ASTM E1891

ASTM E1891 is a technical guide for determining a survival curve for antimicrobial agents against selected microorganisms and for calculating a D-value and concentration coefficient. It is designed to help users evaluate how an antimicrobial agent performs under defined test conditions and how quickly microbial populations decline over time or with concentration. As a structured ASTM standard, it supports more consistent testing, clearer comparisons, and more reliable interpretation of antimicrobial performance data.

Purpose of ASTM E1891

The purpose of this guide is to provide a consistent approach for assessing antimicrobial activity against selected microorganisms using survival curves. ASTM E1891 also addresses the calculation of a D-value, which is commonly used to describe microbial reduction behavior, along with a concentration coefficient that may help characterize response to changing agent levels. In practical terms, the standard supports repeatable evaluation methods and more defensible test results for technical and quality-focused work.

Common use cases of ASTM E1891

This standard is commonly used when laboratories need to compare antimicrobial agents under controlled conditions and quantify their effect on selected microorganisms. It may be relevant in product development, formulation screening, performance verification, and quality control workflows where survival data must be interpreted consistently. ASTM E1891 is also useful when a technical team needs a documented method for generating data that can support product evaluation, internal specifications, or compliance-related testing.

Why ASTM E1891 matters

ASTM E1891 matters because it helps reduce variability in antimicrobial testing and gives users a clearer basis for comparing results. By guiding how survival curves, D-values, and concentration coefficients are determined, it supports more consistent data interpretation across test runs and laboratories. That consistency is valuable for procurement decisions, product qualification, and risk reduction, especially when antimicrobial performance must be demonstrated with a recognized ASTM standard.

• Survival curve determination
• D-value calculation
• Concentration coefficient evaluation
• Selected microorganism testing
• Controlled antimicrobial performance assessment