| Project Background

Total bacterial count testing is a core biological indicator for evaluating the degree of microbial contamination in purified water. It directly reflects the disinfection effectiveness and microbial control capacity of water treatment systems (such as storage and distribution systems). The presence of microorganisms may lead to product contamination and spoilage, biofilm formation blocking pipelines, and compromised reliability of experimental or production results.

| Project Overview

This test analyzes the total bacterial count in purified water samples using the nutrient agar culture method and the test strip method. The working principle of this method is based on the theory of microbial cultivability. A quantified water sample is dropped onto the surface of a solid culture medium and incubated under suitable conditions for a specified duration. The colonies formed on the filter membrane are then counted as Colony-Forming Units (CFU), thereby quantitatively evaluating the total number of culturable aerobic microorganisms present in the water sample.

| Test Objective

1. Regulatory and industry compliance;

2. Monitoring the operational stability of purified water systems;

3. Providing critical data support for system maintenance, cleaning validation, and deviation investigations.

| Testing Standards

ASTM D1193 Standard Specification for Reagent Water

GB 4789.2 National Food Safety Standard — Food Microbiological Examination: Determination of Total Bacterial Count

| Service Products / Fields

Consumer electronics, automotive electronics, semiconductor manufacturing, pharmaceutical biotechnology, aerospace, new energy electronics, laboratories, and analytical testing.

| Project Advantages

1. Professional Team: A team of highly experienced testing engineers and technical experts.

2. Advanced Equipment: Equipped with internationally leading testing instruments to ensure accuracy and reliability of results. Direct quantification, intuitive results, and strong regulatory compliance.

3. Efficient Service: Rapidly respond to customer needs and provide one-stop, high-efficiency inspection services.

4. Authoritative Certification: The laboratory is certified by ISO/IEC 17025, ensuring that test reports have international credibility.