离子交换法纯化重组类人胶原蛋白Ⅱ的研究

用阳离子交换树脂CM-52分离纯化类人胶原蛋白Ⅱ（Human Collagen-like Bioprotein Ⅱ，HCBⅡ）。通过实验，分别确定了静态吸附和柱层析吸附的操作条件，即静态吸附：在pH4．0、NaCl0．15mol／L、进料浓度7g／L，处理量17．26ml／g树脂的条件下进行吸附，吸附时间为60min；柱层析：在pH4．0、NaCl0．15mol／L、进料浓度5g／L、流速5ml／min的条件下进行吸附。然后上柱，在pH4．0、NaCl0．30mol／L下进行脱附。实验表明，采用静态吸附的方式吸附HCBⅡ，然后上柱洗脱，HCBⅡ的吸附量可达到48、6mg／g树脂，回收率83．8％，操作时间短，分辨率高，最终纯化的HCBⅡ达电泳纯，分子量为97kD。     

D315树脂吸附脱除SO_4~(2-)研究

本文研究了用D315树脂吸附脱除蚕蛹复合氨基酸水解液中SO42-的方法。试验结果表明：D315树脂对SO42-的静态交换容量为110mg／ml树脂，吸附平衡时间40分钟，pH4．50。被吸附的SO42-可用6．5BV，1mol／l的氨水以1．5BV／hr的流速完全洗脱。该树脂选择性好，复合氨基酸损失率极低。     

几种树脂对西红花糖苷的吸附性能的研究

本文系统研究了硅胶和几种国产吸附树脂对西红花提取物溶液的吸附与洗脱性能，包括树脂的筛选，洗脱剂的选择，并研究了pH，温度和西红花提取物的浓度对西红花提取在SZ－1吸附树脂上的吸附影响，结果表明，SZ－1吸附树脂对西红花提取物的吸附能力较强，洗脱能力为最好，其吸附性能和洗脱性能均优于常用色谱固定相硅胶，SZ－1吸附树脂的静态吸附容量为1．04g/g，动态吸附容量为0．5－0．6g/g，洗脱率可达98％以上，且吸附速度快，易于洗脱和再生。     

PP(聚丙烯)-二苯氨基脲树脂分离富集原子吸收法测定地质样品中的银

研究了PP(聚丙烯)-二苯氨基脲树脂的合成及其分离富集样品中银的条件。于1mol／L的HCl介质中,银定量吸附在PP(聚丙烯)-二笨氨基脲树脂上,用0．5mol／L硫脲溶液洗脱,火焰原子吸收光谱法测定。回收率在96.4％～103．2％之间。可用于实际地质样品中贵金属的分离富集与测定。     

固载硫杂杯芳烃树脂分离富集-火焰原子吸收法测定痕置银

报道了色谱301固载硫杂杯芳烃树脂分离预富集-火焰原子吸收光谱法测定痕量银的新方法。探讨了固载硫杂杯芳烃树脂对银的吸附原理与最佳条件。将含Ag^＋试液在pH=10、温度为23±2℃的条件下恒温震荡10min，静置10min，Ag^＋可被树脂定量富集被吸附的Ag^＋可用5mL酸性硫脲（0．15mol／L HCl＋0．15mol／L硫脲）完全洗脱，洗脱液中的银用火焰原子吸收光谱法测定。该法对银的检出限为0．17μg／L（3σ，n=11）；线性范围为0．006—3mg／L。对0．18mg／L的Ag^＋标液进行7次测定，RSD=1．53％。回收率在99．9％-105．0％之间。用于“二次资源”锌矿渣和环境水样中痕量银的测定，结果满意。     

用离子交换法从发酵液中提取1,6-二磷酸果糖

在发酵生产１,６－二磷酸果糖的提取工艺中,对提取总率影响较大的离子交换工艺进行了研究,结果表明,用南开大学化工厂生产的ＮＫ－Ｄ３０１Ｃ１型树脂对已预处理的ＰＨ为２的发酵液中１,６－二磷酸果糖进行动态交换吸附,当上柱流速控制在２５ｍｌ／ｍｉｎ条件下,其交换量为０．７０６ｍｍｏｌ／ｍｌ,用０．０１ｍｏｌ／Ｌ ＮａＣｌ－０．０１５ｍｏｌ／Ｌ ＨＣｌ和０．４ｍｏｌ／ＬＮａＣｌ－０．１５ｍｏｌ／Ｌ ＨＣｌ分步洗脱,流速控制在２５ｍｌ／ｍｌ时,其洗涤效果最好,离子交换工序收率大于９０％。     

铜印迹螯合树脂对金属离子的吸附特性

研究了铜印迹螯合树脂与非印迹螯合树脂对金属离子的吸附性能，结果表明：铜印迹树脂对Cu^2 、Ni^2 、Zn^2 的吸附量比非印迹树脂有显著增大,两者对Cu^2 的吸附速率均较快，其表观吸附速率分别为0．044s^-1和0．040s^-1；印迹树脂对Cu^2 的吸附可用Langmuir或Freundlish等温式来描述；其动态吸附曲线与离子的起始浓度相关；用0．5mol／L HCl即可快速洗脱吸附的Cu^2 ，树脂具有较强的再生能力，可以重复使用。     

酚醛型吸附树脂对茶碱的吸附性能研究

研究了酚醛型吸附树脂对茶碱的静态和动态吸附。结果表明3种树脂对茶碱的吸附量均达117－204mg/g，明显优于DuoliteS-761;酚醛型吸附树脂等温吸附茶碱的平衡吸附数据符合Langmuir方程，相关系数在0．99以上，因此，酚醛型吸附树脂吸附茶碱属单分子层吸附；用1mol/LHCl和W甲醇为80％复合溶液作为吸附树脂的洗脱剂，效果很好。     

板蓝根药渣对低浓度含铅废水的吸附特性研究

研究了板蓝根药渣对配制的低浓度含铅废水的吸附特性．结果表明，板蓝根药渣能快速、大量地吸附铅．Langmuir型吸附模型能较好地描述板蓝根药渣对铅的吸附实验数据，吸附模型为ce/q=1．9209 0．007319ce，其线性回归系数高达0．9998；溶液pH和温度是影响吸附的重要因素，pH6．0-7．0、25℃左右是吸附的适宜条件．对板蓝根药渣用0.1mol／L-0．2mol／L的NaOH溶液进行预处理，能有效提高板蓝根药渣吸附铅的能力。0．05mol/L的HNO3能有效地洗脱板蓝根药渣上吸附的铅．     

酚醛型吸附树脂对水体系中吡啶和N,N-二甲基苯胺的吸附性能研究

研究了酚醛型吸附树脂在水体系中对吡啶和N，N-二甲基苯胺的静态和动态吸附行为．结果表明，在水中树脂对吡啶和N，N-二甲基苯胺的吸附主要以疏水吸附机理进行；吸附吡啶和N．N-二甲基苯胺的初始阶段，即达到38．3～48．9％平衡吸附时，吸附速率数据和半经验速率方程很吻合：酚醛型吸附树脂等温吸附吡啶和N，N-二甲基苯胺的平衡吸附数据符合Langmuir方程，相关系数在0．99以上，酚醛型吸附树脂吸附吡啶和N，N-二甲基苯胺属单分子层吸附：用80％的乙醇溶液作洗脱剂来洗脱吸附吡啶已达饱和的JDW-2树脂，效果是很理想的．在3．6个床体积内洗脱率达91．52％，4．8个床体积内洗脱率达到94．85％。表明酚醛型吸附树脂具有优良的洗脱性能．     

离子交换树脂的选择及柠檬酸溶液循环使用研究

用离子交换树脂法吸附柠檬酸溶液中的金属离子,苯乙烯系阳离子交换树脂的吸附性能较好,它对镍、铝离子的吸附容量均较大,且吸附前后柠檬酸溶液的浓度变化较小.静态条件下树脂对镍的吸附容量为16.83mg Ni/g干树脂,对铝为21.36mg Al/g干树脂;动态条件下树脂对镍的吸附容量为6.78mg Ni/g干树脂,对铝为31.8mgAl/g干树脂,吸附液流速为1m/h～3m/h.吸附后的柠檬酸溶液可循环使用.当用1mol/L硫酸解吸时,树脂对镍铝的解吸率可达90%以上.当硫酸中Ni2 为1.70mmol/L,Al3 为7.40mmol/L时,树脂的解吸率仍可达80%以上.     

批量离子交换层析和凝胶过滤层析在类人胶原蛋白I纯化中的应用

研究了利用批量离子交换层析与凝胶过滤层析相结合的方法纯化类人胶原蛋白I的最佳条件。分别考察了不同离子交换树脂、缓冲溶液pH、离子强度、进料蛋白浓度对批量离子交换的影响,以及不同凝胶过滤介质对凝胶过滤层析的影响。结果表明,采用阴离子交换树脂DEAE52吸附杂蛋白,缓冲液pH为7.0,NaCl浓度为0.2mol/L,进料蛋白浓度为40mg/mL,并采用凝胶过滤介质SephadexG-100进一步纯化后,类人胶原蛋白I的纯度可达到98.2%,总纯化倍数为3.1,总回收率为80.6%。SDS-PAGE分子量分析和N末端氨基酸序列分析均表明纯化后的类人胶原蛋白I与基因设计一致。     

离子交换分离钨钼及微波诱导树脂再生的研究

本文研究了不同型号的树脂和硫化条件对离子交换分离钨钼的影响。探讨了用D201树脂交换除钼及其树脂再生的机理。实验结果表明：碱性钨酸铵（AT）溶液经硫化转型后,可用阴离子交换柱除去其微量钼;该除钼树脂经微波场辐照诱导-减性食盐水协同再生处理,可基本恢复其除相交换容量。     

Separation and preconcentration of trace manganese from various samples with Amberlyst 36 column and determination by flame atomic absorption spectrometry

This work assesses the potential of a new adsorptive material, Amberlyst 36, for the separation and preconcentration of trace manganese(II) from various media. It is based on the sorption of manganese(II) ions onto a column filled with Amberlyst 36 cation exchange resin, followed by the elution with 5 mL of 3 mol/L nitric acid and determination by flame atomic absorption spectrometry (FAAS) without interference of the matrix. Different factors including pH of sample solution, sample volume, amount of resin, flow rate of sample solution, volume and concentration of eluent, and matrix effects for preconcentration were investigated. Good relative standard deviation (3%) and high recovery (>95%) at 100 μg/L and high enrichment factor (200) and low analytical detection limit (0.245 μg/L) were obtained. The adsorption equilibrium was described well by the Langmuir isotherm model with maximum adsorption capacity of 88 mg/g of manganese on the resin. The method was applied for the manganese determination by FAAS in tap water, commercial natural drinking water, commercial treated drinking water and commercial tea bag sample. The accuracy of the method is confirmed by analyzing the certified reference material (tea leaves GBW 07605). The results demonstrated good agreement with the certified values.     

阴离子树脂分离富集光度法测定尾矿中微量钼

研究了717型阴离子交换树脂柱分离-富集钼的条件,建立了分光光度法测定尾矿中微量钼的方法。在pH 7.5的条件下,钼以MoO42-形式被树脂定量吸附后,采用体积比1:1的2 mol/L HNO3和0.5 mol/L NH4NO3混合溶液洗脱,消除了绝大部分共存离子的干扰。结果表明,采用硫氰酸盐光度法,体系的最大吸收波长为460 nm,线性范围为0～120.0μg/L,检出限为1.3μg/L。对实际样品测定结果与ICP-AES法相符,6次测定值的RSD=3.3%,加标回收率在96.2%～105.7%之间。     

717型阴离子交换树脂吸附水溶性芳香族有机污染物研究

研究了717型阴离子交换树脂对苯酚、苯甲酸和十二烷基苯磺酸钠(SDBS)等水溶性芳香族污染物吸附过程的基本化学问题.研究结果表明:717型树脂对苯酚、苯甲酸和SDBS的吸附过程均符合Lagergren二级吸附动力学方程,吸附速率均随着温度的升高而加快,吸附表观活化能Ea分别为13.2kJ/mol、59.5kJ/mol和48.1kJ/mol,吸附过程△H0和△S0均为正值,△G0均为负值,吸附能够自发进行;吸附等温模型符合Langmuir等温式;318K时,717型树脂在pH=9.1对SDBS的饱和吸附容量为360mg/g;在pH=10.2,对苯酚和苯甲酸的饱和吸附容量分别为194mg/g和286mg/g.用浓度均为0.5mol/L,体积比为5∶1的NaCl-NaOH混合溶液可快速洗脱树脂上吸附的污染物,洗脱率达98％以上.该树脂对水溶性芳香族污染物吸附容量大,易于再生和循环利用,可用于环境水体中水溶性芳香族有机污染物的吸附治理.     

Detection of adulterations in processed coffee with cereals and coffee husks using capillary zone electrophoresis

The proposed method for the identification of adulteration was based on the controlled acid hydrolysis of xylan and starch present in some vegetable adulterants, followed by the analysis of the resulting xylose and glucose, which are the monosaccharides that compose, respectively, the two polysaccharides. The acid hydrolysis with HCl increases the ionic strength of the sample, which impairs the electrophoretic separation. Thus, a neutralization step based on anion exchange resin was necessary. The best separations were obtained in NaOH 80 mmol/L, CTAB 0.5 mmol/L, and methanol 30% v/v. Because of the high value of pH, monosaccharides are separated as anionic species in such running electrolyte. The LOQ for both monosaccharides was 0.2 g for 100 g of dry matter, which conforms to the tolerable limits.     

STUDY ON DETERMINATION OF TRACE Cu（Ⅱ） BY DDCT CHELATING RESIN PRECONCENTRATION AND THIN LAYER RESIN PHASE SPECTROPHOTOMETRY

A new method for determination of Cu(Ⅱ) by DDCT chelating resin preconcentration and thin layer resin phase spectrophotometry was developed. The method has a high sensitivity (ε435 =3.6×105 L/mol· cm), which is 33 times higher than that of liquid phase spectrophotometry. It has a good selectivity (most coexisting ions could not influence determination) and an ideal precision [30μg Cu(Ⅱ), n=6, RSD= 1.67%]. The content of Cu(Ⅱ) in water, high purity rare earth and its oxide was determined. The detection limit of Cu(Ⅱ) is 5.3μg/L, and the linear range is 0～7.2 μg/ml. The result is satisfactory.     

双硫腙螯合形成树脂分离富集地质样品中的微量金,铂,钯及其测定

研究了双硫腙螯合形成树脂的合成及其分离富集地质样中Ａｕ，Ｐｔ，Ｐｄ的条件。于ｐＨ１．５的ＨＣｌ介质中，Ａｕ，Ｐｔ，Ｐｄ定量吸附于Ｈ２ＤＺ形成树脂上与大量贱金属分离。用０．６ｍｏｌ／Ｌ的硫脲－０．１ｍｏｌ／ＬＨＣｌ洗脱贵金属，回收率均在９４％－１０６％之间。铁也部分上柱，用磺基水杨酸与酒石酸１：１联合掩蔽除去。     

Synthesis of phosphorus-modified poly(styrene-co-divinylbenzene) chelating resin and its adsorption properties of uranium(VI)

A new phosphorus-modified poly(styrene-co-divinylbenzene) chelating resin (PS–N–P) was synthesized by P,P-dichlorophenylphosphine oxide modified commercially available ammoniated polystyrene beads, and characterized by Fourier transform infrared spectroscopy and elemental analysis. The adsorption properties of PS–N–P toward U(VI) from aqueous solution were evaluated using batch adsorption method. The effects of the contact time, temperature, pH and initial uranium concentration on uranium(VI) uptake were investigated. The results show that the maximum adsorption capacity (97.60 mg/g) and the maximum adsorption rate (99.72 %) were observed at the pH 5.0 and 318 K with initial U(VI) concentration 100 mg/L and adsorbent dose 1 g/L. Adsorption equilibrium was achieved in approximately 4 h. Adsorption kinetics studied by pseudo second-order model stated that the adsorption was the rate-limiting step (chemisorption). U(VI) adsorption was found to barely decrease with the increase in ionic strength. Equilibrium data were best modeled by the Langmuir isotherm. The thermodynamic parameters such as ?G ₀, ?H ₀ and ?S ₀ were derived to predict the nature of adsorption. Adsorbed U(VI) ions on PS–N–P resin were desorbed effectively (about 99.39 %) by 5 % NaOH–10 % NaCl. The synthesized resin was suitable for repeated use.