E-dust

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In the Technical Rules for Hazardous Substances ( TRGS ), e-dust is the mass fraction of the dust whose particles are so small that they can be absorbed through the respiratory tract when inhaled. The terms inhalable dust , E-fraction , inhalable fraction or inhalable dust fraction are also used synonymously instead of E-dust . The term e-dust is the more common one and is also used. a. used by government agencies such as BAuA , the statutory accident insurance DGUV , occupational safety institutions such as IFA and professional associations such as BGBau . In the GESTIS substance database , the expression inhalable aerosol fraction is also used. E-dust is essentially identical to the previous designation total dust . In Switzerland the term inhalable dust is used.

Measurement of e-dust in the workplace

Conventions according to EN 481

The measurement and assessment of possible dust exposure at a workplace, including the E-dust fraction, is regulated by TRGS 402. First of all, it is considered whether inhalation exposure can occur, i. H. whether hazardous substances such as dusts are present in the breathing area of ​​the employee and in what period they can occur. If it is not possible to safely avoid hazardous dusts in the breathing air, the dust exposure must be determined using suitable measuring devices which, among other things, must comply with the regulations of EN 481 and EN 482. The inhalable dust is determined based on EN 481 as an inhalable fraction , which should come as close as possible to the fraction that "gets into the various areas of the respiratory tract under average conditions".

Limit values

The individual occupational exposure limit values ​​(shift average for a daily working time of 8 hours and a 5-day week over the working life) for substances or substances are regulated in TRGS 900. The limit values ​​specified there reflect the current state of knowledge about their hazard potential. Unless otherwise explicitly specified for a substance or substance, the general dust limit value specified there has been in effect since February 14, 2014 . This is for the E-dust fraction at 10 mg / m³, while z. B. for soluble barium compounds (which are classified as toxic) an E-dust limit value of 0.5 mg / m³ is set. It is permissible for the exposure peak during a shift for a period of up to 15 minutes to exceed the limit value by up to two times (excess factor of 2) as long as the shift mean value complies with the limit value.

literature

  • DIN EN 481: 1993-09 workplace atmosphere; Determination of the particle size distribution for the measurement of airborne particles (German version EN 481: 1993), Beuth Verlag, Berlin.
  • DIN EN 482: 2012-06 Exposure at work - General requirements for the performance of methods for measuring chemical agents; German version EN 482: 2012, Beuth Verlag, Berlin.

Individual evidence

  1. ↑ a b Technical rule for hazardous substances 559 Mineral dust. (pdf) Federal Institute for Occupational Safety and Health, March 3, 2015, p. 2 , accessed on April 10, 2015 .
  2. ↑ a b Justification for the general dust limit value (2014/2001) in TRGS 900. (pdf) Federal Institute for Occupational Safety and Health, November 2013, pp. 4.12-22 , accessed on April 10, 2015 .
  3. ↑ a b Technical Rule for Hazardous Substances Occupational Exposure Limits TRGS 900. (pdf) Federal Institute for Occupational Safety and Health, March 3, 2015, p. 5 , accessed on April 10, 2015 .
  4. ^ German statutory accident insurance: Definition of E-Dust
  5. ↑ Search results for inhalable dust fraction on the IFA website
  6. ↑ Technical rule for hazardous substances 559 Mineral dust. (pdf) (No longer available online.) BG Bau, January 2010, archived from the original on April 13, 2015 ; Retrieved April 10, 2015 . Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice. @1@ 2Template: Webachiv / IABot / www.bgbau.de
  7. ↑ Limit values ​​at the workplace: MAK / BAT values ​​(explanations), physical effects, physical stress. Retrieved July 25, 2019 .
  8. ↑ Technical Rule for Hazardous Substances 402 Determination and assessment of the dangers involved in activities involving hazardous substances: Inhalation exposure. (pdf) Federal Institute for Occupational Safety and Health, March 3, 2015, accessed on April 10, 2015 .
  9. ↑ German statutory accident insurance: Limit values ​​for dust