重油试样在定碳硫的高温炉中燃烧,生成的气体用过氧化氢溶液吸收后,用氢氧化钠标准溶液滴定测硫。称重油0.1～0.2g 均匀分布在磁舟底部,试样上用酸洗石棉或细砂(经1200℃锻烧脱硫)覆盖。接受器中注入150ml 水,15ml 过氧化氢(30%)和7.0ml 0.02N 硫酸。将磁舟推入管式炉中离管口5～10cm 的低温处,预热5～10分钟,并同时通氧。以后逐渐移动磁管,使油样逐渐移至炉中高温处燃烧(一定要缓慢的移动,避免油样剧烈燃烧)共烧30～40分钟。在接受器溶液中加入4滴甲基红-次甲基蓝混合指示剂,用0.02N 氢氧化钠标准溶液进行滴定,终点 The heavy oil sample is burned in a high-temperature furnace set at a carbon-sulfur level. After the generated gas is absorbed by the hydrogen peroxide solution, the sulfur content is measured titration with a sodium hydroxide standard solution. Weighing oil 0.1 ~ 0.2g evenly distributed in the bottom of the magnetic boat, pickled asbestos or fine sand (1200 ° C calcined desulfurization) coverage. The receiver was filled with 150 ml water, 15 ml hydrogen peroxide (30%) and 7.0 ml 0.02 N sulfuric acid. The magnetic boat pushed into the tube furnace 5 ~ 10cm away from the nozzle at a low temperature, warm up for 5 to 10 minutes, and at the same time oxygen. After gradually moving the magnetic tube, so that the oil gradually moved to the furnace at high temperature combustion (must be slow to move, to avoid severe combustion of oil samples) co-burning 30 to 40 minutes. Add 4 drops of Methyl Red-Methylene Blue Mix Indicator in the receptor solution, titrate with 0.02N sodium hydroxide standard solution, and end