HG 2958.10-1988 Determination of adsorbed water content in celestite ore by gravimetric method

HG 2958.10-1988 Determination of adsorbed water content in celestite ore Gravimetric method HG2958.10-1988 standard download decompression password: www.bzxz.net

National Standard of the People's Republic of China
Determinatlon of hygroscopicCclestite ores-Gravimetric method
-Determinatlon of hygroscopicCclestite ores-
maisture contcnt-Gravimetric method Subject content and scope of application
This standard specifies the determination of adsorbed water content in hygroscopicCclestite ores by the mass method. Basic standard Applicable to the determination of adsorbed water content in hygroscopicCclestite ore products. 2 Method Summary
UDC549.761.3
:543-06
GE 9018. 10 88
-258.10-1188
Weigh 1000g of sample with a particle size of less than 5mm, dry it at 105~110℃, and calculate the adsorbed water content based on the weight loss. 3 Instruments and apparatus
3.1 Balance, weighing No. 2000, sensitivity 1g! 3.2 Oven: with temperature automatic controller;
3.3 Sample container: porcelain plate.
4 Sample
The sample passes through a 1.75mm sieve (GB6003-85). 5 Analysis steps
Weigh 1000ε sample (weighed to 2g) and spread it evenly on a porcelain plate of known mass (thickness should be less than 2cm), place it in an oven at 105-110℃ and dry it for 2h (after drying for 1h, stir it gently with a glass rod: times). Take it out and cool it down, then weigh it again, until the difference between the two weighings is no more than.
6 Calculation of analysis results
The percentage of adsorbed water (H,0) (X) is calculated as follows:,
Mass of sample and porcelain plate before drying, name;
Mass of sample and porcelain salt after drying, name
Mass of sample, name.
Approved by the Ministry of Chemical Industry of the People's Republic of China on March 21, 1988 m2x100
Implementation of 1988-1201
7 Allowable difference
GB9018.70—88www.bzxz.net
The difference of the results of determination in the same laboratory should be less than 0.5%, with the following explanation:
This standard is under the jurisdiction of the Chemical Industry and Mining Design Institute of the Ministry of Chemical Industry. This standard was drafted by the Chemical Industry and Mining Design Institute of the Ministry of Chemical Industry. The drafter of this standard is Lihua.
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