GB/T 45369-2025Absorbent sanitary paper products and raw materials — Evaluation method of deodorant performance (English PDF)

3.1 Unpleasant odor

An unpleasant odor associated with people’s living environment.

NOTE. examples include the odor of excrement and body odor.

3.2 Chemical components of unpleasant odor

The main chemical components of unpleasant odor in people’s living environment.

3.3 Deodorant performance

The desired effect of reducing unpleasant odor in the surrounding air.

NOTE. deodorant performance can be expressed in ways including but not limited to odor purification and odor removal.

3.4 Evaluation of deodorant performance

Compared to a blank test without a specimen, the determination of the rate of reduction in the concentration of chemical components of unpleasant odor in a container containing a specimen.

6.2 Sampling bag. made of low-adsorbent polytetrafluoroethylene (PTFE) material, with

volumes of 2 L, 5 L and 10 L. The sampling bag is open at one end and equipped with a sealing device. The sealing device shall ensure a complete seal after the sample is placed in the sampling bag. The sampling bag shall be equipped with two PTFE straight-through valves.

Before use, the sampling bag shall be purified to ensure no interference from the analyte inside.

6.3 Syringes. glass syringes with capacities of 10 L, 50 L and 100 mL.

6.4 Detection tubes. devices for determining gas concentration, consisting of glass tubes filled

with particulate chemical substances that produce a color reaction with a specific gas, the color change being proportional to the concentration of the gas to be determined. The concentration of the chemical components of unpleasant odor can be read from the graduations printed on the surface of the glass tube. Specifically, the measuring range for ammonia detection tubes should be 0.2 L/L to 200 L/L; the measuring range for hydrogen sulfide detection tubes should be 0.2 L/L to 6 L/L; the measuring range for methanethiol detection tubes should be 0.25 L/L to 2.5 L/L.

6.5 Gas detector. equipped with a pump-suction sampling tube. Before use, the limit of quantitation shall be confirmed in accordance with GB/T 27417.The measurement range for ammonia is 0 L/L to 500 L/L, with a division value of at least 0.1 L/L; the measurement range for hydrogen sulfide is 0 L/L to 50 L/L, with a division value of at least 0.01 L/L; the measurement range for methanethiol is 0 L/L to 50 L/L, with a division value of at least 0.01 L/L.

6.6 Liquid chromatograph - mass spectrometer/tandem mass spectrometer. equipped with an

electrospray ionization source (ESI).

6.7 Gas chromatograph - mass spectrometer. the gas chromatograph part has split/splitless

injection ports and programmable temperature rise. The mass spectrometer part has a 70 eV electron impact (EI) ionization source, and functions including mass spectrum library, manual/automatic tuning, data acquisition, quantitative analysis, and library retrieval, etc.

6.8 Vacuum pump. capable of evacuating the gas from the sampling bag.

6.9 Flow meter. capable of accurately measuring gas flow rates of 0.1 L/min or higher.

6.10 Ground conical flask. 250 mL, equipped with a PTFE piston glass straight-through

evacuation connector with a ground glass joint.

6.11 Test bacterium. proteus mirabilis (CMCC 49005).

6.12 Shaking incubator. with a rotation speed range of 250 r/min ~ 300 r/min.

6.13 Thermostatic incubator. with a temperature control accuracy of  1 C.

6.14 Gas sampler. capable of accurately controlling the flow rate within the range of 0.1 L/min to 5.0 L/min.

6.15 Stopwatch. with a division value of 0.1 s.

6.16 U-shaped porous glass plate absorption tube. 10 mL.

6.17 Adsorption tube. made of stainless steel or glass tube with polished inner wall. The size of the tube shall match the thermal desorption instrument. One end of the sampling port of the adsorption tube shall be marked. The adsorption tube is pre-filled with 200 mg to 1,000 mg of 2,6-diphenylfuran porous polymer (Tenax TA) adsorbent. Before use, the adsorption tube shall be subject to an ageing treatment. After treatment, the peak area shall not exceed 10% of the typical peak area of the chemical compound to be determined. If this condition is not met, the adsorption tube shall be subject to an ageing treatment again. Adsorption tubes that still do not meet the requirements after repeated treatment shall not be used in the test. After treatment, the adsorption tube shall be stored in a sealed container at room temperature, with the tube opening sealed with a sealing cap, and tightly wrapped with tin foil or aluminum foil. The treated adsorption tube shall be used within 4 weeks; if it exceeds 4 weeks, it shall be re-treated.

6.18 Thermal desorption instrument. capable of performing two-stage thermal desorption on

the adsorption tube and introducing the desorbed gas into the gas chromatograph through an inert gas. Desorption temperature, time and carrier gas flow rate are adjustable. A cold trap can concentrate the desorbed sample.

6.19 Oven. capable of controlling the temperature at (37  2) C.

6.20 Analytical balance. with a division value of 0 0001 g.

6.21 Liquid standard series preparation device. standard gas chromatograph inlet, can be used

online or independently assembled, retains carrier gas at the inlet, and the lower end of the inlet can be connected to the adsorption tube.

6.22 Helium. with a purity of 99.999%. 6.23 Volumetric flask. 25 mL.

6.24 Quick-installation connector. a disposable quick-installation connector suitable for tandem

gas capillary chromatographic columns.