论文部分内容阅读
本文探讨了氢氧化钍共沉—石墨炉原子吸收法定量测定原油中微量铅的方法,并测定11种原油中的铅含量,回收率平均值为98％。 量取约10克原油于耐热烧杯中,加5毫升硫酸,用玻璃棒充分搅拌混合。在热板上逐渐加热炭化到不出现硫酸的白烟,在500℃电炉内灰化,灰分用硝酸(1:2)5毫升加热溶解,加离子交换水50毫升、钍溶液(10毫克/毫升,以特级硝酸钍的四水化合物2.38克溶于
In this paper, the method of quantitative determination of trace lead in crude oil by thoron hydroxide co-precipitation-graphite furnace atomic absorption spectrometry was studied. The lead content in 11 crude oils was determined. The average recovery was 98%. Weigh about 10 grams of crude oil in a heat-resistant beaker, add 5 ml of sulfuric acid, with a glass rod full mixing. On the hot plate is gradually heated charring to white smoke does not appear sulfuric acid, ashing in an electric furnace at 500 ℃, the ash is dissolved with 5 ml of nitric acid (1: 2), heated with 50 ml of ion exchange water, thorium solution (10 mg / ml , With 2.38 grams of premium nitric acid thorium tetrahydrate compound dissolved