1. PHYSICAL PROPERTY INSPECTION

• Particle size allocation ratio: particle size is measured by mesh unit and based on particle size scope, particle size allocation ration is calculated by percentage unit
• Apparent density: Activated carbon is fulfilled on one volume unit
• Moisture: Mass reduction rate after drying one activated carbon at 115±5⁰C for 3 hours
• Evaporation rate: Mass reduction rate after drying one sample, being covered with lid and burned at 925⁰C for 7 minutes, then cooling
• Ass rate: The rate between residual ass after full burning of one dry sample and initial sample
• Hardness: Physical hardness index of activated carbon
• pH: pH index of activated carbon

2. INSPECTION OF ADSORPTION OF ACTIVATED CARBON

• Iodine adsorption capacity: Mass of iodine is adsorbed over one mass unit of activated carbon
• De-Methylene blue: Volume of Methylen blue is removed over 1 gram of activated carbon
• Saturated adsorption capacity of benzene: Saturated adsorption capacity of benzene over1 gram of activated carbon expressed in percentage.

3. INSPECTION OF PORE STRUCTURES

• Specific surface area: Measuring specific inner surface area over 1 gram of activated carbon using N2 and BET method
• Volume and allocation of pores: There are two ways to determine volume and radius of pores: Isothermal adsorption and mercury porosimetry
• Vision by electronic telescope: widely used to view state and structure of surface of solid particles
• X-ray analysis: State of crystal structure can be studied and radius of pore can be determined by diffusion strength method