Estimate of Precision of Thermogravimetric Method of Measuring Moisture Content: Estimate of Precision and Effectiveness Gained with the Use of the Method in the Agro-Industrial Complex

Author(s):  
P. I. Kalandarov
Metrologiya ◽  
2021 ◽  
pp. 44-62
Author(s):  
P. V. Kalandarov

The problem of limited practical application of methods and devices for automatic control of the moisture content of products of the agro-industrial complex has been studied. Determination of moisture content of products of the agro-industrial complex by thermogravimetric method is considered. The efficiency of weighing and sampling by accelerated and arbitration methods is analyzed. The errors in determining the moisture content of products by the thermogravimetric method are estimated. It was found that the error of the accelerated method is several times higher than the error of the arbitration method. The need to improve the existing thermogravimetric method for determining moisture content, both in terms of rapidity and accuracy, is noted. The importance of choosing the optimal number of determined parameters of the research object, which ensures the maximum measurement accuracy, is shown. Based on the analysis and assessment of the accuracy of the thermogravimetric method for measuring humidity, the main requirements for the design of humidity control devices are formulated.


2021 ◽  
Vol 7 (1) ◽  
pp. 39-49
Author(s):  
Hary Kurniawan ◽  
Sukmawaty Sukmawaty ◽  
Ansar Ansar ◽  
Kurniawan Yuniarto ◽  
Murad Murad ◽  
...  

This study aims to determine the drying rate constant of coconut chips using an oven. Coconut chips drying is carried out at drying temperatures of 50 ° C, 60 ° C and 70 ° C. Drying coconut chips has been conducted at an initial water content of 40-50% wb until it reached ± 10% wb. The change of moisture content was measured every 15 minutes, and the measurement of the water content was determined by the thermogravimetric method. Newton's model was used in determining the observation drying rate constant. Furthermore, the observation drying rate constant was applied to predict the drying rate constant as a function of temperature using the Arrhenius equation. The results showed that the predicted drying rate constants ranged from 0.0090 - 0.0130 minute-1. 


1968 ◽  
Vol 19 (03/04) ◽  
pp. 423-429 ◽  
Author(s):  
G. M Thelin ◽  

SummaryA stable, lyophilized AHF reference plasma has been prepared from pooled plasma from at least 50 normal healthy donors and standardized against a primary standard of fresh plasma from 20 healthy male donors aged 20 to 40. Average AHF potency of a typical lot is 98.8%, and moisture content is less than 0.5%. Under storage at -25° C, this AHF reference plasma is stable for at least 18 months. It has been used in several major coagulation laboratories, and has given consistently satisfactory and reproducible results in AHF assays.


2019 ◽  
pp. 74-89
Author(s):  
Boris A. Kheyfets ◽  
Veronica Yu. Chernova

The paper analyzes the possibilities of improving the Russian policy of import substitution using the potential of the EAEU. A concrete analysis was carried out for the branches of the agro-industrial complex, where the greatest success was achieved in import substitution. There is a need for smart selective import substitution, the most important direction of which is the export-oriented one. This will improve the competitiveness of Russia and the EAEU as a whole in the global economy and will also promote the deepening of mutual ties of the EAEU countries. The main ways of solving this problem are shown.


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