Acceptance of civil engineering, indoor air pollutants concentration testing point should be set according to the room area: 1. The room area 2. When the room area of 50 ~ 100 m set 2 testing point;3. The room area & gt;100 m 3-5 check points.Indoor air testing instruments: indoor air testing, formaldehyde detection is the main project, also including other toxic gases and pollutants endanger human body health, used in indoor environment testing instruments are mainly formaldehyde detector, air sampler (pump) and calibrator, particle counter, ammonia detector,
the ozone, voc detector, CO2 CO | | temperature and humidity detector, the radon gas detector, the dust meter, air quality tester, gas meter, etc.Indoor air detection: the detection method of formaldehyde., according to the national standard method for the determination of formaldehyde has four kinds: the first is a AHMT spectrophotometry, formaldehyde absorbed by absorbing liquid in the air,
in the alkaline solution and amino - 4-3 - hydrazine - 5 - sulfonium - three ammonia complex reaction of alum, potassium periodate oxidation to form red compound, colorimetric quantitative;The second is phenol reagent spectrophotometry, the formaldehyde in air with phenol reagent reaction, lamictal in acid solution by high iron oxide glaucous compound formation, according to the color depth,
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