This part specifies the method to determine the distribution of particulate in the air of workplace.
This part is applicable to the determination of distribution of particulate in the air of workplace.
2. Normative References
The following standards contain provisions which, through reference in this standard, constitute provisions of this standard. For dated references, subsequent amendments to (excluding corrigendum) or revisions of, any of these publications do not apply. However, parties coming to an agreement according to this standard are encouraged to investigate whether the latest editions are applicable. For undated references, the latest edition of the standard referred to applies.
GBZ 159 “Specifications of Air Sampling for Hazardous Substances Monitoring in the Workplace”
3. Dissolving and Smear Filter Membranes
3.1 Principle
Dissolve perchloroethylene filter membrane collected with dust into organic solvent as dust particle suspension, and then make specimens out of it; measure the size of dust and count the dust particles under the microscope, and calculate the percentage of dust particles with different sizes.
3.2 Apparatus
3.2.1 Porcelain crucible or beaker: 25 mL.
3.2.2 Glass slide: 75mm×25mm×1mm.
3.2.3 Microscope.
3.2.4 Ocular micrometer.
3.2.5 Object micrometer: a standard measurement with the total length of 1mm and divided evenly into 100 scales, each division value being 0.01mm, namely, 10μm(See Figure 1).
GBZ/T 192.3-2007 The following standards are cited：
GBZ/T 192.3-2007 Cited by the following standards：
