【摘要】 行业标准《原油盐含量测定法(电量法)》(SY/T 0536—2008)中取样方式容易造成油层下部的水醇抽提液夹带油滴或油渍，使盐含量测定结果准确度和精密度变差。通过聚醚砜或聚四氟乙烯滤膜针头过滤器，或用管盖一体的细管预置离心管，分层后用12 cm特制长针头插入并刺穿细管底部膜封方式取样，可有效避免水醇抽提液中油污；同时使用50 mL聚丙烯离心管，使油样取样量增大约5倍，油样代表性提升，相应增大抽提液用量，方便盐含量不同检测方法的选用。更多还原

【Abstract】 The sampling method of the industry standard “Determination of salt content in crude petroleum—Coulometric titration method”(SY/T 0536—2008) is prone to entrap oil droplets or oil stains in the water alcohol extraction solution under the oil layer, which makes the accuracy and precision of the determination result worse. The oil contamination can be effectively avoided in the water alcohol extraction solution through the sampling methods using a polyethersulfone or polytetrafluoroethylene membrane needle filter, or using a centrifuge tube with an integrated tube cover for layering and using a 12 cm special long needle to insert and puncture the membrane seal at the bottom of the thin tube subsequently. At the same time, the sampling amount is increased by about 5 times, the representativeness of oil sample is improved, and the amount of extraction solution is increased accordingly to facilitate the selection of different detection methods for salt content.更多还原