High performance liquid chromatography (HPLC) is one of the most important analytical methods used in chiral separations.And the enantioseparation of β-agonists by HPLC with the chiral stationary phas
In analysis techniques,a simple and rapid sample pre-treatment method is critical.Usually,ultrasonic extraction,reflux extraction and immersion extraction were used as pre-treatment methods for the an
In this study,a novel injection method termed as fractional injection technique has been developed for HPLC total analysis of different polarity compounds.The fractional injection device including: mi
克林霉素-2-磷酸酯注射液是一种无菌的水溶液,在临床上主要用于上下呼吸道的感染,泌尿生殖器的感染,及一些软组织损伤等感染类疾病的治疗.克林霉素-2-磷酸酯是一种加热不稳定的抗生素类药物,它的水溶液在加热条件下的主要降解产物有林可霉素-2-磷酸酯、克林霉素以及很少量的克林霉素B 磷酸酯.在USP 标准中克林霉素-2-磷酸酯注射液主要的检测方法是用高效液相加上内标法.而对于克林霉素-2-磷酸酯注射液中
Gas purge microsyringe extraction (GP-MSE) is a novel and green microextraction technique,it is directly applied to gas chromatograph and mass spectrometer (GC/MS) analysis for determination of volati
有机锡化合物和蛋白的结合通常也是有机锡化合物与蛋白半胱氨酸和组氨酸的结合.实验证明,有机锡化合物不仅能与细胞膜上的蛋白反应,也可以与细胞内蛋白反应[1,2].这些反应是根据有机锡和氨基酸的配位反应进行的.有机锡化合物与生物分子的相互作用,是其毒性产生的主要原因.
橘,或称橘子,是芸香科柑桔属植物橘C.reticulata 的成熟果实,通过研究发现柑橘属植物中含有丰富的黄酮类化合物,其中橙皮苷是该植物中重要的活性成分,具有抗氧化、抗肿瘤、抗炎、扩张血管、降低血脂等多种功效.目前橙皮苷的检测主要针对枳实,陈皮等样品,并没有橘子果肉中含量测定的研究报道.本实验选取橘子的果肉为研究对象,通过对提取方法优化,采用HPLC 测定了橘子果肉中橙皮苷的含量,从而为橘子功效
Liposome is bilayered membrane structure composed of phospholipids which are amphiphilic molecules consisting of a polar part and a non-polar part [1].This important feature give liposome the ability
N’-nitrosonomicotine is harmful ingredient in tobacco,International Cancer Research Center(IARC) classified it as I human carcinogen.In this paper,the enrichment properties of N’-nitrosonomicotine and
应用QuEChERS 前处理方法结合气相色谱(配火焰光度检测器)建立了绿茶中9 种有机磷类农药残留的快速分析方法.5g 样品用10mL 乙酸乙酯-正己烷(V:V = 1:1)均质提取后,以石墨化碳与乙二胺基-N-丙基混合型固相分散净化,高速离心后过滤膜,用GC-FPD 进行检测.在0.02 ～ 0.10 mg/kg 的添加水平,9 种有机磷农药的平均回收率是62.29％ ~ 123.80％,相对标