TESTING 7.1 The following tests shall be carried out according to the Gulf standard mentioned in (2.1). 7.2 The following tests shall be carried out on the samples taken according to item (4). 7.2.1 Visual inspection . 7.2.2 Thermal stability test. 7.2.3 Determination of pH value. 7.2.4 Determination of the total content of fatty substance. 7.2.5 Determination of water content 7.2.6 Bacterial (Microbiological) count test 8. MARKING GULF STANDARD GS 1152/20023