GB/T 18204.2-2014 in English

《GB/T 18204.2-2014公共场所卫生检验方法 第2部分：化学污染物》由628（国家疾病预防控制局）归口，主管部门为国家疾病预防控制局。
GB/T18204的本部分规定了公共场所室内空气中化学污染物和池水尿素的测定方法。
本部分适用于公共场所室内空气中化学污染物和池水尿素的测定。其他场所、居室等室内环境可参照执行。
注:本部分中同一个指标如果有两个或两个以上检验方法时,可根据技术条件选择使用,但以第一法为仲裁法。

1 Scope

This part of GB/T 18204 specifies the method for determination of chemical pollutants in indoor air and urea in pool water in public places.
This part is applicable to the determination of chemical pollutants in indoor air and urea in pool water in public places. Indoor environment in other sites and bedrooms, etc. may also refer to the provisions of this part.
Note: If two or more examination methods are available for the same parameter in this part, specific method may be selected according to technical conditions, but Method I shall be the referee method.

2 Normative References

The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 11742 Standard Method for Examination of Hydrogen Sulfide in Air of Residential Areas - Methylene Blue Spectrophotometric Method
GB/T 14669 Air Quality - Determination of Ammonia - Ion Selective Electrode Method
GB/T 15438 Ambient Air - Determination of Ozone - Ultraviolet Photometric Method
GB/T 16129 Standard Method for Hygienic Examination of Formaldehyde in Air of Residential Areas - Spectrophotometric Method
GB/T 18883-2002 Indoor Air Quality Standard

3 Carbon Monoxide

3.1 Nondispersive infrared analysis method
3.1.1 Principle
Carbon monoxide will selectively absorb infrared rays. Within a certain range, absorption values form a linear relationship with the concentration of carbon monoxide. The concentration of carbon monoxide in sample may be determined according to the absorption values.
3.1.2 Reagents and materials
3.1.2.1 Allochroic silica gel: dry for 2h at 120℃.
3.1.2.2 Calcium chloride: analytically pure.
3.1.2.3 High-purity nitrogen: purity of 99.999%.
3.1.2.4 Hopcalite oxidant: main components are 60% of manganese oxide (MnO) and 40% of copper oxide (CuO), 830μm~1 000μm particles; keep dry in the process of application and storage.
3.1.2.5 Carbon monoxide standard gas (stored in aluminum alloy bottle): uncertainty<1%.
3.1.3 Instruments

Foreword i
1 Scope
2 Normative References
3 Carbon Monoxide
4 Carbon Dioxide
5 Inhalable Particulate Matter PM
6 Fine Particulate Matter PM
7 Formaldehyde
8 Ammonia
9 Total Volatile Organic Compound
10 Benzene
11 Methylbenzene and Dimethylbenzene
12 Ozone
13 Urea
14 Hydrogen Sulphide
Appendix A (Normative) Requirements for On-site Sampling / Inspection Location
Appendix B (Normative) Determination of Relative Error Related to Mass Concentration Conversion Coefficient and Overall Uncertainty
Appendix C (Normative) Conditions of Portable Gas Chromatographic Analysis