This part of ISO 6326 specifies a method for the determination of total Sulfur in natura1 gas. The method is applicable to gases with Sulfur contents between 0,5 mg/m3 and ‘l 000 mg/m3. With a total Sulfur content of more than 0,l mg Sulfur in the absorption Solution, visual titration with an indicator tan be Chosen, whereas for lower contents turbidimetric titration is preferable. NOTE - In all Parts of ISO 6326, 1 m3 of gas is expressed at normal conditions (0 OC; 101,325 kPa).