Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam最新文献_第9页

Development of method for determination and quantification of Alternaria mycotoxins in food by high resolution mass spectrometry 食品中真菌毒素高分辨质谱测定与定量方法的建立

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-28 DOI: 10.47866/2615-9252/vjfc.3884

Tu Vu Ngoc, Huong Hoang Lan, Tien Bui Cao, Son Tran Cao

{"title":"Development of method for determination and quantification of Alternaria mycotoxins in food by high resolution mass spectrometry","authors":"Tu Vu Ngoc, Huong Hoang Lan, Tien Bui Cao, Son Tran Cao","doi":"10.47866/2615-9252/vjfc.3884","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3884","url":null,"abstract":"High-resolution liquid chromatography-mass spectrometry (LC-HRMS) is a highly sensitive, specific and accurate method for the simultaneous detection and quantification of three mycotoxins Alternaria (Alternariol (AOH), Alternariol Monomethyl Ete) (AME), Tenuazonic acid (TeA)). Chromatographic conditions include: column reversed phase C18, mobile phases in gradient mode with two channels of H2O and MeOH containing 0.1 % formic acid and 10 mM ammonium formate. HRMS high resolution mass spectrometer detector with negative electron ionization (ESI-) source is used. Samples were cleaned and enriched using an Oasis HLB solid phase extraction column. The method has a limit of quantitation (LOQ) for AOH and AME of 1.0 µg/kg and TeA of 1.0 µg/kg with recovery from 80.0 to 114.8 %, repeatability from 0.07 - 9.9 %, meeting the requirements of AOAC and European regulations. The method was applied to detect and quantify Alternaria mycotoxins in 80 food samples collected in Hanoi city. AOH was detected in 04/20 vegetable samples (3.3 - 178 µg/kg), 03/20 fruit samples (5.6 - 7.3 µg/kg), 06/20 cereal samples (13.4 - 17.4 µg/kg), 03/20 oil seed samples (13.2 - 25.2 µg/kg); detected AME in 01/20 vegetable samples (7.5 µg/kg), 02/20 fruit samples (< 3 µg/kg), 01/20 cereal samples (9.5 µg/kg), 02/20 oil seed samples (< 3 µg/kg); detected TeA in 02/20 vegetable samples (9.0 µg/kg), 01/20 cereal samples (< 3 µg/kg), 02/20 oil seed samples (< 3 µg/kg), not detected in fruit samples.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"64 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88935872","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}

引用次数: 0

Simultaneous determination of four organic acids in beverages by capillary electrophoresis coupled with ultraviolet detector 毛细管电泳-紫外检测器同时测定饮料中4种有机酸

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-17 DOI: 10.47866/2615-9252/vjfc.3906

D. Bui Quang, Ivanova Arina, Qiu Siyuan, Lanekoff Ingela

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Determination of some Aristolochic acid and Aristolactam in herbal dietary supplements containing Aristolochiaceae plants 含马兜铃科植物的草药膳食补充剂中部分马兜铃酸和马兜铃内酰胺的测定

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-15 DOI: 10.47866/2615-9252/vjfc.3908

Minh Hoa Nguyen Thi, Hien Dang Thi, Hong Ngoc Nguyen Thi, Son Tran Cao, Thanh Hien Kim Thi, Thanh Ha Pham Thi

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Study on the Production of Reference Material of Heavy Metals (As, Cd, Pb, Hg) in Water 水中重金属(As、Cd、Pb、Hg)标准物质的制备研究

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-09 DOI: 10.47866/2615-9252/vjfc.3882

Phuong Thao Le Thi, Hang Nguyen Thi, Hong Ha Tran Thi, Chau Nguyen Minh

{"title":"Study on the Production of Reference Material of Heavy Metals (As, Cd, Pb, Hg) in Water","authors":"Phuong Thao Le Thi, Hang Nguyen Thi, Hong Ha Tran Thi, Chau Nguyen Minh","doi":"10.47866/2615-9252/vjfc.3882","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3882","url":null,"abstract":"Reference materials are an important tool in ensuring the validity of testing results. The use of standard materials in Vietnam is currently limited because the supply depends on foreign standard material manufacturers at a high cost, and there is no domestic manufacturer for water and food reference materials production. This study aims to provide a procedure reference materials production for heavy metals Pb, Cd, As, and Hg analysis in water. The reference materials were homogenized and stable for a period of 318 days from the date of manufacture. With the assigned values consistent with the concentration to be analyzed of the heavy metals in the normal water sample. The measurement uncertainty ranges from 7.0 to 21.7 %. These reference materials can be used for internal quality control for laboratories. The research provides a standard procedure for the following production times for reference materials for heavy metal analysis in water and also a premise for further research on standard samples with matrix and other analytical criteria.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87431832","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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Facility conditions, equipment, and materials to ensure food safety at food service establishments to prevent Covid-19 epidemic in Son La city in 2020 2020年，为预防新冠肺炎疫情，确保食品服务场所食品安全的设施条件、设备和材料

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-03 DOI: 10.47866/2615-9252/vjfc.3901

Thanh Nga Nguyen Thi, Hung Long Nguyen, Nhung Ninh Thi, Kieu Chinh Pham Thi

引用次数: 0

Knowledge and practice of food safety of establishment owners, food processors, and customers to prevent Covid-19 epidemic at food service businesses in Son La city in 2020 2020年，为了预防新冠肺炎疫情，在山萝市的食品服务企业中，经营者、食品加工企业和顾客的食品安全知识和实践

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-03 DOI: 10.47866/2615-9252/vjfc.3879

Thanh Nga Nguyen Thi, Long Nguyen Hung, Nhung Ninh Thi, Kieu Chinh Pham Thi

{"title":"Knowledge and practice of food safety of establishment owners, food processors, and customers to prevent Covid-19 epidemic at food service businesses in Son La city in 2020","authors":"Thanh Nga Nguyen Thi, Long Nguyen Hung, Nhung Ninh Thi, Kieu Chinh Pham Thi","doi":"10.47866/2615-9252/vjfc.3879","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3879","url":null,"abstract":"The current situation of the Covid-19 epidemic is still complicated, ensuring food safety for food service businesses is extremely necessary. Research and evaluate knowledge and practice on food safety of establishment owners, food processors and customers to prevent Covid-19 epidemic at food service establishments in Son La city in 2020 for found that the results were quite high: over 75 % of owners had knowledge of regulations to ensure food safety in the prevention of Covid-19 epidemic and 100 % were trained in disseminating and guiding epidemic prevention documents. Food processors who have knowledge and practice of regulations on ensuring food safety to prevent Covid-19 have reached a high rate of over 90 %, especially regulations of the Ministry of Health such as wearing masks when working, keep contact distance; wash hands, disinfect properly, and do not gather in large numbers in production facilities. 100 % of customers know about the 5K message. It is necessary to further strengthen the propaganda to ensure food safety to prevent Covid-19 epidemic so that the subjects can better understand the regulations of the Government, the Ministry of Health, departments and branches on ensuring food safety and prevention. Covid-19 and good practice of the above regulations.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"79 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88245716","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}

引用次数: 0

Pesticide residues on the agricultural products in Dong Thap province during 2016 - 2017 2016 - 2017年同塔省农产品农药残留分析

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-02 DOI: 10.47866/2615-9252/vjfc.3883

Cong Cuu Nguyen, T. Phan, Q. T. Le, Thanh Huong Le Thi, Tuyet Hanh Tran Thi, Toan Luu Quoc

引用次数: 0

Selection and identification of potential bacteria against postharvest fungal pathogens on strawberry fruit 草莓果实采后真菌病原菌的筛选与鉴定

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-03-01 DOI: 10.47866/2615-9252/vjfc.3881

Nuong Nguyen Kim, Ngoc Mai Dinh Thi, Hieu Vo Hoai, Huong Le Thi, Hue Pham Thi, Hanh Ninh Thi, Hoa Le Vinh, Q. Pham Van, H. Nguyen

{"title":"Selection and identification of potential bacteria against postharvest fungal pathogens on strawberry fruit","authors":"Nuong Nguyen Kim, Ngoc Mai Dinh Thi, Hieu Vo Hoai, Huong Le Thi, Hue Pham Thi, Hanh Ninh Thi, Hoa Le Vinh, Q. Pham Van, H. Nguyen","doi":"10.47866/2615-9252/vjfc.3881","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3881","url":null,"abstract":"Strawberries are economically important owing to their unique flavour, health benefits, and nutritional aspects. Decay after harvest is a major issue in the development of strawberry industry. Currently, the most effective method for controlling decay after harvest is storage of strawberries at low temperature combined with usage of chemical fungicides. However, long-term usage of chemical fungicides not only causes pathogen resistance but also is harmful for human health and environment. Biocontrol method for the management of disease after strawberry harvest has great practical significance. In this study, totally 200 bacterial strains isolated from the surface of healthy strawberry fruit were tested for antagonistic activity against five fungal pathogens. Among them, VK199 strain was potent against all five postharvest spoilage fungi on strawberry fruit and then utilized for further study. This strain was identified as Bacillus siamensis based on sequence analysis of 16S rDNA. The extracellular lytic enzymes, including cellulase, amylase, protease and chitinase released by B. siamensis VK199 were detected. Furthemore, in vivo, the results of biological control efficacy test showed that B. siamensis VK199 suppressed the occurrence of diseases caused by Botrytis cinerea, Colletotrichum gloeosporioides, Mucor nidicola and Rhizopus delemar of strawberry during storage.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"75 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72795471","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}

引用次数: 0

Determination of glucosamine in functional food samples by high performance liquid chromatography (HPLC-FLD) 高效液相色谱法测定功能性食品中的氨基葡萄糖

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2022-02-25 DOI: 10.47866/2615-9252/vjfc.3880

Mai Huong Pham Thi, My Hanh Truong Thi, Huyen My Dang Thi, Trang Vu Thi, Khanh Cao Cong, Anh Hoang Quoc, Ngoc Anh Mai Thi, Minh Thu Nguyen Thi, Quang Huy Nguyen, Anh Huong Nguyen Thi

{"title":"Determination of glucosamine in functional food samples by high performance liquid chromatography (HPLC-FLD)","authors":"Mai Huong Pham Thi, My Hanh Truong Thi, Huyen My Dang Thi, Trang Vu Thi, Khanh Cao Cong, Anh Hoang Quoc, Ngoc Anh Mai Thi, Minh Thu Nguyen Thi, Quang Huy Nguyen, Anh Huong Nguyen Thi","doi":"10.47866/2615-9252/vjfc.3880","DOIUrl":"https://doi.org/10.47866/2615-9252/vjfc.3880","url":null,"abstract":"A simple, rapid and specific method using high performance liquid chromatography with fluorescence detector (HPLC-FLD) was developed for quantification of glucosamine in supplements after derivatization with 9-fluorenylmethyl chloroformate (FMOC-Cl). The chromatographic separation was achieved on a C18 column (150 mm × 4.6 mm × 5 µm) using a gradient mobile phase containing acetonitrile and water at a flow rate of 1.0 mL/min. The FLD detector was operated at excitation and emission wavelengths of 265 and 315 nm, respectively. The analytical method was validated for specificity, linearity, accuracy, and precision. The detector response for glucosamine was linear over the selected concentration range from 6.7 to 135 ppm with a correlation coefficient of 0.9988. The repeatability (RSD, n = 6) and reproducibility (RSD, n = 4) were from 2.54 to 3.23 % and from 2.24 to 3.07 %, respectively. The recovery was between 98.0 and 101.5 %. In addition, we also joined the interlaboratory proficiency testing program (code: H21.11) organized by the National Institute of Food Control with good result (z-score value was - 0.89 < 2). The method was successfully applied for the analysis of glucosamine in 15 supplement samples.","PeriodicalId":12896,"journal":{"name":"Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam","volume":"45 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79337503","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}

引用次数: 0

A report on characterization of submerged fermentation of Phellinus linteus in Vietnam 越南茴香深层发酵特性的研究

Heavy metals and arsenic concentrations in water, agricultural soil, and rice in Ngan Son district, Bac Kan province, Vietnam Pub Date : 2021-12-23 DOI: 10.47866/2615-9252/vjfc.3849

D. Pham, Hang Nguyen Thi, Ly Nguyễn Thị, Minh Huyen Nguyen Thi

引用次数: 0