提高轻烃回收率的方法

针时负压法油稳定装置原设计不配套、轻烃回收率较低等问题,完善了原油稳定配套工艺,提高了轻烃回收率。通过增加外冷却系统,解决了原系统冷却量不足的问题;通过对原油稳定塔进行改装,采用尾气气提技术,提高了稳定塔效率,改善了压缩机的运行状况;通过采用进塔温度控制、系统参数调控和生产工艺流程合理调配等方法,提高了轻烃回收率和综合效益。     

A smart simple spectrophotometric method for simultaneous determination of binary mixtures

A new simple spectrophotometric method was developed for the simultaneous determination of drugs with interfering spectra in binary mixtures without previous separation. The new method is based on a si...     

混合动力汽车再生制动对能耗的影响

基于某地面耦合型油电混合动力汽车,研究再生制动对整车能耗的影响,为进一步开发混合动力汽车的制动能量管理策略奠定基础。通过新欧洲驾驶循环(New European Driving Cycle,NEDC)工况再生制动过程分析,研究发动机启停控制、电池荷电状态(State of Charge,SOC)对再生制动回收能量的影响,采用单次NEDC循环工况再生制动能量回收效率来评估再生制动控制策略对整车能量消耗的影响。测试结果表明,再生制动过程发动机的启停控制主要受电池SOC的影响,电池SOC越低,发动机启动时刻越提前,停机时刻越延迟,再生制动回收的能量越多,单次循环工况制动能量回收率越高。     

用石墨炉原子吸收光谱法测定血中微量元素铅

用石墨炉原子吸收光谱法测定血液中的Pb，选用0.5％柠檬酸＋0.5mg/ml钯=1＋1（V＋V）为血铅测定的基体改进剂，其方法简便、快速，回收率为90-105％。     

美国废旧轮胎回收率达77％

根据美国橡胶生产者协会(RMA)近日的报告称，美国超过75％的废旧轮胎已被回收利用。此外，美国的国家净化规划和现行规定将继续减少贮存的旧轮胎。     

Chemiluminescence determination of melamine with Luminol-K3Fe（CN）6 system

A sensitive chemiluminescence（CL） method was developed for determining melamine in urine and plasma samples based on the fact that melamine can remarkably enhance the chemiluminescence of Luminol-K3 Fe（CN）6 system in alkaline medium. The determination con     

RP-HPLC method for the simultaneous determination of daidzein,genistein and formonetin in Solanum Lyratum Thunb

A rapid method for the simultaneous determination of daidzein, genistein and formonetin in solanum Lyratum Thunb by high performance liquid chromatography (HPLC) was developed. Separation was achieved on a Diamonsil C18 column (250 mm×4.6 mm, 5 μm) with isocratic elution, using a mobile phase of methanol-tetrahydrofuran-water (44∶3∶53, v/v). The wavelength was set at 260 nm and column was maintained at 35 ℃. The linear ranges of daidzein, genistein and formonetin were 1.0-40.0, 0.1-4.0 and 0.1-4.0 μg/mL, respectively. The average recoveries were between 98.4% and 101.3%. This method could be used for the quality control of Solanum lyratum Thunb due to its simplification, reliability, rapidity and excellent precision.     

反渗透技术对劣质水的应用研究

通过改善操作条件，如调节ｐＨ值、加磷酸盐和降低回收率等措施，解决了反渗透在应用于劣质水处理方面的关键技术问题．     

不同品牌DNPH管对车内醛酮类化合物测试影响的研究

研究了二硝基苯肼（DNPH）管的背景值，重点探讨了不同品牌DNPH管对甲醛、乙醛和丙醛回收率的影响以及同一品牌DNPH管对不同醛类物质回收率的影响，与采样条件对醛类物质收回率的影响，发现不同品牌对甲醛和乙醛的回收率影响较小，但对丙烯醛的回收率影响较大，同样，不同采样条件对甲醛和乙醛的回收率影响较小，对丙烯醛的回收率影响较大。