scholarly journals Cement Quality Control By Using Modern Radiation Methods Of Chemical Analysis In The Process Of Its Production

2019 ◽  
Vol Vol. 14, No.1 ◽  
pp. 15-20
Author(s):  
Yu. Kuchirka ◽  
E. Volodarsky ◽  
Keyword(s):  
Quality Control ◽  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Chemical Analysis ◽  
Neutron Activation ◽  
Quality Management System ◽  
Raw Materials ◽  
Spectral Characteristics ◽  
Cement Production ◽  
X Ray

An essential part of modern quality management system in cement production is state-of-the-art radiation measurement technologies based on methods of neutron activation, X-ray fluorescence and X-ray diffraction chemical analysis of substance. The high speed and accuracy of measuring the characteristics of raw materials and finished products can be achieved by their complex application, thereby ensuring an improving in the level of automation of cement production and the quality of cement in general. The main stages of the portlandcement production process by dry method are considered, including the keypoints of quality control of their implementation by applying mentioned radiation methods of chemical analysis of raw materials and completed product. The metrological problems of their practical implementation in continuous cement production are analyzed, in particular problems of uncertainty assessment, static and dynamic calibration and increase of accuracy of measuring systems that implement neutron activation analysis methods. Shown the directions of their improvement by the use of alternative neutron sources, methods of Monte Carlo N-Particle Transport Code for neutron activation analysis physical processes simulation and machine learning for the efficient processing of spectral characteristics of investigated substances.

A Review of Bromine Determination in Foods

1975 ◽  
Vol 58 (4) ◽  
pp. 711-716 ◽  
Author(s):  
Milton E Getzendaner
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Organic Compounds ◽  
Methyl Bromide ◽  
Ethylene Dibromide ◽  
X Ray ◽  
Instrumental Methods ◽  
Bromine Determination

Abstract Organic compounds containing bromine, including methyl bromide, ethylene dibromide, and l,2-dibromo-3-chloropropane, have been used extensively for the fumigation of foods, or soils in which foods grow, making it necessary to determine residues of bromine and bromine-containing organic compounds. A large number of methods for the determination of bromine in foods, as organic, inorganic, and combined total bromide, have been developed. In methods for organic bromide, the bromine is converted to the inorganic form for measurement by titration, photometry, or other means. In recent years, instrumental methods have been developed in which the total bromine in the sample is determined, regardless of the state in which it exists. X-ray fluorescence and neutron activation analysis are the 2 instrumental methods used most widely. Residue data are presented for some typical bromine-containing samples.

SMALL-SCALE HOUSEHOLD CERAMIC PRODUCTION: NEUTRON ACTIVATION ANALYSIS OF PLAIN AND DECORATED CERAMICS FROM PRE-AZTEC XALTOCAN, MEXICO

2020 ◽  
pp. 1-19
Author(s):  
Kristin De Lucia ◽  
Matthew T. Boulanger ◽  
Michael D. Glascock
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Raw Materials ◽  
Ceramic Production ◽  
Small Scale ◽  
Economic Systems ◽  
Early Postclassic ◽  
Ceramic Manufacture ◽  
Social Units

Abstract This study examines small-scale household ceramic production at the site of Xaltocan, Mexico, to understand the organization of household ceramic production prior to the development of the Aztec Empire. We examine utilitarian vessels and serving wares from an Early Postclassic (a.d. 900–1200) domestic context using neutron activation analysis (NAA). We also examine archaeological evidence for ceramic manufacture. The NAA data reveal that similar raw materials and paste recipes were used for both utilitarian and decorated wares, suggesting that households produced both plain and decorated pottery. We conclude that ceramic production was an intermittent activity that took place alongside other crafts and agriculture. By looking at ceramics within their contexts of use and production, we consider the practices and choices made by individual social units, which is crucial to interpreting broader Early Postclassic economic systems and the ways in which commoners influenced these systems.

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