Moisture holding capacity, determination

Suspension Polymers. Methacrylate suspension polymers are characterized by thek composition and particle-size distribution. Screen analysis is the most common method for determining particle size. Melt-flow characteristics under various conditions of heat and pressure are important for polymers intended for extmsion or injection molding appHcations. Suspension polymers prepared as ion-exchange resins are characterized by thek ion-exchange capacity, density (apparent and wet), solvent sweUing, moisture holding capacity, porosity, and salt-spHtting characteristics (105). 

Moisture Holding Capacity. The bed or equihbrium moisture is the amount of moisture retained after equihbration at 96—97% rh at 30°C (D1412) (18). Total moisture is determined by air drying, cmshing to smaller particle sizes and heating at 107°C to constant weight (D3302). 

Total moisture of coal Ultimate analysis of coal Ultimate analysis of coke Chlorine in coal and coke Phosphorus in coal and coke Arsenic in coal and coke Analysis of coal ash and coke ash Determination of moisture-holding capacity of hard coal General introduction and methods for reporting results Determination of total moisture of coke Proximate analysis, determination of moisture content of the general analysis test sample... 

ISO 1018. Determination of the Moisture Holding Capacity of Hard Coal. 

HilgarcTs technique (1906) for the determination of moisture-holding capacity is as follows A layer of soil 1 cm thick is placed in a screen-bottom cup and saturated with water by capillarity. The sample is then drained by placing it in a saturated atmosphere for 24 hrs, after which the moisture is determined in the usual way. 

British Standard BS 1016 Part 21 1981, Analysis and testing of coal and coke. Determination of moisture-holding capacity of coal. 

Feustel and Byers determined the moisture-holding capacities and wilting percentages of three peats and two soils, and of mixtures of these. A portion of these data is shown in Table 30.1. From these data the available moisture has been calculated and expressed as percentage of the moisture-holding capacities of the various materials and mixtures. 

ISO. 201 Ir. Hard Coal—Determination of Moisture-Holding Capacity (ISO 1018). International Standards Organization, Geneva, Switzerland. 

Water holding capacity (WHC) of texturized products was determined by a relatively fast, easy and repeatable method. Extrudates were first dried to 5 to 7% moisture content, and reduced to 4-6 mesh size particles. To 5 grams of extrudate,... 

Once the soil has been sieved, as much plant and animal residues must be removed as possible. This is best done with a pair of forceps, one small portion of soil at a time. The bulk soil should be covered to prevent any further drying. When the soil has been picked over, subsamples can be taken for determination of moisture content and water-holding capacity (WHC see following section) the soil should be stored at 4°C until use. It is advisable to use the soil as quickly as possible, and if storage is unavoidable, it should not normally exceed 3 months. 

The physical properties of soils important in corrosion are mainly those that determine the permeability of the soil to oxygen or air and to water. The particle size distribution of the soil is an important factor with respect to aeration and moisture content. In coarse texture soils such as sands and gravel, where there is free circulation of air, corrosion approaches the atmospheric type. Clay and silty soils are characterized in general by fine texture, high water-holding capacity, and by poor aeration and poor drainage. Variations in these characteristics within the same soil environment lead to higher corrosion rates comptired to that experienced by atmospherically exposed materials. 

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