聚苯硫醚副产物浆料的分离及氯化锂的回收研究

聚苯硫醚(PPS)的工业合成采用对二氯苯和硫化钠为原料,N-甲基-2-吡咯烷酮(NMP)为溶剂,氯化锂为助剂,经加压缩聚反应而成.该反应除了获得PPS外,还产生一部分副产物淤浆,有必要对其组成物进行分离回收和资源化利用.本文采用四氢呋喃(THF)为添加剂对这种副产物淤浆进行了分离研究,并对其中的锂盐进行了回收研究.结果表明,采用THF添加剂可以较为容易地将浆料分离为PPS低聚物、NMP以及无机盐,采用有机溶剂提取法可以回收氯化锂,LiCl的回收率可达40%.     

从含锗蒸馏渣中回收锗的工艺方法探讨

通过大量的生产试验，寻找一种利用经蒸馏提纯生产锗后的蒸馏渣回收生产锗的工艺方法。     

可变误差多面体法同时测定复方新诺明中二组分的含量

以可变误差多面体法处理多波长吸光光度数据同时测定了复方新诺明制剂模样和五个批号实际样品中磺胺甲恶唑（ＳＭＺ）,甲氧苯氨嘧啶（ＴＭＰ）的含量,１１份模拟样中ＳＭＺ、ＴＭＰ的回收率分别为９９．８％和１００．３％,复方新诺明片和注射液的测定结果与药典方法一致。     

多目标单纯形法在茜素红催化荧光测定痕量钒(V)中的应用

本文建立了茜素红催化荧光测定痕量钒(V)的新方法.在λ_(ex)/λ_(em)=381/445(nm),由多目标罚函数单纯形法获得最佳实验条件为:1%茜素红6mL,1mol/L盐酸2.1mL,饱和KIO_4,1.8mL,反应温度85℃,反应时间15.30min,钒的检测下限为7×10~(-10)g/mL,反应对试剂及金属离子均为一级反应.方法用于水样和铬钒钢中钒的测定,结果满意.     

流动注射梯度校正技术—对应溶液法测定配合物逐级稳定常数的研究

本实验利用流动注射梯度校正技术，结合微机可提供准确的时间延时和快速而数据采集和数据处理，并采用合适的流路系统，提出用配位体的一个高浓度标准溶液来制备“标准系列“，在非平衡条件下测定配合物逐级稳定系数的对应溶液法原理，通过对ＵＯ２＾２＋－ＳＣＮ＾－配合体系各级稳定系数的测定，说明该法具有简单，快速和准确度较高的优点。     

毛细管气相色谱切割反吹技术归一化法定量分析航空煤油中的芳烃

用气相毛细管色谱切割反吹技术 ,和在FFAP毛细管预柱上芳烃比高它 3个碳数的烷烃之后出峰的特点 ,通过阀切换把芳烃反吹入非极性OV 1分析柱中 ,按照沸点进行分离。从预柱上先流出的组分和从分析柱上后流出的组分先后通过微型三通进入同一个FID检测器 ,因此可用校正响应因子归一化法进行定量分析。从预柱出口到检测器之间的阻尼柱阻力 6倍于分析柱阻力 ,反吹后因载气流速提高 5 .4倍而有效地压缩了谱带 ,提高芳烃等目标组分的检出灵敏度 2倍。通过切割反吹操作能很好地完成航空煤油中从苯到C11芳烃的检测 ,阀切换的可允许时间窗口达± 18s,且分析结果的重现性误差RSD≤ 4 .0 %。     

分析化学计算中单纯形法一种新的收敛准则研究

本文根据误差理论提出了单纯形法收敛准则的一种改进,导出了收敛精度计算式,并用实验进行了验证。     

Simultaneous Optimization of Variables in Fia Systems by Means of the Simplex Method

Abstract

A response function (RF) in order to simultaneously optimize different variables by the SIMPLEX method in FIA systems, with the possibility of applying weights, is proposed. The optimization program developed to use this RF is assayed in the optimization of two different flow injection procedures. The obtained results are discussed.     

An Update on Molecularly Imprinted Polymer Design through a Computational Approach to Produce Molecular Recognition Material with Enhanced Analytical Performance

Molecularly imprinted polymer (MIP) computational design is expected to become a routine technique prior to synthesis to produce polymers with high affinity and selectivity towards target molecules. Furthermore, using these simulations reduces the cost of optimizing polymerization composition. There are several computational methods used in MIP fabrication and each requires a comprehensive study in order to select a process with results that are most similar to properties exhibited by polymers synthesized through laboratory experiments. Until now, no review has linked computational strategies with experimental results, which are needed to determine the method that is most appropriate for use in designing MIP with high molecular recognition. This review will present an update of the computational approaches started from 2016 until now on quantum mechanics, molecular mechanics and molecular dynamics that have been widely used. It will also discuss the linear correlation between computational results and the polymer performance tests through laboratory experiments to examine to what extent these methods can be relied upon to obtain polymers with high molecular recognition. Based on the literature search, density functional theory (DFT) with various hybrid functions and basis sets is most often used as a theoretical method to provide a shorter MIP manufacturing process as well as good analytical performance as recognition material.     

单纯形优化法研究V（V）－NH_2OH－PAR三元配合物组成比

本文研究运用改良单纯形基本原理建立了单纯形推移计算公式，结合分光光度法首次研究并报道了Ｖ（Ｖ）－ＮＨ_２ＯＨ－ＰＡＲ三元配合物的组成比，三种不同初始单纯形下，均获得组成比为２＋１＋２。该法简便、快速、准确度较高，且可克服传统的三元相图法需绘图等缺点。     

环炉分离—固体表面化学发光法测定微量样品中的银

本文提出了环炉分离-固体表面化学发光测定微量样品中银的方法。方法简便,快速,具有很好的选择性。测足的相对标准偏差为8.4％(5.0ngAg,n=11),校准曲线的线性范围是0.5～50ng Ag。此方法已用于合金样品中银的测定。     

Study on Conductivity Properties of PEDOT Prepared through a Modified LB Film Method

Adopting LB film method, an arachidic acid (AA)/PEDOT multilayer LB film was chosen, and polymerized EDOT monomers in hydrophilic group of LB to prepare arachidic acid (AA)/PEDOT multilayer LB film. UV‐Vis, FT‐IR and XPS analyses implied that EDOT was effectively polymerized in film, and thus PEDOT conducting polymer was produced. Analyses of XRR and SIMS indicated that film had a well‐arranged lamella structure, and further research showed that polymerization of EDOT in AA film destroyed the orderliness of the original LB film. This phenomenon could be related to the destructive effect of polymerization on layered structure. We used four‐point probe and semiconductor instrument to study the conductivity property of the film, and observed that the conductivity of AA/PEDOT film had sudden changes with the processing time of changes in effective conduction network. That was caused by "permeability" in conducting channel of multilayer film. The test results also indicated that the conductivity of AA/PEDOT film was obviously better than that of spin‐coating PEDOT/PSS film or that of ODA‐SA/PEDOT‐PSS film, which was due to the higher π structure of PEDOT structure and ordered film structure.