Public bathtub water and swimming pool water testing

This part of GB/T 18204 specifies the determination method for chemical pollutants and urea in pool water in indoor air of public places. This section is applicable to the determination of chemical pollutants in indoor air and urea in pool water in public places. Other indoor environments such as places and living rooms can be referred to for implementation. Note: If there are two or more testing methods for the same indicator in this section, it can be selected and used according to the technical requirements, but the first brain is the quick cut method. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 11742 Standard Method for Hygienic Examination of Hydrogen Sulfide in the Atmosphere of Residential Areas - Methylene Blue Photometric Method - GB/T 14669 Determination of Ammonia in the Air - Ion Selective Electrode Method - GB/T15438 Determination of Ozone in the Air - Ultraviolet Photometric Method - GB/T16129 Standard Method for Hygienic Examination of Formaldehyde in the Atmosphere of Residential Areas - Spectrometric Method - GB/T 18883-2002 Indoor Air Quality Standard 3- Carbon Monoxide 3.1 Non spectrophotometric Infrared Analysis Method 3.1.1: Principle: Carbon Monoxide Has Selectivity for Infrared Radiation Sexual absorption. Within a certain range, the absorption value is linearly related to the concentration of carbon monoxide, and the concentration of carbon monoxide in the sample can be determined based on the absorption value. 3.1.2 Reagents and materials 3.1.2.1 Discolored silica gel: dry at 120 ℃ for 2 hours. 3.1.2.2 Calcium fluoride: analytically pure. 3.1.2.3 Commercial pure nitrogen: purity 99.999%. 3.1.2.2.4: Hopcalite oxidant: mainly composed of 60% manganese oxide (MnO) and 40% copper oxide (CuO), 830 pm~l 0o0 pam particles, which should be kept dry during use and storage. 3.1.2.5 Carbon monoxide standard gas (stored in aluminum alloy bottles): uncertainty less than 1%. 3.1.3.3 Instrument 3.1.3.1 Non dispersive infrared carbon monoxide gas analyzer: - Measurement range: 0.125 mg/rn *~62.5 mg/tn "- Reproducibility: ≤ 1% of full scale

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