Baijian Testing is mainly engaged in textile, insulation, cosmetics, food, hardware industry related product testing, as well as providing product certification services, but also in the broadening of the scope of the testing industry, the laboratory issued a report can be stamped CNAS/CMA/CAL qualification seal, the report is true and effective.
Display style: electronic
version of the testing cycle: 3-15 working days (expedited available)
Report qualification: CNAS, CMA, CAL, etc
Scope
This standard specifies the general rules for determining the pH value of aqueous solutions using the potentiometric method This standard is applicable to the determination of the pH value of chemical reagent aqueous solutions. The pH measurement range is 1-12
Normative reference documents
The clauses in the following documents become the clauses of this standard through reference.
. All subsequent amendments (excluding corrected content) or revisions to referenced documents that are dated are not applicable to this standard. However, parties to agreements based on this standard are encouraged to study whether the latest versions of these documents can be used. For undated references, the latest version applies to this standardGB/T601 Preparation of Standard Titration Solutions for Chemical Reagents
Preparation of Preparations and Products Used in GB/T 603 Test Methods for Chemical Reagents (GB/T 603-2002, ISO 6353-1:1982, NEQ)
GB/T 6682 Specification and Test Methods for Analytical Laboratory Water (GB/T 6682-1992, neq ISO 3696:1987)
JJG 119-2005 Laboratory pH (Acidity)
Method principle
Immerse the specified indicator electrode and reference electrode into the same measured solution to form a primary battery. The electromotive force is related to the pH value of the solution, and the pH value of the solution can be obtained by measuring the electromotive force of the primary battery.
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 ChinaTesting process
1, sending samples
2, checking requirements
3, targeted quotation
4, both parties determine, sign a contract, start
the experiment5, complete the experiment: the testing cycle (can be expedited) will be changed according to the sample and its testing items / methods, you can consult the engineer
6, issue a test report, and provide post-service.