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27 results on '"Xie, Qilai"'

16. Trace Fossils from Lower Cambrian Wusongger Formation in Xiaoerbulake Outcrop, Kalpin Area, Xinjiang

Author

Liu Xiaoping, Bai Zhongkai, WU Jianjun, Xie Qilai, LI Jianjiao, and Lü Xiuxiang

Subjects
Paleontology, Waves and shallow water, Ophiomorpha, Planolites, biology, Outcrop, Helminthopsis, Geology, Ichnofacies, Trace fossil, Cruziana, biology.organism_classification
Abstract

Based on the analysis of trace fossils collected from the typical outcrop of the Lower Cambrian Wusongger Formation in the Kalpin area, ten ichnospecies of six ichnogenus were identified in the upper member of the Wusongger Formation, with most of them being found for the first time. The trace fossils are described seriatim. The ichnospecies are mainly represented by such common trace fossils as Ophiomorpha nodosa, Helminthopsis hieroglyphica, Helminthopsis ichnosp., Planolites beverleyensis, Planolites vulgaris, Planolites montanus, Palaeophycus striatus, Palaeophycus curvatus?, Cochlichnus anguineus and Rituichnus elongatum. The trace fossils are of high diversity and low abundance, and can be diagnosed as the Cruziana ichnofacies. They can be interpreted as having formed in a shallow water environment.

Published
2012

20. Mechanism of Silurian hydrocarbon pool formation in the Tarim Basin

Author

Zhao Yande, Li Shuangwen, Zhao Suping, Li Yan, Guo Yongqiang, Xie Qilai, Chen Lixin, Huo Hong, Liu Luofu, Chen Yuanzhuang, Li Chao, and Pang Xiongqi

Subjects
chemistry.chemical_classification, Geochemistry, Energy Engineering and Power Technology, Tarim basin, Geology, Geotechnical Engineering and Engineering Geology, Mineral resource classification, Geophysics, Fuel Technology, Hydrocarbon, chemistry, Geochemistry and Petrology, Economic Geology, Geomorphology
Abstract

There are three formation stages of Silurian hydrocarbon pools in the Tarim Basin. The widely distributed asphaltic sandstones in the Tazhong (central Tarim) and Tabei (northern Tarim) areas are the results of destruction of hydrocarbon pools formed in the first-stage, and the asphaltic sandstones around the Awati Sag were formed in the second-stage. The hydrocarbon migration characteristics reflected by the residual dry asphalts could represent the migration characteristics of hydrocarbons in the Silurian paleo-pools, while the present movable oil in the Silurian reservoirs is related to the later-stage (the third-stage) hydrocarbon accumulation.

Published
2007

27. [Simultaneous determination of nine pharmaceuticals personal care products in waters by solid phase extraction-gas chromatography-mass spectrometry].

Author

Jia Y, Tan J, Xu C, Tang J, Wang Y, and Xie Q

Subjects
Acetaminophen, Agricultural Irrigation, Benzhydryl Compounds, Clofibric Acid, Diclofenac, Ibuprofen, Ketoprofen, Naproxen, Phenols, Salicylic Acid, Solid Phase Extraction, Triclosan, Gas Chromatography-Mass Spectrometry, Water analysis, Water Pollutants, Chemical analysis
Abstract

An analytical method has been developed and validated for the simultaneous determination of nine pharmaceuticals and personal care products (PPCPs) in water samples, including salicylic acid, naproxen, ibuprofen, paracetamol, clofibric acid, triclosan, diclofenac, ketoprofen, bisphenol A. The qualification and quantification of the target compounds were performed by gas chromatography-mass spectrometry in selected ion monitoring mode (GC-MS-SIM). The water samples were concentrated and purified through Oasis HLB cartridges after the pH value of the water was adjusted to 3, then derivatized with trimethyl sulfonium hydroxide (TMSH) at room temperature, and determined by GC-MS-SIM using 2,4,5-fenoprop as internal standard. The conditions for sample pretreatment (e. g. solid phase extraction and derivatization) were studied. Under the optimized conditions, the recoveries were ranged from 50.7% to 115.4% with the relative standard deviations lower than 10%. The limits of detection were in the range of 0.03-0.30 microg/L and the limits of quantification were in the range of 0.15-1.50 microg/L. The method has been successfully applied to monitor the occurrence of the PPCPs residues in agricultural irrigation water in Dongguan, Guangdong Province. The four compounds were detected at maximum mass concentration range of 0.176-0.998 microg/L. It proved that this analytical method is sensitive, reliable and acceptable.

Published
2014
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