Analyses on Hydrophily and Lipophilicity of Dust in Shanghai Different Traffic Concentration Areas

Based on process optimizing, in this article the dust was made a extraction analysis to investigate the ratio of lipophilic substances, which was collected in shanghai different traffic concentration areas. Also, the samples was made a infrared spectroscopy analysis to investigate the organic groups contained. It illustrates that the ratio of lipophilicity in traffic-intensive areas is higher up to 90.1 percent than in living area which is 33.5 percent, those of Shanghai suburb is the littlest, only 12.3 percent. the main functional groups of dust in Shanghai traffic-intensive areas are amino, associating hydroxyl, benzene ring, alkyl and-SH, which is similar to the main component of organic pollutants in motor vehicle exhaust.

Download Full-text

Removing Mechanism of Bacteria of LKD in Bauxite Flotation Separation

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.454.246 ◽

2012 ◽

Vol 454 ◽

pp. 246-250

Author(s):

Shu Yong Yang ◽

Shu Juan Dai ◽

Lian Tao Yu ◽

Li Jia Deng

Keyword(s):

Infrared Spectroscopy ◽

Functional Groups ◽

Infrared Spectra ◽

Electric Potential ◽

Strong Acid ◽

Weak Acid ◽

Reverse Flotation ◽

Spectroscopy Analysis ◽

Acid Ph ◽

Neutral Conditions

The depressing function of bacteria of LKD on diaspore and kaolinite is studied through flotation experiments, mineral ζ-electric potential and infrared spectroscopy analysis. Waste beer has better selective and depressing effects on diaspore in the range pH 2-10 than starch-like substances do. The analysis of mineral ζ-electric potential and infrared spectra shows that the bacteria of LKD is chemically adsorbed to diaspore via its –COOH and stays on the surface of mineral firmly. Meanwhile, the functional groups -OH of yeast itself and some -COOH are hydrophilic, which helps the mineral being hydrophilic as well. Although the structure of phyllosilicate kaolinite determines its good floatability on the condition of strong acid, the recovery of diaspore by yeast is 30% more than kaolinite when the diaspore is depressed by bacteria of LKD on the condition of weak acid, pH-6. It indicates the possibility of Al-Si separation by reverse-flotation under neutral conditions.

Download Full-text

Investigation of stingray spines by Fourier transform infrared spectroscopy analysis to recognize functional groups

Journal of Coastal Life Medicine ◽

10.12980/jclm.1.2013j19 ◽

2013 ◽

Keyword(s):

Fourier Transform ◽

Infrared Spectroscopy ◽

Fourier Transform Infrared Spectroscopy ◽

Functional Groups ◽

Fourier Transform Infrared ◽

Spectroscopy Analysis

Download Full-text

Selective determination of non-biodegradable polar, organic pollutants in waste water related to functional groups using flow injection combined with tandem mass spectrometry

Water Science & Technology ◽

10.2166/wst.1996.0597 ◽

1996 ◽

Vol 34 (7-8) ◽

pp. 21-28 ◽

Cited By ~ 5

Author(s):

H. Fr. Schröder

Keyword(s):

Mass Spectrometry ◽

Tandem Mass Spectrometry ◽

Functional Groups ◽

Organic Pollutants ◽

Molar Mass ◽

Sewage Treatment ◽

Tandem Mass ◽

Screening Process ◽

Selective Determination ◽

Characteristic Fragment

Effluents of biological sewage treatment plants mainly contain non-biodegradable, polar, organic pollutants of biogenic and anthropogenic origin. This paper presents a substance-specific determination method for these compounds, which are partly able to reach drinking water during the soil filtration process. Tandem mass spectrometry (MS/MS) combined with softly ionizing interfaces is applied for this purpose. The behaviour of the functional groups of these pollutants - forming characteristic fragment ions under MS/MS conditions and abstracting neutral particles - is used for detection. With help from this screening process on specific functional groups it is possible to establish the presence of substance groups with similar behaviour in the aquatic environment. Additionally this analytical procedure provides information on the molar mass of the pollutants detected. In a second step the compounds characterized by the molar mass and belonging to a group of pollutants with specific functional groups can be identified using MS/MS.

Download Full-text

Application of Near-Infrared Spectroscopy Analysis Technology to Total Nucleosides Quality Control in the Fermented Cordyceps Powder Production Process

Journal of Analytical Methods in Chemistry ◽

10.1155/2020/8850437 ◽

2020 ◽

Vol 2020 ◽

pp. 1-9

Author(s):

Tiannv Shi ◽

Yongmei Guan ◽

Lihua Chen ◽

Shiyu Huang ◽

Weifeng Zhu ◽

...

Keyword(s):

Quality Control ◽

Infrared Spectroscopy ◽

Production Process ◽

Process Monitoring ◽

Near Infrared Spectroscopy ◽

Near Infrared ◽

Powder Preparation ◽

Spectroscopy Analysis ◽

Online Process Monitoring ◽

Online Process

Product quality control is a prerequisite for ensuring safety, effectiveness, and stability. However, because of the different strain species and fermentation processes, there was a significant difference in quality. As a result, they should be clearly distinguished in clinical use. Among them, the fermentation process is critical to achieving consistent product quality. This study aims to introduce near-infrared spectroscopy analysis technology into the production process of fermented Cordyceps powder, including strain culture, strain passage, strain fermentation, strain filtration, strain drying, strain pulverizing, and strain mixing. First, high performance liquid chromatography (HPLC) was used to measure the total nucleosides content in the production process of 30 batches of fermented Cordyceps powder, including uracil, uridine, adenine, guanosine, adenosine, and the process stability and interbatch consistency were analyzed with traditional Chinese medicine (TCM) fingerprinting, followed by the near-infrared spectroscopy (NIRS) combined with partial least squares regression (PLSR) to establish a quantitative analysis model of total nucleosides for online process monitoring of fermented Cordyceps powder preparation products. The model parameters indicate that the established model with good robustness and high measurement precision. It further clarifies that the model can be used for online process monitoring of fermented Cordyceps powder preparation products.

Download Full-text