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BEMMA: Assessment of emissions from materials for museum equipment
1. Methods of analysis
  1. Micro chamber (μ-CTE)
  2. DIN ISO 16000-6 (sample taking with Tenax®; VOCs, SVOCs; 0,25 liters withdrawal volume; 10 min)
  3. DIN ISO 16000-3 (sample taking with DNPH- cartridges for aldehyde and ketone; VVOCs, VOCs, SVOCs)
  4. Formic and acetic acid BAM specific analytic process referring to DIN ISO 16000-3; (derivating, LC-MS; 30 liters withdrawal volume; 20 h)
  5. Iso-cyanate (derivatisation, HPLC; 15 liters withdrawal volume; 10 h)
  6. Anorganic gases (sensors and optical measuring devices within the scope of 0 to 250 ppm)
2. Criteria
  1. Substances with high contamination potential, such as formic acid, acetic acid, formaldehyde, H2S, SO2, NH3; 2,6-TDI, HDI, 2,4-TDI and oxime (s. table 2) must not be detectable
  2. Sum emission figures for Σ VVOCs: 100 μg/m³, Σ VOCs: 500 μg/m³ with the exception of sealing materials with Σ VOCs: 2000 μg/m³ due to significantly smaller application surface, for Σ SVOCs: 100 μg/m³ and anorganic gases (planned)

3. Assessment

All listed conditions must be reached. In case of any emission figure exceeded, the product fails the BEMMA* scheme.

Table 1: BEMMA scheme

Sum values for VOCs at room temperature for individual display case construction materials

Emission figures (< detection limit) for substances with high contamination potential

Substances:Detection limit in μg/m³:Analytic process
Formic acid25BAM specific process, referring to DIN ISO 16000-3
Acetic acid50BAM specific process, referring to DIN ISO 16000-3
Formaldehyde2DIN ISO 16000-3
2,6-TDI2OSHA² method number 42 for DIISOCYANATES
HDI2OSHA² method number 42 for DIISOCYANATES
2,4-TDI1OSHA² method number 42 for DIISOCYANATES
Oxime5 (Toluene equivalent)DIN ISO 16000-6