus
• ASTM E1157 - Specification for sampling and testing of reusable laboratory glassware

Practical Value

Utilizing micro-burets conforming to ASTM E1189-00(2022) assures laboratories of:

• Consistency in volumetric measurements
• Interchangeability and compatibility with other laboratory equipment
• Reduced risk of contamination and breakage
• Compliance with international standardization principles, supporting quality assurance and traceability

Keywords: micro-buret, Koch style, ASTM E1189, laboratory glassware, volumetric apparatus, chemical analysis, standard specification