1)Free acid:<=0.15% 2)Moisture: <=12.0% 3)High ... via burning oil & asphalt approach),%≥95Activity(NaAc approach)≥180Free acid (H2SO4),%≤0.15Water content before leaving factory,%≤12.0Granularity(over ... the harmful pigment,aflatoxin,phosphatide,saponin,colloid,and cotton acid from the oil to make it high-grade edible ... moisture due to its high water absorption ability. acid activated clay for corn oil