Environmental (water quality) testing of origin

1. Total bacterial count 1.1 Plate counting method 1.1.1 Scope This standard specifies the use of plate counting method to determine the total bacterial count in drinking water and its source water. This method is applicable to the determination of total bacterial count in drinking water and its source water. 1.1.2 Terms and Definitions The following terms and definitions apply to this standard. 1.1.2.1 Standard plate count bacteria The total number of colonies in 1 mL of water sample obtained after cultivation on nutrient agar under aerobic conditions at 37 ℃ for 48 hours. 1.1.3 Culture medium and reagents 1.1.3.1 Nutrient agar 1.1.3.1.1 Composition: A protein aged 10 g, B beef extract 3 g, sodium chloride 5 g, D agar 10 g to 20 g, E distilled water 1 oo0 mL 1.1.3.1.2 Preparation method: Mix the above ingredients, heat them to dissolve, adjust the pH to 7.4~7.6. Divide them into glass containers (if using agar with high impurities, filter them first), sterilize them at 103.43 kPa (121 ℃. 15 lb) for 20 minutes, and store them in a cold and dark place for future use

Function of testing report:

1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report

2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms

3. Used as a sales report: issuing legally effective testing reports to make consumers more confident

4. Papers and research: Provide professional personalized testing needs

5. Judicial services: providing scientific, fair, and accurate testing data

6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problems

BAIJIAN testing process:

1. Telephone communication and confirmation of requirements

2. Recommend solutions and confirm quotations

3. Mail samples and arrange testing

4. Progress tracking and result feedback

5. Provide reports and after-sales service

6. If urgent or priority processing is required

Our Competitive Edge:

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4. Free initial testing, with no testing fees charged

5. Self service order delivery for free on-site sampling

6. Short cycle, low cost, and attentive service

7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc

8. The testing report is authoritative and effective, and is generally used in China