Institute for Environmental Reference Materials of Ministry of Environmental Protection

Beijing, China

Institute for Environmental Reference Materials of Ministry of Environmental Protection

Beijing, China
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Li N.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Guo J.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Fan Q.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Wang S.-B.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | And 2 more authors.
Jiliang Xuebao/Acta Metrologica Sinica | Year: 2013

The development method of a chlorobenzene gas standard are described. Chlorobenzene gas standard is prepared by gravimetric method and is intercompared to the existing gas cylinder standards using gas chromatography with a hydrogen flame ionization detector. The linear regression analysis show excellent agreement among the standards for chlorobenzene. As a result of with-in homogeneity, the data show that chlorobenzen are homogeneous in the cylinder, the long-term stability of the gas standard is as long as 12 months. The certified value of developed chlorobenzene gas standard is 1~5 μmol/mol, and the relative expanded uncertainty is 5% at the 95% confidence interval for chorobenzene, it agree with the similar standard gas from Scott Specialty Gases.


Li N.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Wang Q.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Guo J.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Wang S.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | And 2 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2010

A method for the preparation of the standard gas mixture of 6 chlorinated hydrocarbons; containing dichloromethane, 1, 1 -dichloroethane, 1, 2-dichloroethane, chloroform; 1, 1, 1 -trichloroethane, and 1, 1, 2-trichloroethane, at the concentration of 5 μmol/mol in nitrogen was developed. The reproducibility of this method and the homogeneity and long-term stability of the standard mixture were evaluated. The results showed that all 6 chlorinated hydrocarbons have shown stability as long as 12 months and the expanded relative uncertainty of 5%. The certified value of developed standard gas agreed with the similar standard gas from Scott Specialty Gases. This research established a foundation for the analysis of volatile chlorinated hydrocarbon gases.


Fang L.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Feng Y.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Liu H.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Wu Z.,Institute for Environmental Reference Materials of Ministry of Environmental Protection
Chinese Journal of Chromatography (Se Pu) | Year: 2010

A method was developed for the determination of organochlorine pesticide (OCP) residues in soil/sediment using high resolution gas chromatography coupled with low resolution mass spectrometry. The analytical procedures consisted of Soxhlet extraction; sulfur removal with copper powder, clean-up with gel permeation chromatography (GPC) and a florisil column of solid phase extraction (SPE). The analytes were separated on an HP-5MS capillary column, detected in selected ion monitoring (SIM) mode and quantified using internal standard calibration curves of isotope dilution technique. The linear correlations of calibration standard solutions were good for all the OCPs. The recoveries and relative standard deviations of labeled compound solutions ranged from 60% to 110% and from 1. 5% to 18%, respectively. The limits of detection ranged from 0. 20 to 10. 3 μg/kg were established for the 23 OCPs. The method showed satisfactory clean-up effect and precision quantification. It is suitable for the determination and confirmation of pesticides in complex matrices such as soil, sediment.


Cao D.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Tian W.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Feng Y.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Liu H.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | And 2 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2010

The preparation method of new soil candidate certified reference materials ( CRM) for the analysis of organochlorine pesticides in soils has been developed. The soil sample was dried; ground; homogenized and packed. After Soxhlet extraction and Florisil purification; the organochlorine pesticides in soil candidate were further determined using gas chromatography-mass spectrometry. The results showed that the soil collected from Shenyang was an ideal soil candidate material for organochlorine pesticide analysis. This method established a foundation for the development of soil reference materials for the analysis of organochlorine pesticides.


Zhao Y.,Institute for Environmental Reference Materials of Ministry of Environmental Protection | Zhao Y.,CAS Research Center for Eco Environmental Sciences | Li Y.,CAS Research Center for Eco Environmental Sciences | Li Y.,University of Chinese Academy of Sciences | And 4 more authors.
Environmental Pollution | Year: 2016

This study aimed to investigate the accumulation of polybrominated diphenyl ethers (PBDEs) in the brain compared with that in other tissues among different vertebrates. We collected mice, chickens, ducks, frogs, and fish from an e-waste recycling region in Taizhou, China, and measured PBDE concentrations in brain, liver and muscle tissues. The levels of PBDE in the tissues of mice, chickens, ducks, frogs and fish ranged 0.45–206, 0.06–18.8, 1.83–112, 2.75–108, and 0.02–32.0 ng/g wet weight, respectively. Preferential distribution in the liver and muscle relative to the brain was observed for PBDEs in mice, chickens, ducks and frogs. However, a high retention in the brain compared to the liver and muscle was observed in fish. Comparison of the brain/liver concentration (B/L) ratios revealed differences in PBDEs accumulation in the brain among these vertebrates. PBDEs accumulation in the brain was greatest in fish, followed by frogs, while the lowest accumulation occurred in the brains of mammals and birds. The findings apparently coincided with the evolution of the blood-brain barrier (BBB) across vertebrates, i.e. the BBB of fish might be less efficient than those of mammals, birds and amphibian. Low brominated congeners (such as BDE-28, BDE-47 and BDE-99) were predominant in the brains of investigated vertebrates, whereas BDE-209 was most abundant in liver and muscle tissues of mice, chickens and ducks. Significant differences in B/L ratios among PBDE congeners were found in both mice and chickens (p < 0.05). Particularly in mice, the B/L ratios of PBDE congeners presented a declining trend with increased bromine number. Our findings suggested that low brominated congeners might have a higher capacity to penetrate the BBB and accumulate in the brain, whereas high brominated congeners such as BDE-209 might have less potency to pass through the barrier. Further experimental studies are needed to confirm our findings. © 2016 Elsevier Ltd


PubMed | Institute for Environmental Reference Materials of Ministry of Environmental Protection
Type: Journal Article | Journal: Se pu = Chinese journal of chromatography | Year: 2010

A method was developed for the determination of organochlorine pesticide (OCP) residues in soil/sediment using high resolution gas chromatography coupled with low resolution mass spectrometry. The analytical procedures consisted of Soxhlet extraction, sulfur removal with copper powder, clean-up with gel permeation chromatography (GPC) and a florisil column of solid phase extraction (SPE). The analytes were separated on an HP-5MS capillary column, detected in selected ion monitoring ( SIM) mode and quantified using internal standard calibration curves of isotope dilution technique. The linear correlations of calibration standard solutions were good for all the OCPs. The recoveries and relative standard deviations of labeled compound solutions ranged from 60% to 110% and from 1.5% to 18%, respectively. The limits of detection ranged from 0.20 to 10.3 microg/kg were established for the 23 OCPs. The method showed satisfactory clean-up effect and precision quantification. It is suitable for the determination and confirmation of pesticides in complex matrices such as soil, sediment.


PubMed | Institute for Environmental Reference Materials of Ministry of Environmental Protection
Type: Journal Article | Journal: Se pu = Chinese journal of chromatography | Year: 2010

The preparation method of new soil candidate certified reference materials (CRM) for the analysis of organochlorine pesticides in soils has been developed. The soil sample was dried, ground, homogenized and packed. After Soxhlet extraction and Florisil purification, the organochlorine pesticides in soil candidate were further determined using gas chromatography-mass spectrometry. The results showed that the soil collected from Shenyang was an ideal soil candidate material for organochlorine pesticide analysis. This method established a foundation for the development of soil reference materials for the analysis of organochlorine pesticides.


PubMed | Institute for Environmental Reference Materials of Ministry of Environmental Protection
Type: Journal Article | Journal: Se pu = Chinese journal of chromatography | Year: 2010

A method for the preparation of the standard gas mixture of 6 chlorinated hydrocarbons, containing dichloromethane, 1,1-dichloroethane, 1,2-dichloroethane, chloroform, 1,1, 1-trichloroethane, and 1,1,2-trichloroethane, at the concentration of 5 micromol/mol in nitrogen was developed. The reproducibility of this method and the homogeneity and long-term stability of the standard mixture were evaluated. The results showed that all 6 chlorinated hydrocarbons have shown stability as long as 12 months and the expanded relative uncertainty of 5%. The certified value of developed standard gas agreed with the similar standard gas from Scott Specialty Gases. This research established a foundation for the analysis of volatile chlorinated hydrocarbon gases.

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