[Objective]The content of total antimony(Sb) in fresh fruit was investigated and its pollution was evaluated,to provide the basic data for diet exposure evaluation.[Method]The content of total Sb in 194 samples was de...[Objective]The content of total antimony(Sb) in fresh fruit was investigated and its pollution was evaluated,to provide the basic data for diet exposure evaluation.[Method]The content of total Sb in 194 samples was detected by hydride generation-atomic fluorescence spectrometry(HG-AFS),and the Sb pollution in several fruits was evaluated by the method of single factor pollution index. [Result]The mean of total Sb was 0.005 6 mg / kg,and the median was 0.003 8mg / kg. The minimum value was not detected while the maximum value was 0.21 mg / kg,and the confidence interval was ND-0.019 mg / kg(P5-P95). The medians of total Sb content in different fruits successively were dragon fruit(0.011 0 mg / kg) > kiwi fruit(0.008 0 mg / kg) > peach(0.006 0 mg / kg). According to the method of single factor pollution index,the index from all samples was less than 0.2,suggesting that the samples involved were under the normal background value.[Conclusion]The Sb was detected in all samples but under the background value,and it was concluded that there was no Sb pollution in fresh fruit in Hunan Province.展开更多
[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass...[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass spectrometry and analyzed by single index and comprehensive index.[Results]The seven heavy metal elements showed good linearity in their respective concentration ranges.The recoveries of the samples were 84.5%-109.5%,and the RSD values were 2.30%-5.10%.Comparing the measured results of heavy metal elements with the limit values stipulated in the 2020 edition of the Chinese Pharmacopoeia and other standards,the Cr element in 19 batches of samples exceeded the standard,and the Zn element in 7 batches of samples exceeded the standard.The exceeding rates were 100.0%and 36.8%,respectively;the content of other heavy metal elements did not exceed the standard.The order of individual index from large to small was Cr,Zn,Cd,Hg,Cu,As,and Pb,and the average comprehensive pollution level was mild pollution and above.[Conclusions]L.christinae was mainly polluted by Cr,followed by Zn;this study can provide basic data for drafting of the limit standard for heavy metal elements in L.christinae.展开更多
[Objective] The paper was to evaluate the water quality environment in Dachangshan artificial habitat development demonstration area.[Method] From 2013 to 2015, an environmental survey was conducted for eight voyages ...[Objective] The paper was to evaluate the water quality environment in Dachangshan artificial habitat development demonstration area.[Method] From 2013 to 2015, an environmental survey was conducted for eight voyages in Dachangshan artificial habitat development demonstra-tion area of Changhai County, Dalian City, and 20 hydrochemical indexes including salinity, p H, and COD were monitored. The water quality of the sea area was analyzed by principal component analysis and single factor index method. [Result] Except for that the control area of the August 2014 voyage belonged to II-class sea water standard, the water quality in other stations of all voyages conformed to I-class sea water standard. Totally 20 water quality indicators were synthesized into six principal components using principal component analysis, which explained 79.165% of the results;the principal component score was ranged from-1.536 to 3.706; the score in August 2014 was the highest, and the evaluation results were basically consistent with the results of single factor index analysis. [Conclusion] The overall water quality is good in Dachangshan artificial habitat development demonstration area.展开更多
基金Supported by Scientific Research Project of Medicine and Health Care in Hunan Province(B2014-162)Scientific Research Project of Xiangtan Science and Technology Bureau(SF20141003)
文摘[Objective]The content of total antimony(Sb) in fresh fruit was investigated and its pollution was evaluated,to provide the basic data for diet exposure evaluation.[Method]The content of total Sb in 194 samples was detected by hydride generation-atomic fluorescence spectrometry(HG-AFS),and the Sb pollution in several fruits was evaluated by the method of single factor pollution index. [Result]The mean of total Sb was 0.005 6 mg / kg,and the median was 0.003 8mg / kg. The minimum value was not detected while the maximum value was 0.21 mg / kg,and the confidence interval was ND-0.019 mg / kg(P5-P95). The medians of total Sb content in different fruits successively were dragon fruit(0.011 0 mg / kg) > kiwi fruit(0.008 0 mg / kg) > peach(0.006 0 mg / kg). According to the method of single factor pollution index,the index from all samples was less than 0.2,suggesting that the samples involved were under the normal background value.[Conclusion]The Sb was detected in all samples but under the background value,and it was concluded that there was no Sb pollution in fresh fruit in Hunan Province.
基金Supported by Risk Monitoring Task Project of Chongqing Drug Administration in 2020。
文摘[Objectives]To detect content of Pb,Cd,Hg,As,Cu,Zn,and Cr in Lysimachia christinae,and to analyze the pollution level.[Methods]Seven kinds of elements in L.christinae were determined by Inductively coupled plasma mass spectrometry and analyzed by single index and comprehensive index.[Results]The seven heavy metal elements showed good linearity in their respective concentration ranges.The recoveries of the samples were 84.5%-109.5%,and the RSD values were 2.30%-5.10%.Comparing the measured results of heavy metal elements with the limit values stipulated in the 2020 edition of the Chinese Pharmacopoeia and other standards,the Cr element in 19 batches of samples exceeded the standard,and the Zn element in 7 batches of samples exceeded the standard.The exceeding rates were 100.0%and 36.8%,respectively;the content of other heavy metal elements did not exceed the standard.The order of individual index from large to small was Cr,Zn,Cd,Hg,Cu,As,and Pb,and the average comprehensive pollution level was mild pollution and above.[Conclusions]L.christinae was mainly polluted by Cr,followed by Zn;this study can provide basic data for drafting of the limit standard for heavy metal elements in L.christinae.
基金Supported by Special Fund for Scientific Research (Marine) in the Public Interest(201205023)Nation Key Technology R&D Program(2012BAD18B02,2015BAD13B05)
文摘[Objective] The paper was to evaluate the water quality environment in Dachangshan artificial habitat development demonstration area.[Method] From 2013 to 2015, an environmental survey was conducted for eight voyages in Dachangshan artificial habitat development demonstra-tion area of Changhai County, Dalian City, and 20 hydrochemical indexes including salinity, p H, and COD were monitored. The water quality of the sea area was analyzed by principal component analysis and single factor index method. [Result] Except for that the control area of the August 2014 voyage belonged to II-class sea water standard, the water quality in other stations of all voyages conformed to I-class sea water standard. Totally 20 water quality indicators were synthesized into six principal components using principal component analysis, which explained 79.165% of the results;the principal component score was ranged from-1.536 to 3.706; the score in August 2014 was the highest, and the evaluation results were basically consistent with the results of single factor index analysis. [Conclusion] The overall water quality is good in Dachangshan artificial habitat development demonstration area.
