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Heritage Science

Table 1 Guideline values for the maximum allowable concentrations of pollutants in museums (in µg/m3)

From: Indoor air pollutants and their seasonal monitoring in European museums

 

General collections [1]

Sensitive collections [1]

General collections [29]

Long-term storage [30]

Acetic acid

100–700

12.5

1000

2500 (250 for sensitive materials)

Formic acid

10–40

9.5

–

1000

Formaldehyde

12.5–25

0.1–6

–

375

Acetaldehyde

–

2–37

–

–

NO2

4–20

0.1–5

10

20

SO2

1–5

0.1–1

–

3

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