Environment Quality Standard and Analytical Method

Substances Standards Analytical Methods
Sulfur Dioxide Daily average of hourly values shall not exceed 0.04 ppm, and hourly values shall not exceed 0.1 ppm. Conductometric method or fluorescence method
Carbon Monoxide Daily average of hourly values shall not exceed 10 ppm, and average of hourly values in eight consecutive hours shall not exceed 20 ppm. Nondispersive infrared analyzer method
Suspended Particulate Matter(*1) Daily average of hourly values shall not exceed 0.10 mg/m3 and hourly values shall not exceed 0.20 mg/m3. Light scattering method, piezoelectric microbalance method or Bertha-ray attenuation method
(Methods yielding values having a linear relation with the values of the weight concentration measuring methods based on filtration collection)
Nitrogen Dioxide Daily average of hourly values shall be within the range between 0.04 ppm and 0.06 ppm or below. Colorimetry employing Saltzman reagent (with Saltzman's coefficient being 0.84) or chemiliminescencs method using ozone
Photochemical oxidants(*2) Hourly values shall not exceed 0.06 ppm. Absorptiometry using neutral potassium iodine solution, or coulometry or chemiliminescencs method using etylene

Note;

  1. Suspended particulate matter are airborne particles 10 micrometers or less in diameter.
  2. Photochemical oxidants are ozone, peroxiacetyl nitrate and other oxidizers produced by photochemical reaction (those oxidizers which isolate iodine in a neutral solution of potassium iodide; however, nitrogen dioxide is excluded).

home back