ASTM E1153 Surface Sanitizer Efficacy Testing for Hard Non-Porous Surfaces
ASTM E1153 tests the antibacterial properties of sanitizers against staphylococcus aureus, klebsiella pneumonia, and enterobacter aerogenes. When testing organisms that aren't included here, the procedure may need to be tweaked. Modifications may also be necessary for assessing spray-based or towelette-based antimicrobial products not detailed below (see Test Method E2274).
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Overview
ASTM E1153 specifies a standardized quantitative carrier test method to evaluate the effectiveness of sanitizers on inanimate, hard, nonporous, non-food contact surfaces. The method measures the reduction of selected microorganisms on contaminated carriers after treatment with a sanitizer under controlled conditions.
This test is widely used to validate sanitizer performance for environmental hygiene applications such as floors, walls, and equipment exteriors. By determining microbial reduction levels, ASTM E1153 ensures that products meet required efficacy standards. It supports regulatory compliance, product development, and quality assurance by providing reproducible and comparable antimicrobial performance data.
Scope, Applications, and Benefits
Scope
ASTM E1153 defines procedures to determine sanitizer efficacy by measuring reduction of microorganisms on nonporous surfaces using a carrier-based test system. It ensures controlled contamination, exposure, and recovery for reliable antimicrobial evaluation.
- Evaluates sanitizers on hard, nonporous, non-food contact surfaces
- Uses carrier-based contamination and recovery methodology
- Measures reduction of specific test microorganisms
- Applicable to liquid and spray sanitizing formulations
- Conducted under controlled laboratory conditions
Applications
- Evaluation of surface sanitizers for industrial environments
- Validation of cleaning products for public facilities
- Hygiene product development and formulation testing
- Regulatory compliance and product registration
- Quality control of antimicrobial products
- Comparative analysis of sanitizer effectiveness
Benefits
- Provides standardized and reproducible efficacy data
- Ensures reliable microbial reduction measurement
- Supports regulatory approval and labeling claims
- Enables comparison across different sanitizer formulations
- Enhances hygiene and contamination control assurance
- Improves product development and optimization
Test Process
Carrier Inoculation
Test surfaces are inoculated with a known concentration of microorganisms and dried under controlled conditions.
1Sanitizer Application
The sanitizer is applied to the contaminated carriers for a specified contact time.
2Neutralization and Recovery
Surviving microorganisms are neutralized and recovered using appropriate techniques.
3Microbial Enumeration
Recovered organisms are cultured and counted to determine reduction levels.
4Technical Specifications
| Parameter | Details |
|---|---|
| Standard | ASTM E1153 |
| Test Principle | Quantitative carrier-based evaluation of microbial reduction on treated surfaces |
| Applicable Products | Liquid or spray sanitizers for non-food contact surfaces |
| Test Surfaces | Hard, nonporous materials such as glass, stainless steel, or plastic |
| Test Organisms | Specified bacterial strains |
| Measurement Output | Log₁₀ reduction in microbial population |
| Inoculum Level | Typically ≥10⁵–10⁶ CFU per carrier |
| Contact Time | Defined exposure duration as per product label or protocol |
Instrumentation Used for Testing
- Sterile carriers (glass, stainless steel, plastic)
- Microbial culture media and Petri dishes
- Incubator for bacterial growth
- Pipettes and dilution equipment
- Neutralizing agents
- Colony counter
- Laminar airflow cabinet
- Data recording system
Results and Deliverables
- Log reduction values of test microorganisms
- Sanitizer efficacy performance data
- Compliance with ASTM E1153 criteria
- Test report with methodology and conditions
- Comparative analysis of product performance
- Validation data for regulatory submission
Frequently Asked Questions
ASTM E1153 evaluates the ability of sanitizers to reduce microbial contamination on hard, nonporous surfaces by quantifying log reductions, ensuring products meet hygiene performance requirements for environmental surface disinfection.
Carrier methods simulate real-world contamination on surfaces, providing a realistic assessment of sanitizer performance compared to suspension tests, which may not reflect actual surface interactions.
Log reduction represents the decrease in microbial population on a logarithmic scale. Higher log reductions indicate greater sanitizer effectiveness in reducing contamination on treated surfaces.
Errors include improper neutralization, inconsistent inoculation, contamination, and inaccurate microbial counting, all of which can affect reliability.
By validating sanitizer effectiveness, the standard ensures reliable microbial control on surfaces, reducing contamination risks and improving overall hygiene standards.
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