Descriptors | Specimen preparation, Shape, Density, Testing conditions, Mineral fibres, Equations, Confidence limits, Particulate air pollutants, Counting, Calibration, Asbestos, Working range, Ash determination, Electron microscopes, Length, Width, Test equipment, Sensitivity, Classification systems, Bibliography, Reports, Air, Aspect ratio, Poisson distribution, Performance, Toxic materials, Identification methods, Filtration, Concentration (chemical), Test specimens, Interferences (chemical), Determination of content, Amphiboles, Mathematical calculations, Sampling methods, Air pollution, Microscopic analysis, Sampling equipment, Fibres, Dimensional measurement |