Satoshi Nakamura, S. Mizutani, Kohei Yamazaki, K. Noro, Y. Yabuki
Ministry of the Environment and economic census data, the release amount was prorated for each municipality in Japan, and each daily stock amount was estimated using the method of the previous research based on above release amount data. In some municipalities, there were cases where the daily stock amount in those factories and workplaces was more than that in PRTR notified ones, and it seems that daily attention to those factories and workplaces is also necessary as a preparation for disasters and accidents.
{"title":"Estimation of Daily Stock Amount of Chemical Substances in Factories and Workplaces Below-threshold-condition of PRTR in Municipalities Nationwide","authors":"Satoshi Nakamura, S. Mizutani, Kohei Yamazaki, K. Noro, Y. Yabuki","doi":"10.5985/jec.31.120","DOIUrl":"https://doi.org/10.5985/jec.31.120","url":null,"abstract":"Ministry of the Environment and economic census data, the release amount was prorated for each municipality in Japan, and each daily stock amount was estimated using the method of the previous research based on above release amount data. In some municipalities, there were cases where the daily stock amount in those factories and workplaces was more than that in PRTR notified ones, and it seems that daily attention to those factories and workplaces is also necessary as a preparation for disasters and accidents.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78411910","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shingo Hirao, H. Hasegawa, K. Mori, Hidetomo Yamamori
An analytical method for polycarbamate in sediment by liquid chromatography tandem-mass spectrometry (LC-MS / MS) was developed. In this method, polycarbamate in sediment is methylated to ethylenebis dithiocarbamate dimethyl (EBDC- 2 Me) and dimethyldithiocarbamate methyl (DMDC-Me). Concentrations of polycarbamate are calculated from that of EBDC- 2 Me. The method detection limit (MDL) and method quantification limit (MQL) were 0 . 94 ng / g-dry and 2 . 57 ng / g-dry, respectively. The average recovery rate from sediment were 77 . 8 % with a relative standard deviation (RSD) of 2 . 1 %. Recovery rate was improved by the addition of methanol as solvent extraction in the case of organic-rich sediments. Polycarbamate added to sediment was completely lost for a day of preservation. In contrast, polycarbamate added to the crude extract was almost stable for three days of preservation, while it was completely lost for seven days of preservation. The concentrations of polycarbamate in the river and sea sediments sampled at Nagoya city were below the MDL.
建立了液相色谱串联质谱法(LC-MS / MS)分析沉积物中聚氨基甲酸酯的方法。在这种方法中，沉淀物中的聚氨基甲酸酯被甲基化成乙二硫代氨基甲酸二甲基(EBDC- 2 Me)和二甲基二硫代氨基甲酸二甲基(DMDC-Me)。聚氨基甲酸酯的浓度由EBDC- 2me计算得到。方法检出限(MDL)和定量限(MQL)均为0。94纳克/克干和2。57 ng / g-dry。沉积物平均回收率为77。8%，相对标准偏差(RSD)为2。1%。在富有机物沉积物中加入甲醇作为溶剂萃取，提高了萃取回收率。将聚氨基甲酸酯添加到沉积物中，在保存一天后完全消失。相比之下，添加到粗提物中的聚氨基甲酸酯在保存3天内几乎是稳定的，而在保存7天时则完全丢失。在名古屋市采样的河流和海洋沉积物中聚氨基甲酸酯的浓度低于MDL。
{"title":"A Study on the Development of Analytical Method for Polycarbamate by LC-MS/MS and its Decomposition Property in Sediment","authors":"Shingo Hirao, H. Hasegawa, K. Mori, Hidetomo Yamamori","doi":"10.5985/JEC.31.47","DOIUrl":"https://doi.org/10.5985/JEC.31.47","url":null,"abstract":"An analytical method for polycarbamate in sediment by liquid chromatography tandem-mass spectrometry (LC-MS / MS) was developed. In this method, polycarbamate in sediment is methylated to ethylenebis dithiocarbamate dimethyl (EBDC- 2 Me) and dimethyldithiocarbamate methyl (DMDC-Me). Concentrations of polycarbamate are calculated from that of EBDC- 2 Me. The method detection limit (MDL) and method quantification limit (MQL) were 0 . 94 ng / g-dry and 2 . 57 ng / g-dry, respectively. The average recovery rate from sediment were 77 . 8 % with a relative standard deviation (RSD) of 2 . 1 %. Recovery rate was improved by the addition of methanol as solvent extraction in the case of organic-rich sediments. Polycarbamate added to sediment was completely lost for a day of preservation. In contrast, polycarbamate added to the crude extract was almost stable for three days of preservation, while it was completely lost for seven days of preservation. The concentrations of polycarbamate in the river and sea sediments sampled at Nagoya city were below the MDL.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"141 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80061664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.37421/2380-2391.21.8.312
Sowmya Sakinala
{"title":"Editorial on Mass Spectrometry","authors":"Sowmya Sakinala","doi":"10.37421/2380-2391.21.8.312","DOIUrl":"https://doi.org/10.37421/2380-2391.21.8.312","url":null,"abstract":"","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"43 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74143980","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2021-01-01DOI: 10.37421/2380-2391.2021.8.328
A. Saljooqi
{"title":"Editorial Note on Analytical Chemistry and Its Applications","authors":"A. Saljooqi","doi":"10.37421/2380-2391.2021.8.328","DOIUrl":"https://doi.org/10.37421/2380-2391.2021.8.328","url":null,"abstract":"","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"1 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87892546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Anh Quoc Hoang, Tuyến Hữu Lê, M. Tu, Shin Takahashi
Polycyclic aromatic hydrocarbons (PAHs) are organic pollutants of global concern due to their environmental abundance, persistence, and high toxicity. In the late 1970s, the US Environmental Protection Agency proposed a set of 16 priority PAHs (PAH16), which has a strong influence on the monitoring studies and toxicity testing of this pollutant class until now. However, PAHs exist in the environment as complex mixtures with a variety of unsubstituted and substituted compounds. Levels and/or toxicity of several high-molecular-weight (HMW) PAHs and PAH-related compounds (e.g., alkylated, oxygenated, nitrated, and heterocyclic derivatives) may be comparable to or even surpass those of PAH16, suggesting the need of a more comprehensive monitoring scheme for this pollutant class. Among PAH Characterization of Unsubstituted and Methylated Polycyclic Aromatic Hydrocarbons and Screening of Potential Organic Compounds in Solid Waste and Environmental Samples by Gas Chromatography–Mass Spectrometry
{"title":"Characterization of Unsubstituted and Methylated Polycyclic Aromatic Hydrocarbons and Screening of Potential Organic Compounds in Solid Waste and Environmental Samples by Gas Chromatography–Mass Spectrometry","authors":"Anh Quoc Hoang, Tuyến Hữu Lê, M. Tu, Shin Takahashi","doi":"10.5985/jec.30.82","DOIUrl":"https://doi.org/10.5985/jec.30.82","url":null,"abstract":"Polycyclic aromatic hydrocarbons (PAHs) are organic pollutants of global concern due to their environmental abundance, persistence, and high toxicity. In the late 1970s, the US Environmental Protection Agency proposed a set of 16 priority PAHs (PAH16), which has a strong influence on the monitoring studies and toxicity testing of this pollutant class until now. However, PAHs exist in the environment as complex mixtures with a variety of unsubstituted and substituted compounds. Levels and/or toxicity of several high-molecular-weight (HMW) PAHs and PAH-related compounds (e.g., alkylated, oxygenated, nitrated, and heterocyclic derivatives) may be comparable to or even surpass those of PAH16, suggesting the need of a more comprehensive monitoring scheme for this pollutant class. Among PAH Characterization of Unsubstituted and Methylated Polycyclic Aromatic Hydrocarbons and Screening of Potential Organic Compounds in Solid Waste and Environmental Samples by Gas Chromatography–Mass Spectrometry","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87267208","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/2380-2391.2020.7.285
C. Mounica
The start of 2020, 'super year of biodiversity' and crunch year for atmosphere arrangements, has brought a grievous showing of the association of atmosphere and biodiversity emergencies
{"title":"Editorial Note on Biodiversity","authors":"C. Mounica","doi":"10.37421/2380-2391.2020.7.285","DOIUrl":"https://doi.org/10.37421/2380-2391.2020.7.285","url":null,"abstract":"The start of 2020, 'super year of biodiversity' and crunch year for atmosphere arrangements, has brought a grievous showing of the association of atmosphere and biodiversity emergencies","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"759 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85422890","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2020-01-01DOI: 10.37421/2380-2391.2020.7.282
C. Mounica
In non-industrial nations, ecological contamination by manufactured polymers has accepted risky extents. Oil determined plastics are not promptly biodegradable and due to their protection from microbial corruption, they aggregate in the climate.
{"title":"Editorial on Biodegradable Polymers","authors":"C. Mounica","doi":"10.37421/2380-2391.2020.7.282","DOIUrl":"https://doi.org/10.37421/2380-2391.2020.7.282","url":null,"abstract":"In non-industrial nations, ecological contamination by manufactured polymers has accepted risky extents. Oil determined plastics are not promptly biodegradable and due to their protection from microbial corruption, they aggregate in the climate.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"27 1","pages":"1-1"},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83080003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Regarding Cr (VI) measurement by an iron coprecipitation operation, we found an effluent sample with a low recovery rate. Note 11 of JIS K 0102: 2016 65.2 Cr (VI) has no detailed description of the operation, so we explored an optimal operating conditions using ultrapure water. In addition, since the dominant Cr valence depends on the pH and Eh of the solution, a recovery test was performed using ultrapure water whose pH and Eh were adjusted with sodium sulfite. As the amount of sodium sulfate was added, the pH was increased while Eh was decreased, and the recovery rate of Cr (VI) was decreased, it was confirmed that pH, Eh, and reducing substance are related to the recovery rate of Cr (VI). In the Ehadjusted sample, it was confirmed that the recovery rate was improved by adding ammonia water before the addition of recovery standard solution. Based on the results of these studies, an effluent sample with a low recovery rate was subjected to aeration to adjust the Eh, and ammonia water was added first so that the pH did not become acidic during the iron coprecipitation operation. The recovery test confirmed that Eh and the recovery rate were increased with the longer aeration duration. Therefore, if the actual sample is reduced condition, an aeration treatment in addition to particle coagulation period, filtration temperature, and reagent addition sequence improves the recovery rate of Cr (VI) and makes it possible to evaluate appropriately.
{"title":"Study on Analytical Method for Improving Recovery Rate in Cr (VI) Measurement by an Iron Coprecipitation Operation of an Effluent Sample","authors":"Takaoki Koga, Shusaku Hirakawa, Yuko Ishibashi","doi":"10.5985/jec.30.140","DOIUrl":"https://doi.org/10.5985/jec.30.140","url":null,"abstract":"Regarding Cr (VI) measurement by an iron coprecipitation operation, we found an effluent sample with a low recovery rate. Note 11 of JIS K 0102: 2016 65.2 Cr (VI) has no detailed description of the operation, so we explored an optimal operating conditions using ultrapure water. In addition, since the dominant Cr valence depends on the pH and Eh of the solution, a recovery test was performed using ultrapure water whose pH and Eh were adjusted with sodium sulfite. As the amount of sodium sulfate was added, the pH was increased while Eh was decreased, and the recovery rate of Cr (VI) was decreased, it was confirmed that pH, Eh, and reducing substance are related to the recovery rate of Cr (VI). In the Ehadjusted sample, it was confirmed that the recovery rate was improved by adding ammonia water before the addition of recovery standard solution. Based on the results of these studies, an effluent sample with a low recovery rate was subjected to aeration to adjust the Eh, and ammonia water was added first so that the pH did not become acidic during the iron coprecipitation operation. The recovery test confirmed that Eh and the recovery rate were increased with the longer aeration duration. Therefore, if the actual sample is reduced condition, an aeration treatment in addition to particle coagulation period, filtration temperature, and reagent addition sequence improves the recovery rate of Cr (VI) and makes it possible to evaluate appropriately.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"21 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81237306","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Microplastics (MP) can cause damage to ocean ecosystem. The environmental problems due to MP contamination is attracting worldwide attention. In this study, the survey was conducted to clarify the origin of MP obtained on various beaches of Sagami Bay from the viewpoint of chemical adsorption. There was no clear difference in the amount of Perfluorinated Compounds (PFCs) adsorbed on various MP materials. PS foam with a large surface area adsorbed more PFCs per unit weight than resin. The amount of PFOS adsorbed on the MP collected on Kugenuma beach downstream Hikiji river, where PFOS concentration in the water sample was relatively high, was higher than that adsorbed on the MP collected from the other two beaches. The total rainfall for one month before sampling in autumn was higher than the annual average, and the amount of PFCs adsorbed on the MP in autumn was lower than that in other seasons. The amount of PFOS adsorbed on the MP was high in the river downstream from the middle of the Hikiji River. Partition coefficient (Kd) of PFOS that obtained from the elution test used the collected MP was higher than the valve by adsorption test for unused MP. Apparent Kd of PFOS by the MP on Kugenuma beach and the river water at Hujimi bridge of Hikiji river was the same order as the valve that obtained from the elution test used the collected MP. It has been clarified that the MP fragments flowed into the Hikiji river were adsorbed with PFOS and flowed down, and they were drifted to the Kugenuma beach.
{"title":"Perfluoroalkyl Compounds on the Microplastics Found in Sagami Bay and Effect of the Inflow Rivers","authors":"S. Mishima, K. Ozawa, S. Nakayama, Hiromi Kikuchi","doi":"10.5985/jec.30.66","DOIUrl":"https://doi.org/10.5985/jec.30.66","url":null,"abstract":"Microplastics (MP) can cause damage to ocean ecosystem. The environmental problems due to MP contamination is attracting worldwide attention. In this study, the survey was conducted to clarify the origin of MP obtained on various beaches of Sagami Bay from the viewpoint of chemical adsorption. There was no clear difference in the amount of Perfluorinated Compounds (PFCs) adsorbed on various MP materials. PS foam with a large surface area adsorbed more PFCs per unit weight than resin. The amount of PFOS adsorbed on the MP collected on Kugenuma beach downstream Hikiji river, where PFOS concentration in the water sample was relatively high, was higher than that adsorbed on the MP collected from the other two beaches. The total rainfall for one month before sampling in autumn was higher than the annual average, and the amount of PFCs adsorbed on the MP in autumn was lower than that in other seasons. The amount of PFOS adsorbed on the MP was high in the river downstream from the middle of the Hikiji River. Partition coefficient (Kd) of PFOS that obtained from the elution test used the collected MP was higher than the valve by adsorption test for unused MP. Apparent Kd of PFOS by the MP on Kugenuma beach and the river water at Hujimi bridge of Hikiji river was the same order as the valve that obtained from the elution test used the collected MP. It has been clarified that the MP fragments flowed into the Hikiji river were adsorbed with PFOS and flowed down, and they were drifted to the Kugenuma beach.","PeriodicalId":15764,"journal":{"name":"Journal of environmental analytical chemistry","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84314534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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