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Chen X.,Institute of Environmental Health & Related Products Safety | Du P.,Institute of Environmental Health & Related Products Safety | Guan Q.,Centers for Disease Control and Prevention | Feng X.,Shimadzu Corporation China | And 2 more authors.
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2015

To investigate the characteristics of chemical constitute and pollution sources of aerosol fine particulate matter during haze-fog day in Beijing in winter 2013. The samples of PM2.5 were collected in Beijing from January to February, 2013. The technique of ICP-MS and ICP-AES coupled with procedure of bathing-ultrasonic extraction was applied to determine the concentration of 40 elements in the aerosol samples to analyze the characteristics of elements distribution statistically. The absolute principal factor method was used to apportion the pollution sources of PM2.5 during the haze weather in Beijing city in winter 2013. The results showed that during the period of sampling, the volume concentration of Li, Mn, Pb, S etc. obeyed normal distribution approximately, and according to National Ambient Air Quality Standard issued by Ministry of Environmental Protection of the People's Republic of China, the geometric mean concentration of As was twice the annual limit of standard reference, while Pb of some aerosol samples beyond the annual limit of standard reference respectively. The mass fraction of Fe, Zn, Pb, Ti accounted for over 0.1%, while that of Mn, Cu, As, Se etc. 0.01%. These elements were primary inorganic pollutants, and especially the hazards and sources of As and Pb should be concerned. There were 6 main pollution sources were chosen by the factor analysis method, including industrial dust and human beings activities, biomass combustion and building dust, soil and sand dusts, fossil fuel, electronic waste and metal smelting, with the variance contribution rate of 40.3%, 27.0%, 9.1%, 4.9%, 4.8% and 4.6% respectively. ICP-MS and ICP-AES can be applied to analyzing multi-elements in PM2.5 accurately and quickly to facilitate source apportionment, and it indicated that the relevant pollution sources should be considered and the effect of regional transferring of haze pollution sources should be taken into account, and specific measures should be taken for control. ©, 2015, Science Press. All right reserved.


Chen X.,Institute of Environmental Health & Related Products Safety | Zhang M.,Institute of Environmental Health & Related Products Safety | Fu H.,Institute of Environmental Health & Related Products Safety | Xu C.,Institute of Environmental Health & Related Products Safety | Lin S.,Institute of Environmental Health & Related Products Safety
Wei sheng yan jiu = Journal of hygiene research | Year: 2013

OBJECTIVE: To establish the method which determined the content of chromium(Cr) in capsule by inductively coupled plasma-mass spectrometry.METHODS: Pre-digestion-microwave digestion procedures were applied to extract Cr from the capsules. The potentially interfering 40Ar12C+ and 37Cl16O+ at the chromium masses m/z 52 and 53 were reduced in intensity by approximately 2 orders of magnitude by using 0. 6 ml/min NH3 as reactive cell gas in the dynamic reaction cell (DRC) while a Rpq value of 0.55 was used.RESULTS: The correlation coefficient (r) of standard curve was 0.9996, and the detection limit of the method was 0.03 mg/kg, and the average recoveries for all determinations ranged from 86.5% to 107.8% with the related standard deviation below 5%.CONCLUSION: The method, which is of good precision and accuracy, is applicable to rapid and accurate determination of chromium content in capsule.


Wang H.,Institute of Environmental Health & Related Products Safety | Chen X.,Institute of Environmental Health & Related Products Safety | Mou S.,Institute of Environmental Health & Related Products Safety | Zheng H.,Institute of Environmental Health & Related Products Safety | And 2 more authors.
Wei sheng yan jiu = Journal of hygiene research | Year: 2012

OBJECTIVE: A method for determination of nitrate (NO3(-)) and sulfate (SO4(2-)) in air of residential areas by ion-chromatography (IC) was established.METHODS: The anions in aerosol samples collected with filter member were extracted by ultrasonic leaching and separated on IonPac AS11-HC analytical column and IonPac AG11-HC guard column with 20.0 mmol/L potassium hydroxide eluted at 1.00 ml/min, and then detected by DS6 suppressed conductivity detector, with the satisfactory determination of atmospheric nitrate and sulfate.RESULTS: The correlation coefficient of nitrate and sulfate were greater than 0.9999. The quantification limit of NO3(-) and SO4(2-) was 0.011 microg/m3 and 0.024 microg/m3 respectively. The sampling filter members were divided into four parts equally and spiked, and the recoveries of nitrate and sulfate were 99.6% - 105.6%. The relative standard deviation (RSD) of nitrate and sulfate were less than 3%.CONCLUSION: The method was simple, rapid, reproductive and sensitive for determination of nitrate and sulfate in air of residential areas.


PubMed | Institute of Environmental Health & Related Products Safety
Type: Journal Article | Journal: Guang pu xue yu guang pu fen xi = Guang pu | Year: 2011

In the present paper, the method for determining the trace elements Be, Cd, As and Pb in air of residential areas by inductively coupled plasma-mass spectrometry was established. Ultrasonic leaching procedures were applied to extract the trace elements from the filter membrane of the atmospheric particulates. The operating condition of the instrument was optimized. 72Ge, 115s In and 204Tl were chosen as the internal elements and the effect of matrix, interface and fluctuation of instrument was overcome effectively. Satisfactory linearity of working curves of four elements was obtained, giving all the correlation coefficients over 0.9995, and the detection limit of the method was between 0.006 and 0.045 ng x m(-3). The mean values of National Standard Reference Material GBW(E)080212 were in agreement with the certified values. The sampling filters membranes, divided into four equal parts and with added standard solution with different concentions were analyzed, and the recovery rate of samples were in the range of 91.6%-109.7% with the related standard deviation between 0.7% and 4.8%. The obtained results showed that the method of determining the trace elements Be, Cd, As and Pb in air of residential areas by inductively coupled plasma-mass spectrometry proved to be simple, accurate, sophisticated and stable.


PubMed | Institute of Environmental Health & Related Products Safety
Type: Journal Article | Journal: Wei sheng yan jiu = Journal of hygiene research | Year: 2012

A method for determination of nitrate (NO3(-)) and sulfate (SO4(2-)) in air of residential areas by ion-chromatography (IC) was established.The anions in aerosol samples collected with filter member were extracted by ultrasonic leaching and separated on IonPac AS11-HC analytical column and IonPac AG11-HC guard column with 20.0 mmol/L potassium hydroxide eluted at 1.00 ml/min, and then detected by DS6 suppressed conductivity detector, with the satisfactory determination of atmospheric nitrate and sulfate.The correlation coefficient of nitrate and sulfate were greater than 0.9999. The quantification limit of NO3(-) and SO4(2-) was 0.011 microg/m3 and 0.024 microg/m3 respectively. The sampling filter members were divided into four parts equally and spiked, and the recoveries of nitrate and sulfate were 99.6% - 105.6%. The relative standard deviation (RSD) of nitrate and sulfate were less than 3%.The method was simple, rapid, reproductive and sensitive for determination of nitrate and sulfate in air of residential areas.

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