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Working Environment Measurement Standards
Ministry of Labour Notification No. 46 of April 22, 1976

Latest Amendments:
Ministry of Health, Labour and Welfare Notification No. 191 of April 27, 2001
作業環境測定基準：原文

Definition

Article 1.In this notification, the definition of terms listed in the following items shall be as specified in each item concerned :

  1. Liquid absorption sampling method: This method is such that an amount of sample air is passed through or contact with the surface of a liquid absorbent, and by that process substances to be measured are gathered into the liquid by solution, reaction or other mechanisms with the liquid.
  2. Solid adsorption sampling method : This method is such that an amount of sample air is sucked through a layer of solid sorbents and substances to be measured are caught by those solid particles by adsorption etc.
  3. Direct sampling method : This method is such that an amount of sample air is directly collected into a collecting vessels such as bag or bottle without using such methods as dissolution, reaction, adsorption, etc.
  4. Cooling condensation sampling method : This method is such that an amount of sample air is condensed by being brought to contact with the surface of a cooled pipe, etc., and substances to be measured are gathered by condensation.
  5. Filtration sampling method : This method is such that an amount of sample air is sucked through a fitter (limited to such a filter capable of collecting more than 95% of particles of 0.3 micron) and substances to be measured are gathered by filtration.
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