Industrial laboratory. Diagnostics of materials最新文献_第3页

GC-MS determination of polychlorinated biphenyls in water using extractive freezing-out of analytes 利用萃取冷冻分析物的气相色谱-质谱法测定水中的多氯联苯

Industrial laboratory. Diagnostics of materials Pub Date : 2024-05-23 DOI: 10.26896/1028-6861-2024-90-5-20-26

T. Chervonnaya, T. N. Musorina, Z. Temerdashev, V. N. Bekhterev, I. Korpakova

{"title":"GC-MS determination of polychlorinated biphenyls in water using extractive freezing-out of analytes","authors":"T. Chervonnaya, T. N. Musorina, Z. Temerdashev, V. N. Bekhterev, I. Korpakova","doi":"10.26896/1028-6861-2024-90-5-20-26","DOIUrl":"https://doi.org/10.26896/1028-6861-2024-90-5-20-26","url":null,"abstract":"A method for determining polychlorinated biphenyls (PCBs) in water using the method of concentrating analytes through extractive freezing-out under the effect of a centrifugal forces (EFC) has been developed. A mathematical model for analyte extraction using a three-factor Box-Behnken design demonstrated that the content of acetonitrile in the extraction mixture is a significant factor, whereas the degree of PCBs chlorination and the concentration of analytes are insignificant parameters. Analysis of the surface area of the model allowed the determination of the optimal range of the acetonitrile concentration, which fell between 14 and 21%. A 15% content of acetonitrile in the extraction mixture provided maximum extraction efficiency for 7 different PCBs (>92%) across a wide range of analyte concentrations (1.0 – 5000 ng/liter). The relative standard deviations in the repeatability and reproducibility range from 4.2 to 6.8% and 5.3 to 8.1%, respectively, the accuracy of analyte determination being 10 – 15%. Petroleum hydrocarbons were not extracted into the acetonitrile extract and did not interfere with the determination of PCBs, which provided longer operation of the detector without any loss in the sensitivity. Co-extraction of polycyclic aromatic hydrocarbons and chlorinated pesticides did not affect the extraction of PCBs from water (95 – 100%) and did not touch on the metrological indicators of the determination procedure.","PeriodicalId":13559,"journal":{"name":"Industrial laboratory. Diagnostics of materials","volume":"22 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141105705","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 technique for depositing iron, tungsten, molybdenum, and chrome in the determination of selenium and tellurium in alloy steel by ICP-AES method 用 ICP-AES 法测定合金钢中的硒和碲时沉积铁、钨、钼和铬的技术

Industrial laboratory. Diagnostics of materials Pub Date : 2024-05-22 DOI: 10.26896/1028-6861-2024-90-5-5-11

A. Belozerova, A. Mayorova, M. N. Bardina

{"title":"A technique for depositing iron, tungsten, molybdenum, and chrome in the determination of selenium and tellurium in alloy steel by ICP-AES method","authors":"A. Belozerova, A. Mayorova, M. N. Bardina","doi":"10.26896/1028-6861-2024-90-5-5-11","DOIUrl":"https://doi.org/10.26896/1028-6861-2024-90-5-5-11","url":null,"abstract":"Direct determination of the content of selenium and tellurium impurities in metallurgical materials by the method of inductively coupled plasma atomic emission spectroscopy (ICP-AES) is difficult due to spectral and non-spectral interference from macrocomponents present in the materials under study. The separation of micro-(Se, Te) and macro-components (Fe, W, Mo, Cr, Cu, Ni, Co) through preliminary precipitation is the goal of the study. The use of barium acetate and sodium fluoride as precipitants are shown to provide an effective separation of Se and Te from Fe, W, Mo, and Cr (the content in the analyzed solution is less than 0.1 wt.% of the original) and partial separation from Cu, Ni, and Co (the content in the analyzed solution from 25 to 55 wt.% of the original). Optimal conditions for the deposition of macrocomponents (Fe, W, Mo, Cr) and inhibition of the process of coprecipitation of selenium and tellurium on sediments of macrocomponents for their subsequent ICP-AES determination were determined. The optimal pH for the precipitation of macrocomponents equals 1. The optimal mass of precipitants (barium acetate and sodium fluoride) is 10 and 3 g, respectively. To inhibit the process of coprecipitation of selenium and tellurium on sediments of macrocomponents, it is proposed to use hydrofluoric acid. The optimal volume of hydrofluoric and hydrochloric acids for inhibiting the process of coprecipitation of analytes on sediments of macrocomponents was determined (3 and 6 cm3, respectively). The developed procedure for separating micro-Se, Te from macro-components was tested on standard samples of alloyed steels using the «spike» method. The technique is characterized by satisfactory accuracy and reproducibility, the limit of determination of analytes after separation of macrocomponents is 10–3 wt.%.","PeriodicalId":13559,"journal":{"name":"Industrial laboratory. Diagnostics of materials","volume":"53 26","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141108535","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

X-Ray fluorescence analysis of paraniobate based ceramics of composition Y3–xYbxNbO7 成分为 Y3-xYbxNbO7 的对二铌酸盐基陶瓷的 X 射线荧光分析

Industrial laboratory. Diagnostics of materials Pub Date : 2024-05-22 DOI: 10.26896/1028-6861-2024-90-5-12-19

A. A. Arkhipenko, G. E. Marina, V. B. Baranovskaia, M. A. Ryumin

{"title":"X-Ray fluorescence analysis of paraniobate based ceramics of composition Y3–xYbxNbO7","authors":"A. A. Arkhipenko, G. E. Marina, V. B. Baranovskaia, M. A. Ryumin","doi":"10.26896/1028-6861-2024-90-5-12-19","DOIUrl":"https://doi.org/10.26896/1028-6861-2024-90-5-12-19","url":null,"abstract":"A two-stage technique for X-ray fluorescence analysis of ceramic samples of composition Y3–xYbxNbO7 (where x = 0 – 3) has been developed. At the first stage, using the method of fundamental parameters (FPM), a rapid semi-quantitative analysis of ceramic samples and products of intermediate synthesis was carried out to determine their preliminary composition. At the second stage, the quantitative composition of the samples was determined using the constructed calibration dependencies. To construct calibration dependencies a series of reference samples containing 3.16 – 56.55% Y, 8.78 – 71.0% Yb, and 12.83 – 19.70% Nb was synthesized using a method similar to that used for preparation of the ceramic samples under study. Analytical lines of elements free from spectral overlaps and XRF conditions (current and voltage of an X-ray tube, exposure time, method of taking into account the background near the analytical line) were selected. The relative standard deviation of the results of Y, Yb, and Nb determination in ceramic samples did not exceed 0.66%, the relative error was no more than 1.63%. The results obtained were compared with the calculated content of analytes in the samples of stoichiometric composition and with the results of ICP-AES analysis of real ceramic samples. The developed technique provides determination of the main components of ceramic samples and can be used for analytical control of synthesis of rare earth paraniobates.","PeriodicalId":13559,"journal":{"name":"Industrial laboratory. Diagnostics of materials","volume":"13 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141111622","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

Application of the magnetic method to control the deformed state of ER308LSI steel samples obtained by additive growing 应用磁性方法控制添加剂生长法获得的 ER308LSI 钢样品的变形状态

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-22 DOI: 10.26896/1028-6861-2024-90-4-66-74

A. A. Khlybov, D. Ryabov, A. A. Solovyov

引用次数: 0

Method for extending the frequency range of sound generators for strength acoustic tests 扩大强度声学测试用发声器频率范围的方法

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-22 DOI: 10.26896/1028-6861-2024-90-4-75-82

A. Sterlin, E. A. Surkov, I. S. Ivanushkin

引用次数: 0

Study of the mechanical properties and the microstructure of welded joints made of structural high-strength steels S690QL of Russian and foreign origin 俄罗斯和外国高强度结构钢 S690QL 焊接接头的机械性能和微观结构研究

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-21 DOI: 10.26896/1028-6861-2024-90-4-40-45

A. A. Galkin, Yu.S. Mordovina, M. Anosov, D. Shatagin

引用次数: 0

Research of precipitations in assessing the causes of corrosion at gas facilities 在评估天然气设施腐蚀原因时对沉淀物进行研究

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-21 DOI: 10.26896/1028-6861-2024-90-4-31-39

R. K. Vagapov, O. G. Mikhalkina

引用次数: 0

Root cause analysis of the brittle fracture of pipes of boiler heating surfaces after long-term operation 锅炉受热面管道长期运行后脆性断裂的根本原因分析

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-21 DOI: 10.26896/1028-6861-2024-90-4-53-65

A. V. Nechaeva, V. Polyanskiy, A. Polyanskiy, V. V. Shalagaev, Yu. A. Yakovlev

引用次数: 0

High-voltage power supply for x-ray control of the structure of materials 用于 X 射线控制材料结构的高压电源

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-21 DOI: 10.26896/1028-6861-2024-90-4-46-52

A. S. Dmitriev, A. D. Kuleshov, N. N. Potrakhov, Y. Potrakhov, K. K. Guk

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The effect of magnetic nanoparticles and cetylpyridinium chloride on the electroanalytical properties of planar sensors sensitive to cefuroxime and cefotaxime 磁性纳米颗粒和氯化十六烷基吡啶鎓对头孢呋辛和头孢他啶敏感平面传感器电分析特性的影响

Industrial laboratory. Diagnostics of materials Pub Date : 2024-04-20 DOI: 10.26896/1028-6861-2024-90-4-5-11

E. G. Kulapina, R. K. Mursalov, O. I. Kulapina

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