Аналитика и контроль最新文献_第2页

Flow methods as a general approach to automation of the chemical analysis of aqueous media (review) 流动法作为水介质化学分析自动化的一般方法(综述)

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.001

L. N. Moskvin, N. M. Yakimova, A. L. Moskvin

{"title":"Flow methods as a general approach to automation of the chemical analysis of aqueous media (review)","authors":"L. N. Moskvin, N. M. Yakimova, A. L. Moskvin","doi":"10.15826/analitika.2023.27.1.001","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.1.001","url":null,"abstract":"The article is devoted to the consideration of general approaches to automating the analysis of aqueous media, which are the main objects of chemical analysis including natural and waste waters, as well as technological media in various industries (microelectronics, biochemical industries, nuclear and thermal power engineering), which are the main consumers of high-purity water used for pre-start flushing of inline equipment to the required cleanliness of surfaces, for preparation of coolants that ensure the operation of nuclear and thermal power plants. In all these cases, the content of impurities in used or spent and intended for discharge aqueous media is strictly regulated. Changes in the content of impurities in controlled media often occur spontaneously due to equipment failure on the controlled objects. Prompt response to such changes and their timely elimination can be performed more efficiently if chemical and technological control of the normalized parameters of aqueous media of any named origin and destination is carried out in a continuous automatic, on-line, mode, which guarantees the exclusion of gaps or delays in obtaining information about equipment failure on a controlled facility in case of technological control or about unauthorized discharges of pollutants in case of environmental control. Possible methodological approaches to the development of systems for continuous chemical monitoring of quality or levels of contamination of aqueous media are considered on the basis of the above prerequisites, and applicability of various flow methods for these purposes is discussed in the order of their appearance in the arsenal of analytical chemists.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135211073","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

Comments on the article by I.G. Zenkevich «Calculation of average chronological values – an undeservedly neglected method of statistical data processing» 对I.G. Zenkevich文章的评论«计算平均时间顺序值-统计数据处理的不应被忽视的方法»

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.006

A. L. Pomerantsev

引用次数: 0

Supplement to A.L. Pomerantsev's comments on I.G. Zenkevich's article «Calculation of average chronological values – an undeservedly neglected method of statistical data processing» 补充A.L. Pomerantsev对I.G. Zenkevich的文章“计算平均年代值-统计数据处理中不应被忽视的方法”的评论

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.007

Igor G. Zenkevich

引用次数: 0

Calculation of average chronological values – an undeservedly neglected method of statistical data processing 按时间顺序计算平均值——一种不应被忽视的统计数据处理方法

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.005

Igor G. Zenkevich

{"title":"Calculation of average chronological values – an undeservedly neglected method of statistical data processing","authors":"Igor G. Zenkevich","doi":"10.15826/analitika.2023.27.1.005","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.1.005","url":null,"abstract":"In real analytical practice involving parallel determinations there are certain objective reasons (limited measurement time, available resources, etc.) that prevent performing sufficient number of measurements required for rigorous statistical data processing. Such parameters as standard deviations are particularly unreliable for small data sets (they are usually too high in comparison with the results obtained for more representative data sets). This problem can be minimized by changing the character of data processing, i.e. calculating so-called chronological averages instead of average arithmetical values. This, however, requires ranking the data not in the order as they were measured, but in the ascending order. The essence of calculating chronological averages is that the minimum and the maximum values of the initial data set are replaced with a single number, namely their arithmetical average, which is then averaged with other data. As a result, the total number of data values decreases by one but the changes of the averages would be negligible. At the same time, the standard deviations of the modified data sets become more characteristic and approaching the standard deviations of extended data sets. Replacing the arithmetical means by chronological average values leads to sufficiently smaller distortions of the initial data sets than, for example, in the case of excluding outliers by using the well-known “3s” criterion.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"55 17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134979838","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 iron (III) in environmental objects by photometric method with acetylacetone derivatives 乙酰丙酮衍生物光度法测定环境物体中的铁(III)

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.2.003

Kh. D. Nagiyev, A. U. Abiyeva, F. M. Chiragov, U. A. Gullarli

{"title":"Determination of iron (III) in environmental objects by photometric method with acetylacetone derivatives","authors":"Kh. D. Nagiyev, A. U. Abiyeva, F. M. Chiragov, U. A. Gullarli","doi":"10.15826/analitika.2023.27.2.003","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.2.003","url":null,"abstract":"Organic reagents containing three carbonyl groups based on acetylacetone, 2,4-diacetyl-3-phenyl-5-methyl-5-hydroxyhexanone (R1), 2,4-diacetyl-3-(3'-nitrophenyl)-5-hydroxy-5-methylcyclohexanone (R2) and 3-acetyl-4,6-diphenylgensandione-2,6 (R3), were synthesized. Their absorption spectra were studied at various pH values of the medium, and the acidity constants were determined by potentiometric titration. It was found that the reagents are monobasic acids and, depending on the acidity of the medium, can be in the molecular (HR) or anionic (R-) form. Formation of iron (III) complexes with synthesized reagents in the presence of hydrophobic amines, 1,10-phenanthroline (Phen), diantipyrylmethane (DAM) and diantipyrylphenylmethane (DAPM) was studied. It was established that mixed ligand complexes with the components ratio of 1:1:1 were formed in the presence of hydrophobic amines. At the same time bathochromic shifts in the absorption spectra were observed and the maximum yield was noted in a more acidic medium compared to the corresponding single ligand complexes. The influence of the reagents concentration, time and temperature on the formation of mixed ligand complexes was studied, and the stability constants were determined by various methods. It was shown that iron (III) in the form of mixed ligand complexes, Fe(III)-R1-DAM, Fe(III)-R2-Phen and Fe(III)-R3-DAM, can be determined with high selectivity in the presence of large excess of other metal cations. The developed methods were tested on fruits – strawberries, apricots, cherries, white cherries and two varieties of apples (Golden Ahmadi and Simirenko), and natural waters – drinking water taken from a tap in the BSU laboratory and Caspian Sea water taken near the Turkan village of Baku city.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134980028","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

Novel approaches to the formation of coatings based on gold nanoparticles and albumin for chiral separation in capillary electrophoresis 基于金纳米颗粒和白蛋白的毛细管电泳手性分离涂层的新方法

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.002

V. P. Morgacheva, D. V. Makeeva, E. V. Solovyeva, E. A. Kolobova, L. A. Kartsova

{"title":"Novel approaches to the formation of coatings based on gold nanoparticles and albumin for chiral separation in capillary electrophoresis","authors":"V. P. Morgacheva, D. V. Makeeva, E. V. Solovyeva, E. A. Kolobova, L. A. Kartsova","doi":"10.15826/analitika.2023.27.1.002","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.1.002","url":null,"abstract":"Combination of properties of gold nanoparticles and bovine serum albumin is promising for the formation of chiral stationary phases enabling high enantioselectivity due to developed surface of coatings and increased chiral selector concentration on the capillary walls. In this work we proposed and compared two approaches to the formation of physically adsorbed multilayer coatings based on citrate-stabilized gold nanoparticles (cGNP) and bovine serum albumin (BSA) for the chiral separation in capillary electrophoresis. In the first approach pre-synthesized cGNP modified with BSA were immobilized on the capillary coated by poly(diallyldimethylammonium chloride) (PDADMAC). PDADMAC polymer was used as a binding layer promoting sorption of the nanoparticles on the capillary surface. It was shown that cGNP-BSA was poorly adsorbed on the capillary surface due to low zeta potential and could not be used for the formation of dense coatings. The second approach included sequential layer-by-layer deposition of PDAMAC and cGNP, resulting in the formation of a dense layer of nanoparticles. The main stage included in-capillary functionalization of cGNP with BSA. Scanning electron microscopy confirmed that the layer-by-layer deposition of modifiers ensured the formation of dense layer of nanoparticles on the capillary surface. The coating was stable in the entire range of pH studied (2–10). The application of such coating allowed reduction of BSA concentration (to 5 μM) in the background electrolyte required for the tryptophan enantiomers separation. It confirms the prospectiveness of combining nanoparticles and chiral selectors for the increase of specific surface area of the capillary inner walls.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"133 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134980448","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 study of silver sorption from aqueous solutions by solid-phase modified poly(n-thiocarbamoyl-3-aminopropyl silsesquioxane) 固相改性聚(n-硫代氨基甲酰基-3-氨基丙基硅氧烷)吸附水溶液中银的研究

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.004

E.A. Melnik, A. A. Sysolyatina, Yu. S. Petrova, A. S. Kholmogorova, L. К. Neudachina, V. A. Osipova, A. V. Pestov

{"title":"A study of silver sorption from aqueous solutions by solid-phase modified poly(n-thiocarbamoyl-3-aminopropyl silsesquioxane)","authors":"E.A. Melnik, A. A. Sysolyatina, Yu. S. Petrova, A. S. Kholmogorova, L. К. Neudachina, V. A. Osipova, A. V. Pestov","doi":"10.15826/analitika.2023.27.1.004","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.1.004","url":null,"abstract":"Sorption properties of poly(3-aminopropylsilsesquioxanes) modified with thiourea groups were studied to predict the possibility of using poly(n-thiocarbamoyl-3-aminopropylsilsesquioxanes) (TCPS) in separation and concentration techniques. The sorbents were synthesized by the sol-gel method followed by solid-phase modification using ammonium thiocyanate or thiosemicarbazide as modifiers. It was established that sorbents with the highest content of thiocarbamide functional groups (modified with ammonium thiocyanate) enabled quantitative and selective recovery of Ag (I) from strongly acidic solutions. The degree of Ag (I) recovery slightly decreases at pH>5, which is associated with increasing competitive sorption of Cu (II), Ca (II), Mg (II), Mn (II) and Fe (III). The highest recovery of Ag (I) for TCPS-0.63 and TCPS-0.68 was achieved at pH ranging from 4 to 8 (degree of recovery was 55–68% (TCPS-0.63); 21–26% (TCPS-0.68 )); at the same time, there was a predominance of competitive sorption of Ca (II), Mg (II), Mn (II), and Fe (III). Based on the aforementioned, it can be concluded that the sorbents modified with ammonium thiocyanate are characterized by high concentration of attached thiocarbamide groups that make them suitable for the selective recovery of Ag (I) ions from multicomponent solutions at pH 1–2.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134980824","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

PHOTOMETRIC DETERMINATION OF ERYTHROSIN IN THE PRESENCE OF SYNTHETIC ACIDIC DYES IN FOOD PRODUCTS 食品中合成酸性染料中红血素的光度测定

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.2.004

Y. М. Pliashak, S. M. Leschev, A. I. Palianskikh, L. L. Belysheva

{"title":"PHOTOMETRIC DETERMINATION OF ERYTHROSIN IN THE PRESENCE OF SYNTHETIC ACIDIC DYES IN FOOD PRODUCTS","authors":"Y. М. Pliashak, S. M. Leschev, A. I. Palianskikh, L. L. Belysheva","doi":"10.15826/analitika.2023.27.2.004","DOIUrl":"https://doi.org/10.15826/analitika.2023.27.2.004","url":null,"abstract":"In Republic of Belarus and the countries of the EACU, the synthetic dye E 127 (erythrosine) is prohibited for the use in the production of food products. To control the content of this additive, accurate and rapid methods of determination are required. In order to develop a methodology for determination of erythrosin in the presence of food synthetic dyes (E 102, E 104, E 110, E 122, E 123, E 124, E 128, E 129, E 131, E 132, E 133, E 142, E 143 , E 151, E 155) the extraction of dyes with organic solvents from aqueous solutions was studied and their distribution coefficients were determined. Based on the data obtained in the presence of the above dyes, a method for determining E 127 without the use of expensive chromatographic equipment was proposed. The technique is based on sample preparation, which consists of the selective extraction of E 127 from an aqueous solution of the food matrix (pH=2) using chloroform. Other synthetic dyes were not extracted. Next, the extract was evaporated, dissolved in a buffer solution at pH=9 and photometrically measured at the wavelength of 527 nm. In the presence of hydrophobic organic dyes (carotene, lycopene) in the food matrix, their preliminary extraction was carried out from the aqueous solution at pH=9 with chloroform; under these conditions all dyes, including E 127, were not extracted. The limit of quantitative determination by the proposed method for liquid food products was 0.05 mg/kg, for solid – 0.13 mg/kg, the standard deviation was 2–3 %.","PeriodicalId":24041,"journal":{"name":"Аналитика и контроль","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135211079","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

XXXII Annual Meeting of the Analytical Centers Association "Analitica" 第三十二届分析中心协会年会

Аналитика и контроль Pub Date : 2023-01-01 DOI: 10.15826/analitika.2023.27.1.008

V. V. Stepanovskikh

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