Application of methane non methane total hydrocarbon analyzer in the environment

Execution standards for gas chromatography:

GB/T18883-2002 "Indoor Air Quality Standards"

GB/T 11737 Hygienic inspection standard method for atmospheric neutral xylene in residential areas - Gas chromatography method

GB/T 14677 Air Quality - Determination of Toluene, Xylene, and Styrene - Gas Chromatography Method

GB/T 15439 Determination of Benzo (a) Flower in Environmental Air - High Performance Liquid Chromatography Method

National Standard for Indoor Air Quality GB/T18883-2002

Non methane total hydrocarbon analyzer for methane in the environmentApplication of air quality testing projects:

Sulfur dioxide SO2 0.50mg/m31h mean

Nitrogen dioxide NO2 0.24mg/m31h mean

Carbon monoxide CO 10mg/m3 10 mean

Daily average value of carbon dioxide (CO2) at 0.10%

Ozone O3 0.20mg/m3 1-hour mean

Ozone O3 0.16mg/m3/31h mean

Formaldehyde HCHO 0.10mg/m3 1-hour mean

Benzene C6H6 0.1mg/m3 1-hour mean

toluene 0.20mg/m3 1-hour mean

xylene 0.20mg/m31h mean

Benzo [α] pyrene B (α) P 1.0mg/m3 daily average value

Inhalable particulate matter PM10 0.15mg/m3 daily average

Total volatile organic compounds (TVOC) 0.60mg/m3 8h mean

biological cfu 2500cfu/m3 according to instrument specifications

radioactivity Radon 222RN 100Bq/m3 annual average

In the environmentCode for Indoor Environmental Pollution Control of Civil Building Engineering GB50325-2010

Jointly issued by the Ministry of Housing and Urban Rural Development of the People's Republic of China and the General Administration of Quality Supervision, Inspection and Quarantine (implemented on June 1, 2011)

Note: Class I buildings: residential buildings, hospitals, senior buildings, kindergartens, school classrooms, etc

In the environmentcentreDetermination of Sampling and Testing Points

When the usable area of the room is less than 30 square meters, the number of detection points is 1;

When the usable area of the room is ≥ 30 square meters and<60 square meters, the number of detection points is 2;

When the usable area of the room is ≥ 60 square meters and<100 square meters, the number of detection points shall not be less than 3.

Testing precautions:

1. During the closed process and detection process

Do not engage in activities that affect test results, such as smoking and using gas stoves.

2. The testing site requires

Clean thoroughly and do not stack any residual paint, paint, boards, etc.

3. During the closed process and detection process

Do not use chemical products, such as air fresheners, perfume, etc.

4. During the testing process

Try to close the doors of each room as close as possible and do not maintain ventilation.

5. Before personnel conduct indoor environmental testing

You should request the testing personnel to present the corresponding professional qualification certificate and verify whether the photo on the certificate is their own, otherwise you can refuse the testing personnel to conduct the test.

6. The total number of testing personnel and other personnel during the testing process

No more than 3 people are allowed, and efforts should be made to minimize the impact of personnel activities on the testing.