Application of JCIC Titanium Dioxide Determination Method to Various Surface Treated Titanium Dioxide

Abstract

The JCIC test method of titanium dioxide which was stipulated for a part of titanium dioxide related materials was examined firstly to replace the zincamalgum method in the JSCI, and secondly to apply to other related materials including surface treated titanium dioxides with alumina, fatty acids and silicones. It was found to be an excellent replacement for the zincamalgum method with R. S. D. not more than 1%. It could also be applied without any modification to various surface treated titanium dioxides except the silicone treated ones. However, an ignition at 500° or 800° for 2 hours of the silicone treated ones led to a successful application, and this pretreatment (888°, 2 hours) could be a common method for any related materials including the cosmetic products such as foundations. A time required for dissolution in sulfuric acid could also be fixed at 2 hours, and this is thought to be a generalized condition in combination with the above ignition pretreatment.