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Ⅰ电炉中燃烧法本法为将硫铁矿样品在电炉内空气流中燃烧,反应如下: 2FeS_2+11O_2→Fe_2O_3+4SO_2 燃烧生成的气体,令其通过过氧化氢溶液,SO_2即被氧化,发生下列反应: SO_2+H_2O_2→H_2SO_4所生成之硫酸,可用鹼溶液滴定之。测定手续——测定时所需装置,如图所示。先在瓶子11中注入过氧化氢溶液以作吸收之用,并加苯酚红指示剂。滴定管12中装入鹼溶液,同时将电炉热至850°—900°。
Ⅰ Electric Furnace Combustion Method This method is to pyrite samples burned in the air flow in the electric furnace, the reaction is as follows: 2FeS_2 11O 2 → Fe 2 O 3 + 4 SO 2 combustion gas generated, so that the hydrogen peroxide solution, SO 2 is oxidized, occurs The following reaction: Sulfur dioxide generated by SO 2 + H 2 O 2 → H 2 SO 4 can be titrated with alkali solution. Measurement procedures - the required measurement device, as shown. Hydrogen peroxide solution is first injected into bottle 11 for absorption and phenol red indicator is added. The burette 12 is filled with an alkali solution while the electric furnace is heated to 850 ° -900 °.