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Detection Standard GB/T 6283- Determination of Water Content in Chemical Products, Karl Fischer Method (General Method) (GB/T 6283-2008, ISO 760:1978, NEQ) GB/T 8571 Laboratory Sample Preparation of Compound Fertilizers HG/T 2843 Fertilizer Products, Common Standard Dropping Solutions for Chemical Analysis, Standard Solutions Reagent solution and indicator solution Principle The free water in the sample is quantitatively reacted with Karl Fischer reagent with known water titrations, and the reaction formula is as follows: H: O+I:+SO:+3CaHsN=2CH: N · HI+CH; N- 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 problems100% inspection 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
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