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A comprehensive analytical method based on high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for measuring 6 exogenous endocrine disruptors--bisphenol diglycidyl ethers, including bisphenol A diglycidyl ether (BADGE), bisphenol A glycidyl (2,3-dihydroxypropyl) ether (BADGE x H2O), bisphenol A glycidyl (3-chloro-2-hydroxypropyl) ether ( BADGE x HCl), bisphenol A (3-chloro-2-hydroxypropyl) (2,3-dihydroxypropyl) ether (BADGE x H2O x HCl), bisphenol F diglycidyl ether (BFDGE) and bisphenol F bis (3-chloro-2-hydroxypropyl) ether (BFDGE x 2HCl). The samples were extracted with methyl tert-butyl ether (MTBE) by ultrasonic wave assistant extraction. The extracts were cleaned up and concentrated on multi-walled carbon nanotubes (MWCNTs). The target compounds were analyzed by HPLC-MS/MS under positive ion mode using a COSMOSIL C18 column as analytical column. Under the optimal conditions, the calibration curves showed a good linearity in the concentration range of 1.0-100.0 microg/L for 6 target compounds. The correlation coefficients (r2) were higher than 0.999 1. Recoveries of 6 analytes at three spiked levels ranged from 78.6% to 89.9%, with relative standard deviations (RSDs) less than 10%. The detection limits of the method ranged from 0.5 to 1.5 microg/L. The method is sensitive and simple, and is suitable for the rapid determination of the migration of bisphenol diglycidyl ethers from food contact materials.

Liu Y.F.,China Academy of Safety Science and Technology
Transit Development in Rock Mechanics-Recognition, Thinking and Innovation - Proceedings of the 3rd ISRM Young Scholars Symposium on Rock Mechanics, 2014 | Year: 2015

In order to achieve the purpose of early warning, a scientific and reasonable evaluation system of early warning is required to be established. Based on multi-source information obtained by monitoring surrounding rocks, this paper proposes three parameters as early warning indicators, namely, rock displacement, deformation rate and acceleration for deformation. First, it made a quantitative analysis and evaluation of the monitoring data, and used a variety of data smoothing methods or wavelet analysis for the diagnosing of monitoring data to determine the criteria for the safety of surrounding rocks. Then, it gave a consideration to the genetic mechanism of rock deformation and combined it with mathematical and statistical methods to establish a forecast model of monitoring data, thereby getting a system for monitoring, warning and evaluating the ground pressure. It has extremely important theoretical and practical significance for correctly predicting rock failure, effectively preventing accidents, and successfully warning accidents. © 2015 Taylor & Francis Group, London.

He X.,China Academy of Safety Science and Technology | Song L.,Anhui University of Science and Technology
Safety Science | Year: 2012

In general, contexts of coal mining safety involve technology, administration and socioeconomic environment as well. This paper presents statistical analysis of China coal mine accidents in recent years and analyzes the reasons causing coal mining high risk from technical and socioeconomic viewpoints. Social and economic reform has been unleashing social, economical factors that are driving a fundamental transformation of new workplace safety problems and making China coal mining safety take on Chinese features. Compared with major state-owned and local state-owned coalmines, township and village coalmines are most dangerous coal mines with highest occupational risks. The incidence and death toll of ceiling accidents are higher than those of accidents such as gas, machinery, electricity, transportation, flood, and fire. New organizational risks appeared with rapid development of state-owned coal mines' reorganization. Low skilled labors restrict both technical renovation and safety management. The Government has adopted a systematic arrangement to improve coal mining safety such as closing the township and village coalmines that cannot meet the standard of safety, reinforcing the supervision over coal mining safety, strengthening technological renovation and enhancing work safety input. © 2011 Elsevier Ltd.

Zhang S.,China Academy of Safety Science and Technology | Wu Z.,China Academy of Safety Science and Technology
Shiyou Xuebao/Acta Petrolei Sinica | Year: 2014

Selection of the route of long-distance oil and gas transmission pipeline is a complicated multi-target problem. Accident risk control and construction cost reduction are two major targets for such selection. By applying multi-target decision theoretical approach and with the route of acceptable risk and lower construction cost as optimization target, this paper puts forward an optimization method for selection of the route of long-distance oil and gas pipeline. By investigating the computation method for the optimized target, the paper analyzes the constraint conditions of such selection, determines the precision and range of grid division, and establishes the route selection optimization model. Subsequently, the model is solved by dynamic programming algorithm and a case study is demonstrated. The results show that, the risk-based route selection optimization method is feasible, individual risk criteria of long-distance oil and gas transmission pipeline and relocation of villages or buildings (structures) can serve as the constraint conditions for the selection. Defining the local topography and landform around special region helps to control individual risk. The weighting distribution of the two optimized targets needs adjustment according to actual conditions.

Kui Q.,China Academy of Safety Science and Technology
Beijing Gongye Daxue Xuebao/Journal of Beijing University of Technology | Year: 2011

Fire risk Forcasting and early warning is important to the fire protection of city. Computational Fluid Dynamics technology has been used for outdoor fire risk evaluations of fire hazard and smoke spreads in city center. The relationship between wind effect and the fire spread among buildings was studied by 3 cases simulation: winter case, summer case and a fire case. Fire safety status and trend analysis map was drawn. 5 grads alarm level was defined and recognized by colors and lines, which is useful for fire fighting, evacuation, and making of emergency advisory plan. Advises for emergency response management have been summarized based on study result.

He X.Z.,China Academy of Safety Science and Technology
Applied Mechanics and Materials | Year: 2014

The external anticorrosive coating is the shelter for preventing buried steel pipelines from corrosive damage. Many pipelines face severe corrosive problems because of the performance decrease of the coating, especially during long-term services. This situation usually causes safety accidents. Periodic inspection to the coating is an important way to ensure running safety. Aimed at the detecting technology, the methods for locating the pipelines and the means of on-line defects detecting with no excavation for the coating were studied and introduced. The ways for direction detecting, depth measuring and location coordinates detecting were pointed out. The basic principles of data analysis were also outlined. The various influences coming from external environment factors to the detecting results were analyzed. © (2014) Trans Tech Publications, Switzerland.

Zuo Z.,China Academy of Safety Science and Technology
Advanced Materials Research | Year: 2014

The risk of natural gas long-distance pipeline and main factors of accidents are analyzed in this paper. According the consequences from above, quantitative risk assessment of long-distance pipelines under specific accident scenarios are completed with the help of numerical simulation model on long-distance pipeline leakage and dispersion. What’s more, on the basis of the assessment results, the necessary conditions for long-distance pipeline safe operation are presented. Finally, conclusions and safe operations under necessary conditions given in this paper are helpful for regular operation of pipeline, accident prevention, emergency response and reasonable supervision. © (2014) Trans Tech Publications, Switzerland.

Wang F.,Nanjing University of Technology | Liu J.-H.,Nanjing Normal University | Li W.-M.,China Academy of Safety Science and Technology
Journal of Molecular Catalysis | Year: 2013

Epoxides being very useful and versatile intermediates for the synthesis of many commodities and fine chemicals, and many problems, such as high energy consumption and environmental pollution, existed in industrial production, which makes studies on styrene epoxidation by environmentally friendly methods is a subject of great interest from both academic and industrial points of view. A series of Au-silica (nanosphere) catalysts were prepared by in situ synthesis; highly dispersed gold nanoparticles (GNPs, 6.4 nm) were obtained, and catalytic tests showed good catalytic activity and epoxidation selectivity. The catalysts were characterized using X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS) and other instruments, combining with the investigation on the reactivities of styrene epoxidation, the preparation conditions of Au-silica catalysts were optimized.

Zuo Z.,China Academy of Safety Science and Technology
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | Year: 2015

In order to research evolutionary laws of unconfined vapor cloud explosion (UVCE) induced by combustible gas leak in long-distance oil and gas pipelines, Bayesian networks on buried pipelines corrosion leak fire were built by analyzing event nodes on inner and outer wall corrosion failure, combustible gas leak, the gas cloud diffusion and UVCE. The state ranges and discrete methods of node variables were studied. Priori probability and conditional probability distribution of the node variables were set by analyzing on accident statistics data and expert judgements. Bayesian network inference strategy was developed, the sensitivities of each network node variable on inference results were analyzed by researching on evolution mechanism of corrosion leak fire, and the rationality of the model was verified. The results show that there are greater uncertainty in the process of pipeline corrosion leaks and secondary disaster. The uncertainty presents in diverse intermediate event status value and probability of accident evolutionary path is influenced by the model input conditions. Bayesian network approach has a greater advantage to describe the dependency relations of accident intermediate nodes, and it can be used to measure uncertainties of accidents risk quantitatively. ©, 2015, Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science). All right reserved.

Liu X.,China Academy of Safety Science and Technology
Se pu = Chinese journal of chromatography / Zhongguo hua xue hui | Year: 2010

A simple and sensitive method for the determination of six synthetic sweeteners (sodium cyclamate, saccharin sodium, acesulfame-K, aspartame, alitame and neotame) in food was developed. The synthetic sweeteners were extracted by methanol-water (1 : 1, v/v). The extract was separated on a C18 column using 0.1% (v/v) formic acid-5 mmol/L ammonium formate/acetonitrile as mobile phase, and then detected by high performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) using multiple reaction monitoring (MRM) mode. The good linearities (r > 0.998) were achieved for all the analytes over the range of 20-500 microg/L. The recoveries obtained ranged from 81.3% to 106.0% at three spiked concentrations, with the relative standard deviations lower than 11%. The established method has been successfully applied to the determination of synthetic sweeteners in food.

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