GB/T 38504-2020Evaluation method of disinfection effect of spray disinfection (English PDF)

2.1 Spray disinfection

Through mechanical force or other modes of action, the disinfectant can form water droplets or atomize into aerosols, which can infect the surface of the object or the air.

Way of disinfection.

2.2 Confinedmovingsmalspace

A relatively closed environment with a volume less than or equal to 20m3.

3.1 Test group

Evaluation of spray disinfection effect includes laboratory test, simulated field test and field test. Laboratory tests are required and simulated field tests

And field test is optional.

3.2 Microbial killing indicators

3.2.1 Laboratory test killing microorganism indicators

See Table 1 for laboratory test microbiological indicators.

Table 1 Microbiological indicators for laboratory tests

Use range to indicate the logarithmic value of strain kill

Object surface disinfection

Staphylococcus aureus (ATCC6538) >= 3.00

E. coli (8099) >= 3.00

Pseudomonas aeruginosa (ATCC15442) >= 3.00

Air disinfection Staphylococcus aureus (8032) >= 3.00

If it is marked to have a killing effect on a specific microorganism, the killing test of the microorganism should be performed, and the killing logarithm value is greater than or equal to 3.00.

3.2.2 Microbiological indicators for simulated field tests

See Table 2 for indicators of simulated field tests to kill microorganisms.