橡胶聚合物的鉴定裂解气相色谱法

基于橡胶标准试验方法,本文系统介绍了裂解气相色谱法(PGC)原理及其在橡胶工业分析中的应用,包括胶型定性,并用胶比例定量分析,橡塑并用及纤维骨架材料的定性,并列举了大量实测结果.另外,还利用PGC技术研发开展了橡胶配合剂方面的测试工作.     

裂解气相色谱法鉴定五种根管厌氧菌

本文采用裂解气相色谱法对根管厌氧菌进行裂解分离,根据色谱指纹图鉴定不同的厌氧菌。     

气相色谱法对烷基磷酸酯裂解产物的研究

本探讨了烷基磷酸酯的裂解方法，并对所裂解的卤烷进行了气相色谱分析，从而可快速、准确地鉴定烷基磷酸酯的烷链组成。     

利用裂解气相色谱分析丙烯酸树脂的组成

采用裂解气相色谱仪迅速获得了溶剂型丙烯酸树脂中溶剂和合成树脂的组成。对于溶剂系统,柱箱从45℃开始,保温5 min,以5℃/min的速率升到200℃,保温5 min,裂解温度和裂解时间分别为200℃和10 s;对于固体树脂,柱箱从40℃开始,保温5 min,以7℃/min的速率升到250℃,保温5 min,裂解温度和裂解时间分别为550℃和30 s。对于含量较高的组分,其相对标准偏差<0.5%。树脂组成的分析结果与验证结果符合良好。该方法简便易行,对于丙烯酸树脂及其涂料生产企业开发新产品和了解市场信息,具有重要的参考价值。     

激光裂解色谱法鉴定聚合物

1 前言 本文用CO_2激光裂解器和SC—1001型气相色谱仪组成一套裂解色谱装置,主要对聚乙烯、聚氯乙烯、聚丙烯这三种聚合物进行了裂解色谱试验,得到了各自的裂解色谱图,借以鉴定聚乙烯类、聚氯乙烯类、聚丙烯类的聚合物。2 实验部分     

白血病患者骨髓裂解气相色谱分析

<正> 白血病(Leukemia)是一种恶性程度极高的血液系统疾病,目前国内外对此病的诊断仍是以患者临床表现、血象、骨髓象及实验室检查为依据,尚缺乏一种快速、简便、准确、客观和自动化程度高的诊断方法。本文用裂解气相色谱(Pyrolysis Gas Chromatography,缩写PGC)对9名正常人及9名临床确诊的白血病患者的骨髓进行了分析,显示出了PGC在白血病诊断方面的一定价值。     

CO_2激光裂解气相色谱测定混纺纤维中各组分

作者选用JL-01型CO_2激光裂解器和SP-2305 E型气相色谱仪,组成一套裂解色谱装置,针对本地区几家生产厂的混纺织物纤维中各组分进行含量分析。分析结果与现场实际配料基本一致,与国标化学测试方法相比,具有简便、快速的特点。     

气相色谱测定乙烯裂解气组成的方法研究

介绍了一种快速测定乙烯裂解产物气体组分含量的方法.采用多维气相色谱方法,4阀7柱的配置,3通道并行,3检测器检测,通过阀切换及柱反吹技术,实现所有组分的快速分离检测.结果表明,该方法具有速度快、效率高、易操作、结果准的优点.     

Polymer-polymer interaction parameter determined by inverse gas chromatography

Inverse gas chromatography was employed to determine the apparent polymer-polymer interaction parameter χ′_23,app for the following blends using them as binary stationary phases: poly(vinyl acetate)-poly(n-butyl methacrylate) at 100 and 120°C, poly(vinyl acetate)-atactic poly(vinyl isobutyl ether) at 70°C, and poly(n-butyl methacrylate)-atactic poly(vinyl isobutyl ether) at 70°C. The interaction parameter χ′_23,app depended significantly on the chemical nature of the solvent (probe) used and the composition of the stationary phase. The lowest values of χ′_23,app were obtained when aromatic and chlorinated-alkane probes were eluted on stationary phases having weight fractional compositions of the component polymers in the range 0.4–0.6. The results predict a better compatibility for poly(n-butyl methacrylate)-atactic poly(vinyl isobutyl ether) than for the other blends.     

脂肪醇聚氧乙烯醚气相色谱定性定量分析

采用毛细管气相色谱法分离测定脂肪醇聚氧乙烯醚混合物,对色谱条件进行了考察和优化,确定了最佳色谱条件:程序升温200℃(2 min),10℃/min,340℃(∞);气化室温度350℃;离子化室温度350℃;载气N2,流速30 mL/min;柱前压10 Psi(约69 kPa);氢气流速20 mL/min;空气流速300...     

ABS生产废水中有机污染物分析——气相色谱法

建立了液液萃取预处理,采用气相色谱法对ABS生产废水中甲苯、乙烯基环己烯等6种有机污染物进行了定性分析。最佳萃取剂为二氯甲烷,最佳萃取条件为先在碱性条件下萃取3次,然后在酸性条件下萃取3次。结果表明,废水中各组分的检出限均在0.200mg/L以下,相对标准偏差均小于2%,组分的回收率在80.5%~93.5%的范围内。     

Multiple cracking of rigid platinum film covering polymer substrate

Multiple cracking of a thin platinum film deposited on polyethylene terephtalate, isoprene rubber, and natural rubber substrates under tensile deformation was studied by light and scanning electron microscopy. The cover fractures on several fragments elongated in the direction perpendicular to the loading direction. The width of the fractured platinum fragments depends on the thickness of the deposited layer and applied tensile stress. A semiempirical equation describing the average width of the cover fragments was obtained. Appearance of a wavy pattern on an originally smooth surface of composites with rubberlike polymer substrate was observed. The mechanism of the appearance of the surface wave is a mechanical buckling instability of the cover under compressive force. © 1999 John Wiley & Sons, Inc. J Appl Polym Sci 72: 1267–1275, 1999     

指纹特征-毛细管气相色谱法定性检测大米中矿物油

针对皂化法鉴定矿物油的不足,利用毛细管气相色谱仪,结合矿物油组成特点建立了大米中矿物油气相色谱指纹定性检测方法,通过比较大米提取物的色谱峰组成来对大米是否掺加矿物油进行定性,方法定性可靠直观,应用到大米的检测中效果良好。     

Dispersion states of porous inorganic materials in polymer blends observed by inverse gas chromatography

Inverse gas chromatography (i.g.c.) of columns prepared with a polymer blend of poly(ethylene oxide) (PEO) and polystyrene (PS) in the presence of pulverized porous inorganic materials has been studied. Information on the inorganics-polymer interaction was obtained from the change in the Z-shaped curve observed in the retention diagram. Inorganic materials except active carbon selectively incorporated PEO into their pores. The incorporation ability increased with increasing surface area of inorganic material. Molecular sieve 5A was scarcely able to incorporate PEO into its pores in spite of its large surface area, and this was ascribed to its small pore diameter. Active carbon selectively incorporated PS into its pores. Irreversible adsorption of a solute on active carbon was a dominant process in i.g.c. measurement for the column prepared with polymer and active carbon.     

反气相色谱法测定苯-丙-硅共聚物的溶解性能

本文应用反气相色谱法测定了苯乙烯-丙烯酸丁酯-乙烯基三乙氧基硅氧烷共聚物与探针分子的表观热力学相互作用参数X12,并以此研究了聚合物与小分子有机化合物的溶解性能。实验中测定了探针分子在聚合物固定相中的保留时间,计算出比保留体积Vg°及X12。根据聚合物与探针分子相溶性判定原则:当X12(0.5时,该探针分子为聚合物的良溶剂,X12越小,溶剂的溶解能力越强;当X12(0.5时,该探针分子则为聚合物的不良溶剂;当X12=0.5时,则该探针分子为聚合物的理想溶剂。预估了聚合物与小分子有机化合探针分子的溶解性能,为该聚合物作为固相微萃取吸附剂的应用性能研究提供了重要的依据。     

催化裂化吸附转化加工焦化蜡油工艺

分析了焦化蜡油（CGO）与直馏蜡油（VGO）的性质,焦化蜡油与直馏蜡油性质相差较大,主要表现在焦化蜡油残炭、碱氮化合物、胶质、沥青质及金属含量较直馏蜡油高,催化裂化（FCC）直接掺炼焦化蜡油,会造成转化率降低,产物分布恶化,运转周期缩短。通过常规催化裂化加工焦化蜡油工艺与FCC通过吸附转化工艺加工焦化蜡油比较,得出催化裂化吸附转化加工焦化蜡油工艺可以明显改善产物分布,提高转化率,降低碱氮化合物对催化剂的毒害作用,提高装置的整体经济效益。     

仲丁灵的气相色谱法测定

叙述了采用气相色谱法即用5％OV．101／Chromosorb W AW DMCS（154．180μm）的玻璃填充柱,以邻苯二甲酸二丁酯为内标物,在进样口温度240℃、检测器温度220℃、柱温200℃和载气（氮气）流速30mL／min的色谱条件下进行分离,用氢火焰离子化检测器对仲丁灵进行定量分析。该分析方法的标准偏差为O．3137,变异系数为0．3468％,平均回收率为99．67％,线性相关系数为0．9997。