电感耦合等离子体原子光谱法间接测定油田污水中硫离子

Indirect Determination of Sulfur ions in Oilfield Sewage by Inductively Coupled Plasma-Atomic Emission Spectrometry

油田水驱采出污水中硫元素的含量较高,各区块中的还原性物质硫化物是曝氧工艺除去的主要元素,其对聚合物粘度的影响较大,直接影响原油采收率,是油田水驱污水处理和配聚用水处理的主要对象。本研究建立了电感耦合等离子体原子发射光谱法（ICP-AES）测定Fe^2＋间接测定水驱污水中S^2-的方法。通过加入过量Fe^2＋,使S^2-生成FeS沉淀,用脱脂棉过滤,以ICP-AES测定滤液中剩余的Fe^2＋,差减法间接测定污水中S^2-的含量。本法简便、准确快速,线性范围宽,回收率在96.9%-98.7%之间,相对标准偏差为2.15%。并对南阳油田实际污水中还原性硫离子进行了测定。

A method was established for the indirect determination of sulfide by inductively coupled plasmaatomic emission spectrometry （ICP-AES）. By joining excessive known Fe^2 ＋ , the FeS precipitation was filtrated by fat-free cotton. Then the remaining iron ion in filtrate was determined by ICP-AES. It has been applied to the determination of sulfide in oilfield sowage. The recovery of standard addition is 96.9% -98.7%, the relative standard deviation is 2.15%. The method is simple, accurate and rapid.