富氧天然气火焰原子吸收光谱法测定油田水中的钡含量  

Measuring Barium Content in Oil Field Water by Oxygen-Enriched Gas Flame Atomic Absorption Spectrometry

作　　者：杨贝[1,2] 赵月龙[1] 焦玉海[1] 靳海波[1] 

机构地区：[1]北京石油化工学院化工系,北京102617 [2]北京化工大学理学院,北京100029

出　　处：《石油化工》2013年第12期1393-1397,共5页Petrochemical Technology

摘　　要：建立了一种富氧天然气火焰原子吸收光谱法,确定了实验参数和原子化气的流量,考察了溶液pH对钡含量测量结果的影响,得到了适宜的工作条件,并用该方法测定了油田水中的钡含量。得到的工作条件为:测定波长553.6 nm,灯电流6mA,狭缝宽度0.2 mm,燃烧器高度7 mm,空气流量0.25 m3/h,天然气流量0.18 m3/h,氧气流量0.18 m3/h。采用该方法测定水溶液中的钡含量时,灵敏度为6.29 mg/L(1%吸收),检出限为0.07 mg/L,相对标准偏差为2.99%。在待测溶液中添加二乙基三胺五乙酸,在pH=12的条件下,该方法可准确地测定模拟油田水样中的总钡含量,灵敏度为6.77 mg/L(1%吸收),检出限为0.06 mg/L,相对标准偏差为1.63%;与采用该方法测定水溶液中的钡含量相比,精密度升高。An oxygen-enriched gas flame atomic absorption spectrometry was established,which could be used to measure the barium content in oil field water.The experiment parameters and atomized gas flow were determined.The effect of solution pH on the measuring of barium content was investigated and appropriate measuring conditions were obtained as follows：air flow 0.25 m3/h,natural gas flow 0.18 m3/h,oxygen flow 0.18 m3/h,slit width 0.2 mm,burner height 7 mm,lamp current 6 mA and measuring wavelengh 553.6 nm.When this method was used in aqueous solution,the sensitivity,detection limit and relative standard deviation were 6.29 mg/L（1％ absorption）,0.07 mg/L and 2.99％,respectively.The method can be used to accurately measure the barium content in simulated oil field water in the presence of diethylene triamine pentaacetic acid under the condition of solution pH 12,with detection limit 0.06 mg/L,relative standard deviation 1.63％ and sensitivity 6.77 mg/L（1％ absorption）.

关 键 词：富氧天然气原子吸收光谱法 油田水 钡含量 

分 类 号：TE133.2[石油与天然气工程—油气勘探]