柱前衍生荧光检测反相高效液相色谱法测定氨基酸

首次分离并测定了中药锁阳药用有效成份氨基酸,为其补益作用及免疫功能提供了科学依据,并建立了该药用植物的FMOC—氨基酸色谱测定方法。     

双氯灭痛滴眼液的含量测定及其稳定性研究

用紫外光谱法测定双氯灭痛的含量和ＨＰＬＣ法研究其稳定性．在０００２ｍｏｌ／Ｌ氢氧化钠溶液中双氯灭痛于２７６±１ｎｍ波长处有最大吸收，其吸光度与浓度在５～３０μｇ／ｍｌ范围内呈良好线性关系．回收率实验的相对标准偏差为０５％．ＨＰＬＣ法采用ＮｕｃｌｅｏｓｉｌＣ１８柱，以甲醇—水（５０∶５０）为流动相．实验结果表明滴眼液在强光照射和高温下贮存不稳定，经稳定性加速实验求出室温有效期为４７年     

马钱子碱的高效液相色谱测定

报道了使用反相ＨＰＬＣ法用Ｃ１８柱在２５４ｍｍ测定马钱子碱的新方法。实验结果表明，这种方法操作方便，测定结果准确可靠。     

A Fingerprinting Method Based on Module Extraction Used to Protect Intellectual Property

Intellectual Property （IP） reuse methodology has been widely used in Integrate Circuit （IC） design. Meanwhile, the corresponding security problems caused by illegal IP distribution have aroused lots of attentions. Unlike using IP watermark to identify IP＇s ownership, IP fingerprinting can be used to trace illegal distributor. In this paper, IP buyer＇s fingerprint is mapped into different derived instances of extracted modules, and then is embedded into IP to identify distributor in case of illegal distribution. Comparing with other fingerprinting method, the proposed method has some good characteristics such as low design effort, small storage demand, high security and few physical overheads.     

反相高效液相色谱法测定饮料中的糖精钠

首先将饮料样品中的糖精钠酸化为糖精,再用乙醚提取,然后通过反相高效液相色谱法测定糖精的含量。该法的线性范围为0.5～5.0μg,其最小检出量为10~(-7)g数量级,加标回收率则为93～100％。     

穿山龙中薯蓣皂甙元的测定与宁夏药物资源的开发

首次用高效液相色谱法分析测定了穿山龙中的薯蓣皂甙元，建立了该中药中薯蓣皂甙元分离，测定的色谱方法，利用本文考察了宁夏野生穿山龙，为宁夏药物资源的开发提供了科学依据。     

Fingerprint representation methods based on B-Spline functions

The global characteristics of a fingerprint image such as the ridge shape and ridge topology are often ignored in most automatic fingerprint verification system.In this paper,a new representative method based on B-Spline curve is proposed to address this problem.The resultant B-Spline curves can represent the global characteristics completely and the curves are analyzable and precise.An algorithm is also proposed to extract the curves from the fingerprint image.In addition to preserve the most information of the fingerprint image,the knot-points number of the B-Spline curve is reduced to minimum in this algorithm. At the same time,the influence of the fingerprint image noise is discussed.In the end,an example is given to demonstrate the effectiveness of the representation method.     

食品及饲料中三聚氰胺残留量液相色谱检测方法的研究

建立了食品及饲料中三聚氰胺残留检测的反相高效液相色谱方法。样品经乙腈水或甲醇水提取,离心分离,过0.2m滤膜,然后采用RP-HPLC-UV法测定,外标法定量。对色谱分离条件进行了优化,三聚氰胺在0.05g/mL～10.0g/mL范围内线性良好,相关系数为0.99994。在4.0mg/kg～80.0mg/kg浓度范围内,平均加标回收率在90.5%～102.7%之间,相对标准偏差为2.96%～3.62%,方法的最低检出限为5mg/kg。该方法简便、快速,满足食品及饲料中三聚氰胺残留量的检验工作需要。     

Principle, traits and functions of electrochemical fingerprint of Chinese traditional medicine

In regard to such challenging analysis problems as scientific identification and quality evaluation of Chinese traditional medicine, the electrochemical fingerprint technique of Chinese traditional medi- cine has been researched. The principle, traits, functions, etc., of the electrochemical fingerprint have detailedly been analyzed and discussed by the B-Z oscillatory system using malonic acid as main dissipation substance, characterized by the fact that different influences of different Chinese traditional medicines on the mechanism of the oscillatory reaction cause different changes of the shape of the potential-time curve of the oscillatory system under the conditions of constant tem- perature and pressure. An economical, simple and convenient, easy pushing and effective scientific method for distinguishing and evaluating multifarious Chinese traditional medicines has success- fully been put forward.     

荧光试剂衍生化液相色谱分析生物检材中的氟乙酸钠

建立了使用新的荧光衍生试剂9-氯甲基蒽(CA)衍生化生物检材中的氟乙酸钠,并通过薄层色谱和荧光检测的高效液相色谱(HPLC)分析的方法。合成得到氟乙酸钠的荧光衍生物——氟乙酸-9-亚甲基蒽酯(MA-MFA),纯度达到98%以上,通过红外光谱、核磁共振、元素分析和质谱对其进行结构表征。薄层色谱中展开剂为石油醚/乙酸乙酯(体积比为95∶5),检测限为5×10-8g(TLC)。高效液相色谱用AgilentHypersilODS反相色谱柱,以乙腈/水(体积比为85∶15)为流动相,荧光检测波长λex为256 nm,λem为412 nm。方法在2.5×10-9~125×10-9mol/mL浓度范围内呈良好的线性关系,线性相关系数为0.9988,生物样品空白添加实验的回收率为83%~90%,最低检测限为2×10-10g(S/N=3),日内、日间RSD均小于4%。该方法用于中毒死亡者的血液样品及其他检材的测定,效果良好。