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NTP (Non-thermal Plasma) is one of a promising applications for decontamination of particulate matter, but the research on the chemical components of particulate matter treated by plasma is poor. Particulate matter collected by plasma reactor and filters with NTP action and without NTP action was measured by TGA (Thermogravimetric Analysis). The chemical reactions between radical and particulate matter...
Pretreatment and determination for mercury species based on coupled chromatography techniques especially the combination of liquid chromatography with atomic fluorescence spectrometry were reviewed in this paper with 17 references, and the new trends for trace and ultra-trace of mercury species analysis in the future was also carried out.
The spherical beads were first systhesized by cellulose 4-methylbenzoate with partial hydroxyl groups, which was then crosslinked in the beads with 4, 4'-diphenylmethane dissocyanate. The obtained crosslinked beads were packed into an HPLC column and used as chiral stationary phase (CSP) for chiral separation of some racemates by high performance liquid chromatography (HPLC) using mobile phases contained...
In order to study the relationship between microbial diversity and organophosphate pesticide residues in planting base soils, six soil samples including three sandy soils and three cohesive soils were selected, from vegetable and crop base of Shenyang. Based on determining the level of pH, N, P, the organic matter and moisture contented in those soil samples, the physical and chemical properties of...
In order to find out the distribution of ploycyclic aromatic hydrocarbons of aerosol (PM10, PM2.5) and standardize the system of beneficiation reagent and provide basis for monitoring air, five sampling areas were set up from June, 2008 to October, 2008, in the period.The researchers collected samples of PM10, PM2.5 and pretreated them by the methods such as soxhelt extraction, concentrated by Kuderna-Danish...
The volatile oils were extracted from Typha latifolia by Water-steam distillation. Components of the volatile oils were analyzed and identified by gas chromatograph-mass spectrometry (GC-MS), and the allelopathic effect of the volatile oils were also explored by bioassay of Microcystin aeruginosa. The results showed that the volatile oils had activity to inhibit the growth of M. aeruginosa. This study...
Hexane extracts of Potamogeton maackianus were fractionated using silica gel column chromatography under room pressure by antialgal activity-guidence. Ten fractions were obtained and three of them shown obvious antialgal activities. These three active fractions were further separated using gel chromatography (Sephadex LH-20). Then the active fractions Fr 3-5, 3-7 and 3-8 were obtained and their percentage...
Very little is known about analysis of distinguishing the Cold-Heat nature of Chinese herbs by multivariable statistics. We found a way of differentiating the Cold-Heat nature and discuss the relationship between polysaccharides and four nature of 20 Chinese herbs in order to identify the material basis of nature of Traditional Chinese Medicine. The polysaccharides from 20 herbs were extracted, hydrolyzed...
In this paper, the characteristics of the intermediates during Orange II degradation in UV-Fenton system were detected by UV-visible spectroscopy (UV-vis), total organic carbon (TOC), Fourier transform infrared spectroscopy (FTIR) and liquid chromatography-mass spectrometry (LC-MS). The results showed that the degradation of Orange II was consisted of dye discoloration, intermediates degradation and...
13 kinds of typical Environmental Endocrine Disruptors (EEDs) in human serum were detected by Gas Chromatography-Mass Spectrometry-Selected ion Monitoring (GC-MS-SIM) simultaneously, and thirty copies of female serum samples (aged from 10 to 45) collected in Sichuan province, China were detected based on this method. GC-MS-SIM detection, internal standard method, TMCE+TMCS derivatization were used...
In order to analysis of chlorogenic acid in Do-Zhong(Eucommia ulmoides), ultrasolic extraction was used to prepare the sample. With yield of chlorogenic acid as index. The effect of ethanol concentration, ultrasolic power, extraction time, and the ratio of solid to liquid were studied. The extracts were then analysis by high-performance liquid chromatographic (HPLC) method. The results shown that...
Gas chromatography-mass spectrometry (GC-MS) was used to study the compounds from ether extract of Catharsius molossus L., the traditional Chinese medicine, 'dung beetle'. Over twenty kinds of compounds from the ether extract were detected, and fifteen compounds whose match index was more than 800 were identified. All the identified compounds belonged to fatty acids, and the extract was rich in unsaturated...
Fractionation and purification of lignin form pulping black liquor by the organic acid precipitation method was studied in this paper to meet the demands of resource utilization of pulping black liquor. The narrow molecular weigh distribution fraction of lignin could be obtained by citric acid, as shown by gel permeation chromatography (GPC). The effects of reaction temperature, pH of acid evolution...
The new chemical method for identifying and quantifying Sudan I (1-[(2,4-dimethylphenyl)azo]-2-naphthalenol) from chilli species is devised to overcome the shortcoming with complex operation, longer analytical period of High performance liquid chromatography (HPLC) assay. Sudan I complexed with Cu2+ leads to the shift of visible absorption wavelength from 478 nm to 526 nm. The major product is the...
Soybean saponins have a lot of physiological activities and pharmacological action, and can be used to resist cancer, adjust immunity, prevent and treat cardiovascular diseases, and so on. However, the activities of soybean saponins in natural form are not the best. In this thesis, biotransformation of group B soybean saponins was studied to increase physiological activity of soybean saponins. The...
In the chromatographic process, the activation energy of solute migration determined solute migration velocity in the given condition. The rotational energy and vibrational energy of solute strongly influenced the activation energy of solute migration, and it caused the activation energy to change with temperature. These properties of migration activation energy were validated by the calculation of...
China has the rich bamboo resource, moreover, the species and yield of bamboo both are the first in the world. The extract of bamboo root was often used to cure some intractable diseases in the countryside of China, but the components of bamboo root extract is still unresolved. In order to expedite medicinal application of bamboo root, and to provide further scientific foundation for its top value-added...
The ozonation of three chloronitrobenzene isomers (p-, m-, o-chloro-nitrobenzene, CNB) were investigated. CNBs was effectively degraded by ozone but cloud not be mineralized completely. During the ozonation of CNBs process, the inorganic carbon, Cl- and NO3- increased gradually, and chloro-(-Cl) and nitro-(-NO2) group all turn to Cl- and NO3- calculated by stoichiometry. The degradation products of...
Profenophos, which has one chiral center and exists as two enantiomers, is a widely used organophosphorus insecticide. In this paper, the degradation of (±)-profenophos and (+)-profenophos in five soils was investigated using enantioselective high-performance liquid chromatography (HPLC). Our results showed that profenophos was degraded fast in soils with half-lives ranging from 4.2 h to 495.1 h....
Two degradation metabolites of benzo(a)pyrene(BaP), cis-BP4,5-dihydrodiol and cis-BP7,8-dihydrodiol, were identified using high performance liquid chromatography (HPLC) with standards. Both BaP and the two metabolites were well-known toxic compounds. The effect of a nonionic surfactant-Tween80 (TW80) on the degradation of the above three compounds by Bacillus-07, in aqueous phase, was studied. The...
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