What kind of instrument test report is reliable?

With the improvement of people's quality of life and the enhancement of environmental protection awareness, it has become a fashion to test the indoor environmental quality of the house after the renovation of the new house. However, the endless stream of testing agencies and dazzling arrays of testing products on the Internet are dazzling. 'What kind of air testing data is reliable? Is there an authoritative indoor air testing agency in Ningbo?' No, the netizens who have just finished decorating their new home, 'Big face is wisdomThe doubts in my mind.　　 This consultation has attracted much attention. In just a few days, the number of clicks has exceeded 30,000.　　The simple instrument is not credible　　The results issued on site are fake　　Enter the keyword 'home air detection' on the e-commerce platform, and there are tens of thousands of products searched out. There are everything from test strips worth a few dollars to a detector worth tens of thousands of dollars.　　 How accurate are these detection methods and equipment? I learned from practice. Last week, I bought a popular simple tester on the Internet and rented a 'high-precision' tester for a small test.　　 Due to the limited conditions, only the formaldehyde content value is selected. The site of the experiment was in the new home of netizens 'big face is wisdom'. The experiment preparation is 'the master bedroom is sealed 12 hours in advance'. Regrettably, the final result makes people see the flowers in the fog: 　　 From the test situation in the bedroom, the result of the high-precision detector is 0.04mg/m3, and the formaldehyde concentration meets the indoor air quality of GB/T18883-2002 ≤0.10mg/ The m3 standard requires, but the simple tester results in 0.145mg/m3, which is 3.6 times the value detected by the high-precision tester.　　 In the wardrobe where everyone generally feels that the formaldehyde content is high, the value has changed dramatically. The simple detector is 0.066mg/m3, which is even lower than the bedroom.　　 On the Internet and major forums, there are also many private inspection companies that claim to be 'professional,' 'accurate,' and 'fast'.　　 contacted one of them at random, and the reception staff said openly that they would send professionals to bring equipment to the door to detect the content of formaldehyde, benzene, TVOC and other harmful gases in the home. 200 yuan a point, starting at 2 points. The test results can be given on site. 'Such a testing agency, please consider it.' The staff of Ningbo Environmental Protection Bureau said that at present, indoor air testing generally requires taking air samples on site and sending them back to the laboratory for precise measurement and parameter analysis. The final result must be experienced. A few working days. If you need to get results on the spot, you can't do it.　　CMA mark is provided. 　　Test data is considered reliable.　　So, what kind of indoor air test is reliable? The expert’s reply is: with the CMA mark.　　 According to the State Administration of Quality Supervision, Inspection and Quarantine, CMA is the abbreviation of 'ChinaMetrologyAccreditationFor indoor air testing, CMA has two meanings: first, only the testing organization that has obtained the certificate of measurement certification can use the CMA mark on the inspection report; second, the inspection report with the CMA mark can be used for judicial identification, and has legal validity.　　 It is understood that the CMA certification qualification needs to be issued by the quality supervision department. This measurement certification has very clear requirements for the qualifications of the testing personnel of indoor air testing institutions and laboratories.　　 Whether a testing organization has CMA measurement certification, and whether this certification is within the validity period, you can check on the government's website.　　Qualified testing agencies　　Ningbo now has 12 　　Because the CMA measurement certification requirements are relatively high, there are not many third-party indoor air testing agencies that have this certification in Ningbo. At present, there are 12 registered with Ningbo Environmental Protection Bureau. The 'Ningbo City Social Environmental Testing Organization Management Measures (Trial)' (Yonghuanfa [2014] No. 50) stipulates that there should be professional laboratories suitable for indoor air testing business projects within Ningbo, and the area shall not be less than 500 square meters. Meters, and the registered assets of equipment and equipment should be no less than 3 million yuan.　　 The Ningbo Municipal Environmental Protection Bureau publicized the registration and filing status of social environmental testing agencies on Shanghai. All 12 testing units can be found in the 'Environmental Protection Column' on the EPA's homepage.　　 The staff of the Ningbo Environmental Protection Bureau reminded that you can not only ask to check the 'CMA' certificates of these companies, but also check the scope of the tests and whether the certificates are within the validity period before conducting the test.
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