【摘 要】
：
A fast and simple method, which involves continuous-flow microextraction (CFME) followed by high-performance liquid chromatography (HPLC) and variable-wavel
【机 构】
：
Key Laboratory of Pesticide & Chemical Biology of Ministry of Education, College of Chemistry, Centr
【出 处】
：
DaLian Internationall Symposia and Exhibition on Chromatogra
论文部分内容阅读
A fast and simple method, which involves continuous-flow microextraction (CFME) followed by high-performance liquid chromatography (HPLC) and variable-wavelength detection (VWD), has been developed to facilitate the identification and quantification of three phthalate esters (dimethyl phthalate (DMP), diethyl phthalate (DEP), and di-n-butyl phthalate (DnBP)) in water samples.Experimental parameters affecting the extraction efficiency, such as extraction solvent, solvent drop size, flow rate of sample solution, extraction time and addition of salt were investigated.Under the optimal conditions, the method yields a linear calibration curve in the concentration range from 0.01 tol0 μtg mE-1 for the target analysis.The limits of detection (LOD) of DMP, DEP and DnBP were 2, 1 and 5 ng mL-1 respectively, and relative standard deviations (RSDs) at the 100 ng mL-1 level were 7.6%, 3.2% and 8.6% respectively (n=6).Lake water, tap water and bottled mineral water samples were successfully analyzed using the proposed method.
其他文献
We synthesized temperature-responsive stationary phases modified with PNIPAAm in which temperature-responsive polymer was bound on silica gel supports.PIPAA
HPLC was used to separate chiral compouds with chiral column.Another method was used in HPLC with chiral mobile phase additives to separate chiral compounds
In April 2002, detection of high concentrations of acrylamide in common heated starch-rich foodstuffs by the Swedish National Food Administration and resear
Monolithic HPLC columns (Chromolith-columns) possess about 20% higher porosity than particulate ones.As a result they can be operated at much higher flow ra
Amino acids play an important role in the metabolism of the human organism.Abnormal levels of amino acids suggest that certain metabolism pathway has been d
目的:研究普外科临床中急性阑尾炎手术的护理措施及效果.方法:选取医院普外科收治的200例急性阑尾炎患者并随机分为人数相同的两组(n=100),一组进行常规护理(对照组),另一组
重症肺炎不经过积极的治疗,会对导致循环系统、器官造成影响,损害肺功能,严重者甚至出现呼吸衰竭,危及生命.此外重症肺炎还会对肾脏造成一定影响,引起少尿无尿.若患者出现感
阴道炎是一种女性特有疾病,而导致女性患者外阴阴道出现瘙痒、灼痛、刺激或是阴道异常流液病症的炎症反应就是阴道炎疾病.据调查,目前临床上约有22%-50%的患者为细菌性阴道病
Microdialysis sampling was investigated as a liquid-phase microextraction in the analysis of pesticide residual in tea water before GC/MS and GC/ECD measure