摘要
采用流动注射分析技术 ,以酸碱指示剂———间硝基酚溶液作载流 ,实现了三元复合驱油体系中碱的测定 ;该法可测定10～600mg/LNaOH(强碱),20～1400mg/LNa2CO3(弱碱);方法的检出限为0.5mg/LNaOH ,1mg/LNa2CO3;对含量为200mg/L的样品测定6次的相对标准偏差为0.6%(NaOH) ,0.5%(Na2CO3);测定速率每小时达94个样 ;该法也适用于其它无机碱。
Determination of alkalinity in alkaline-surfactant-polymer flooding systems of displacement agent is realized by flow injection spectrophotometry with m-nitrophenol as a carrier and indicator. This method can be used for the determination of the sample containing sodium hydroxide in the range of 10～600 mg/L and sodium carbonate in the range of 20～1 400 mg/L with a sampling frequency of 94 samples per hour. The detection limit of 0.5 mg/L for sodium hydroxide and 1 mg/L for sodium carbonate are obtained. The relative standard deviation is 0.6%(ρ=200 mg/L, n=6)for sodium hydroxide and 0.4%(ρ=200 mg/L, n=7)for sodium carbonate. It is also suitable for the determination of some other inorganic bases and organic bases.
出处
《分析测试学报》
CAS
CSCD
北大核心
2002年第5期27-29,共3页
Journal of Instrumental Analysis
基金
国家"973"项目 (G1999022500)
