How to do the test report? Why do you need to do product inspection? Third-party testing institutions provide product testing services in various industries, and there are many cooperative laboratories across the country, mainly serving companies, enterprises, individual businesses, universities and scientific research.

Sample size: according to the size of the sample to choose the sample or door-to-door

display style: electronic

version of the detection cycle: 3-15 working days (expedited).

Standard number: ETSI TS 101 512-2001 Chinese standard name: ETSI TS 101 512-2001 Digital Cellular Communication System (Phase 2+). Minimum performance requirements for noise suppressors used in AMR speech encoders 3GPP TS 06.77 (version 8.1.1, released in 1999) English standard name: Digital Cellular Telecommunications System (Phase 2+); Minimum Performance Requirements for Noise Suppressor Application to the AMR Speed Encoder Release date: 2001-03-01 Chinese Standard Classification Number: M12

. The performance of the suppressor has a significant impact on the analysis results. The common faults of suppressors are liquid leakage, resulting in a decrease in peak area (sensitivity) and an increase in background conductivity. 1. The main reasons for the decrease in peak area are: dehydration of the microfilm, leakage of the suppressor, poor solution flow path, and fouling of the microfilm. If the suppressor is not used, micro membrane dehydration may occur. To activate the suppressor, a syringe can be used to inject a small amount of 0.2mol/L sulfuric acid into the anion suppressor in the opposite direction of the eluent flow path; Use 0.2mol/L sodium hydroxide for cation. Simultaneously inject a small amount of deionized water into the inlet of the regeneration solution and let the suppressor stand for more than half an hour. The contaminated metal ions inside the suppressor can be cleaned with oxalic acid solution. 2. In the process of chemical inhibition conductivity detection and analysis, if the background conductivity is high, it indicates that there is a certain problem with the suppressor. Most of it is caused by improper operation. For example, if the flow path of the rinsing or regeneration solution is blocked, there is no solution flowing in the system, resulting in a high background conductivity, or if the current setting of the electrical suppressor used is too small, etc. After the membrane is contaminated, the exchange rate is prone to decrease and the background conductivity increases. The ineffective suppressor may experience a continuous increase in background conductivity during use, and a new suppressor should be replaced. 3. The main reason for liquid leakage in a leak suppressor is that the micro film inside the suppressor is not fully hydrated. Therefore, suppressors that have not been used for a long time should be allowed to hydrate and swell before use. Additionally, the outlet of the regeneration liquid should be smooth, as high back pressure can also cause the suppressor to leak. In addition, due to improper storage of the suppressor, the microfilm inside the suppressor may contract or rupture, leading to leakage

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100 inspection and testing process:

1. Telephone communication and confirmation of needs;

2. Recommend the plan and confirm the quotation;

3. Mailing samples and arranging testing;

4. Progress tracking and result feedback;

5. Issue reports and after-sales service;

6. If it needs to be expedited, priority processing;