The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 25915.1-2010 Cleanrooms and Related Controlled Environments - Part 1: Summary of Methods for Air Cleanliness Classification
Dissolve the sample in a mixture of nitric acid and hydrofluoric acid, heat it to evaporate to dryness, and the silicon in the solution is SiF. The form of volatilization. Then dissolve the residue in nitric acid solution, dilute with ultrapure water, and determine the content of the metal elements to be analyzed in the solution using inductively coupled plasma mass spectrometry (ICP-MS). The cleanliness of the laboratory, the cleanliness of the container and instrument injection system, the purity of reagents and water, and the operating process directly affect the accuracy of the measurement results, and should be strictly controlled
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 problemsBaijian and 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 requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
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