连续流动分析仪测定水中总氮的特性研究

运用AA3连续流动注射分析仪测定水中总氮,测试了仪器的示值误差、重复性、稳定性等相关特性指标,由检测数据可以得出该方法线性关系好,精密度和准确度高,检出限低,加标回收率为93%-104%,与传统的碱性过硫酸钾消解—紫外分光光度法相比,该方法具有分析速率快、试剂消耗量低等优点,适用于环境监测分析工作。     

水中NH_3-N的流动注射在线分析

将流动注射应用于水中氨氮的分析,并研究了各种实验条件对于结果的影响。经实验证明:这种方法基本不存在干扰,线性范围0.1～10mg/L(以峰高定量),5～50mg/L(以峰宽定量),最低检出限为0.05mg/L,对于饮用水和污染水的在线分析有很好的结果。     

一种油田注水缓蚀剂的合成与性能评价

以不同长链脂肪酸、四乙烯五胺为原料合成油田注水缓蚀剂,通过正交试验筛选了最优合成条件。采用静态挂片法评价了产品的缓蚀性能,并考察了用量、温度对其缓蚀性能的影响。结果表明,试验条件下此类缓释剂在用量800mg/L、相对低温的条件下缓蚀效果较好。     

电子产品高加速应力筛选的应用探讨

本文论述了电子产品高加速应力筛选试验的流程和方法,包括高加速应力筛选试验剖面设计和筛选验证等,并将该试验方法在某机载惯导产品进行了应用。这一方法对于其他机载电子产品的高加速筛选工作有一定的指导意义。     

土壤中氰化物的快速测定——以江苏镇江电镀园区土壤监测为例

以电镀园区为例,利用流动注射仪对园区土壤中的氰化物进行了快速测定,并与传统分光光度法进行了比对.结果表明：流动注射法中准确度和精密度均满足监测要求;pH为3.8、蒸馏温度为125℃是氰化物测定的最佳实验条件;流动注射法和传统方法测试的结果相对标准偏差（RSD）均小于8％.该法具有分析速度快、稳定性好等特点,适用于大批量土壤样品测定.     

高压共轨主喷射时刻对柴油/甲醇双燃料发动机燃烧和排放的影响

在一台四冲程六缸增压中冷的高压共轨柴油机上采用进气总管喷射无水甲醇的方式进行柴油/甲醇组合燃烧实验(DMCC).通过改变共轨柴油喷射的主喷射时刻以及甲醇的喷射量,对柴油机燃烧和尾气排放进行研究.试验发现,纯柴油模式下,压缩冲程缸压随着喷油提前角的减小而增大,推迟喷油,后燃期延长,排气压力增大.甲醇替代率为30%时,随着喷油提前角的增大,峰值缸压和峰值放热率均增大.在柴油/甲醇双燃料燃烧模式下主喷射时刻对减少柴油机氮氧化合物(NO_x)排放具有较好的作用,同一替代率情况下NO_x排放随着主喷射时刻的推后而减少;主喷射时刻对碳烟(Soot)排放的影响则比较复杂,纯柴油模式下碳烟的排放随着主喷射时刻的提前逐步减少,而柴油甲醇二元燃料燃烧(DMDF)模式下碳烟的排放则随着主喷射时刻的提前呈现出先上升后下降的趋势;DMDF模式下主喷射时刻提前CO、HC排放均降低,且替代率越大下降趋势越明显.     

孔雀绿体系流动注射光度法测定水中正磷酸盐

建立了流动注射-孔雀绿-磷钼杂多酸分光光度法测定水中痕量正磷酸盐的方法.优化了试验条件,方法在0 mg/L～0.3 00mg/L线性良好,检出限为0.002 mg/L,准确度和精密度均符合要求,而且快速简便,适用于地表水、地下水、饮用水等清洁水体中正磷酸盐的测定.     

Experimental study on the simultaneous desulfurization and denitrification by duct injection

The highly active absorbent with oxidization based on fly ash, lime and additive was prepared.Experiments of simultaneous desulfurization and denitrification were carried out using fixture bed and duct injection.The influencial factors for the absorptive capacity of the absorbent were studied. The absorptive capacities of 120.7 mg for SO2 and 43.7 mg for NOx were achieved at a Ca/(S N) molar ratio 1.2, respectively, corresponding removal efficiencies of 87% and 76%, while spent absorbent appeared in the form of dry powder. The optimal temperature and humidity of flue gas treated with this process were shown to be approximately 50℃, and 5% respectively. The mechanism of removal for SO2 and NOx was investigated. In comparison with traditional dry FGD,this process appears to have lower cost, less complicated configuration and simpler disposal of used absorbent. The valuable references can be provided for industrial application by this process. The foreground of application will be vast in China and in the world.     

顺序进样流动注射光度法测定水中氨氮

将顺序进样与流动注射分光光度法相结合,研发了氨氮自动在线检测仪,用于测定水中氨氮质量浓度.实验结果表明:当进样量为0.39 mL、显色剂体积为0.33 mL、停留时间为5 min、载流液流量为2.0 mL/min时,氨氮质量浓度p与吸光度A在氨氮质量浓度为0～ 15.00 mg/L的范围内呈良好的线性关系,标准工作曲线方程为A=0.01929+ 0.2362,相关系数为0.9993(n=11);检出限为0.020 mg/L;相对标准偏差为0.50％～2.38％;实际水样的加标回收率为94.5％～106.0％.     

The ex vivo and in vivo biological performances of graphene oxide and the impact of surfactant on graphene oxide's biocompatibility

Graphene oxide(GO)displays promising properties for biomedical applications including drug delivery and cancer therapeutics.However,GO exposure also raises safety concerns such as potential side effects on health.Here,the biological effects of GO suspended in phosphate buffered saline(PBS)with or without 1% nonionic surfactant Tween 80 were investigated.Based on the ex vivo experiments,Tween 80 significantly affected the interaction between GO and peripheral blood from mice.GO suspension in PBS tended to provoke the aggregation of diluted blood cells,which could be prevented by the addition of Tween 80.After intravenous administration,GO suspension with or without 1% Tween 80 was quickly eliminated by the mononuclear phagocyte system.Nevertheless,GO suspension without Tween 80 showed greater accumulation in lungs than that containing 1% Tween 80.In contrast,less GO was found in livers for GO suspension compared to Tween 80 assisted GO suspension.Organs including hearts,livers,lungs,spleens,kidneys,brains,and testes did not reveal histological alterations.The indexes of peripheral blood showed no change upon GO exposure.Our results together demonstrated that Tween 80 could greatly alter GO’s biological performance and determine the pattern of its biodistribution in mice.