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Determination of Trace Amount of Polycyclic Aromatic Hydrocarbons in Urban Sewage by Solid-phase Extraction Coupled with High Performance Liquid Chromatograph 被引量:2
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作者 WANG Jing-fei1,KANG Quan-ying1,RONG Nan1,2,WU Yi-hong1,LI Hong-bo1 1.Hebei Provincial Academy of Environmental Science,Hebei Provincial Laboratory of Water Environmental Science,Shijiazhuang 050037,China 2.College of Chemistry and Environmental Science,Hebei University,Baoding 071002,China 《Meteorological and Environmental Research》 CAS 2011年第10期91-94,共4页
[Method] This study aimed to determine trace amount of polycyclic aromatic hydrocarbons(PAHs) in urban sewage by using solid-phase extraction(SPE) coupled with high performance liquid chromatograph(HPLC).[Method] From... [Method] This study aimed to determine trace amount of polycyclic aromatic hydrocarbons(PAHs) in urban sewage by using solid-phase extraction(SPE) coupled with high performance liquid chromatograph(HPLC).[Method] From the aspects of solid-phase extraction column,elution solvent,elution volume,elution speed and so forth,the test conditions of SPE-HPLC method were optimized,and trace amount of PAHs in urban sewage was determined.[Result] The optimized solid-phase extraction conditions were SUPELCLEAN LC-18 solid-phase extraction column,methylene dichloride as elution solvent,15 ml elution volume,2 ml/min elution speed,5 ml/min loading speed,1 000 ml water with 200 ml methanol loading volume.Under the optimized extraction conditions,the recovery was high,namely 76.3%-105.2%;relative standard deviation was 3.8%-6.0%,showing good precision;detection limit was low,only 0.000 8-0.048 0 μg/L.[Conclusion] This method is user-friendly,with high sensitivity and good precision,and suitable for continuous determination of a large volume of water samples. 展开更多
关键词 Solid-phase extraction(SPE) high performance liquid chromatograph(HPLC) Polycyclic aromatic hydrocarbons(PAHs) Urban sewage China
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High Performance Liquid Chromatographic Determination of Phenolic Acids in Fruits and Vegetables
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作者 LI PING, WANG Xu-QlNG, WANG HlJAI-ZHOU, AND WU YONG-NlNGInstitute of Nutrition and Food Hygiene, Chinese Academy of Preventive Medicine, 29 Nanwei Road, Beijing 100050, China 《Biomedical and Environmental Sciences》 SCIE CAS CSCD 1993年第4期389-398,共10页
A simple isocratic HPLC technique has been developed for the quantitative analysis of phenolic acids (PAs) in fruits and vegetables. Nine benzoic and cinnamic acid derivatives were separated in less than 30 min, and t... A simple isocratic HPLC technique has been developed for the quantitative analysis of phenolic acids (PAs) in fruits and vegetables. Nine benzoic and cinnamic acid derivatives were separated in less than 30 min, and the resolution was all more than 1.23. The ranges of linearity for PAs standards were 0.2-100 ng, even up to 600 ng (r = 0.983-1.000) and the detection limits were 0.02-0.24 mg/kg. Samples of fresh vegetables and fruits were extracted with 80% mcthanol and ethyl acetate, then purified with C18 Sep-Pak cartridge and determined by HPLC. This method was applied to the determination of PAs in 7 kinds of fruits and vegetables, i.e., apple, pear, Chinese cabbage, cauliflower, turnip, soybean sprout and white grape wine. The content of the 9 PAs varied widely in the 7 kinds ol'foods studied. The average concentrations ofchlorogenic acid in apple (100.2 mg/kg) and pear (30.8 mg/kg) were quite high, and sinapinic acid was remarkable (42.5 mg/kg) in Chinese cabbage, and protocatechuic acid had the highest concentration of all the PAs in white wine. 展开更多
关键词 high performance liquid chromatographic Determination of Phenolic Acids in Fruits and Vegetables
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Control System for Low Pressure Gradient Mixer in High Performance Liquid Chromatograph
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作者 赵瑛 王珺艳 +1 位作者 任秋实 柴新禹 《Journal of Shanghai Jiaotong university(Science)》 EI 2010年第1期54-57,共4页
A control system used in high performance liquid chromatograph(HPLC) was described.The control system adopting low pressure gradient elution was tested with different initial and end volume fractions,and four types of... A control system used in high performance liquid chromatograph(HPLC) was described.The control system adopting low pressure gradient elution was tested with different initial and end volume fractions,and four types of gradient elution curves.The experimental results verified the theoretical analyses of the applied method.This self-designed control system can achieve approving accuracy,repeatability and low cost,which has a bright outlook for domestic applications. 展开更多
关键词 low pressure GRADIENT high performance liquid chromatograph (HPLC) MIXER
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Analysis of Sucrose Esters with Long Acyl Chain by Coupling of HPLC-ELSD with ESI-MS System 被引量:5
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作者 朱金丽 汤艳峰 +1 位作者 李建华 张淑芬 《Chinese Journal of Chemical Engineering》 SCIE EI CAS CSCD 2009年第6期1032-1037,共6页
The analysis of sucrose esters with long acyl chain by improved high performance liquid chromatographic method with evaporative light scattering detection (HPLC-ELSD) and electrospray ionization mass spectrum (ESI... The analysis of sucrose esters with long acyl chain by improved high performance liquid chromatographic method with evaporative light scattering detection (HPLC-ELSD) and electrospray ionization mass spectrum (ESI-MS) is investigated. The improved HPLC-ELSD method for the separation and quantitation of commercial and synthesized sucrose esters is described. Samples are analyzed by means of a reversed-phase (RP) HPLC using a Hypersil C8 column (250 mm× 4.6 mm, 5 μm particle size) with methanol-tetrahydrofuran (vo)ume ratio of 90 : 10) and water under gradientcondition as the mobile phase, in which the flow rate is 1.0 ml·min^-1 and the column temperature is set at 40℃. This procedure provides a complete separation and determination ot monoester, diester, triester and higher esters with different acyl chain lengths in each fraction by a single run, in combination with the ESI-MS technology. With this method, it is possible to determine the approximate compositions of monoto polyesters in one analysis and quantitate pure positional isomers precisely using an external standard method. It is found that the method of ESI-MS coupling with HPLC system for the analysis of sucrose esters is straight forward, rapid and inexpensive, and can be readily applied in synthesis, purification and structure studies. 展开更多
关键词 sucrose esters long acyl chain ANALYSIS high performance liquid chromatographic method with evaporative light scattering detection electrospray ionization mass spectrum
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