This standard is applicable to the determination of oxygen content in metallic vanadium. Determination range: 0.015～0.15%. This standard complies with GB 1467-78 "General Principles and General Provisions for Chemical Analysis Methods of Metallurgical Products". GB/T 8639.7-1988 Chemical Analysis Method for Vanadium - Determination of Oxygen Content by Pulse Fusion-Gas Chromatography GB/T8639.7-1988 Standard Download Decompression Password: www.bzxz.net

National preferential standard of the People's Republic of China
Chemical analysis method
Pulse melting-gas chromatography method for determining effective amount
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UDC 869.292
CR 8639.7-88
This standard uses the gold-wide disc ratio to determine the amount of bleaching, which must be determined, C.055~0.15 head. This standard is generally applicable to: 4R7-79 <metallurgical product chemical analysis method for the total energy of the trace leaching 31 method summary
the sample is heated in a dense electric culture in a stone weight-increasing exhaustion, and the blood is hardened and the oxygen and gas are calculated. The gas can be separated by a gas lock. The heat and the standard chemical process are determined by the electric test cell. The peak height of the peak is calculated in the form of emergency cooling. The peak content is calculated by the single peak.
2 reagent guide materials
2-1 blue mouse chemical.
22 explosive: oxygen content greater than 0.005: reduction environment is 1.1m, monthly de-gassed cotton station revolutionary clean surface, the most favorable mm×.4mm pin block, single wash, standby, 2.3 according to the state: sea stone ticket and vehicle fare map: current Whole, use the quotient to find the fraction, 2. Sub 13x3~0~3% Tonghua 1
Method: Method 1 also has many busy inside.
2.5 No water merchant fee.
2.5 Absorbent cotton,
2.7 Its supervisory responsibility.
2.104 Gas reduction 9.95
China Color Industry Wind Industry Corporation 1338.0711 Standard 3.51
1939.01-01 Issue
3 Instruments and equipment
3.1 Pulse heating-gas chromatography.
5.2 Gas reduction time
3.3 Decompression energy (with flow meter)
3.4 ​​Sample pressing die ring\)
5.5 Cooling water device:
GE 8639.7—86
2 Jade sample mold
4. The samples are used in turn for years (2. days), internal remuneration (2,9> to continue the room loss under the chain cleaning agent volatilization. 4:2 Use the sample pressing mold (3.4) to form the sample (41) into a cake with a mass of 0.2~-.48. 4.3 Weigh the sample (4.27. Standard pin 5.000285 Analysis steps
Check the operating procedures specified in the instrument manual, start, debug the instrument, and make the instrument in an effective state 5.1. 1
Bridge current: 120mA.
Air flow: ml/min.
Color: 2m or 1m long, with 13X molecular sieve (%.4, 5.1.3
Wet resistance: 5~.7: (select the best value of 2, bmIn) 5.1.5 tooth reduction, select according to the requirements bZxz.net
Minimum speed, mm/h
Science and technology air sieve speed: 0.5.~[.5m/minl The pressure of the gas delivered through the gland is approximately - small Flow rate of carrier gas H), 5.1.7
5.2 Fill water into the cold water assembly (S.5). The water condensation line is dry at room temperature, and the water supply and demand of each heating of the flushing furnace are stopped at 309 store after heating.
5.3 Change the flag flow to split the gas line, so that the flushing gas flow system pulse furnace, control the "lower telegraph", clean the dirt inside the life guard, install the new scale (2.3) and start the "lower electrode"
5. Heat at 44 for 60s. Then add 255 with 5A power, 6. ~R times (the blank value is not greater than 0.008m oxygen when this record 1. According to 5.3, update the furnace, install the new one, take out the details in 5.5, load the test tray (4.3), load it well, use 414 current to buy 60%, then use 66 people to add potential 25a to irradiate the gas twice, and recover after 0.5-~1min. You can choose an analysis gas circuit 5.6. The gas circuit is based on the original 5Bmn and records it automatically. Use the voltage opposite to the empty current 63A to control the heating degree (/), heat 215.
5.7 Start timing 4m from the last heating, that is, stop controlling the heating humidity, the temperature is 21%, and measure the peak height. When the empty value is not greater than ,g#, the analysis can be carried out.
5. Daily road samples (4.3) are put into the field with a fixed number of ~3 samples (2 in each garbage bin), and their height is measured according to the regulations of 5.7. 5.9 Determine the empty household according to 5.7.
5.70 Calculate the coefficient (K)
5.! 0.1 In a quality standard .02) get 2, you take a lot of 0 (2.1), and use the cadmium to save money. 5.10.2 Replace the tin box (2.2) into a block for determination. 5.10.3 Use tin trioxide (5.1n.1) and tin foil (5.1c.2) as the sample, and determine the oxygen peak height according to the analysis test method. Then calculate the calculation coefficient in 5.10. 5.10.4 Calculate the K value according to formula (1): -0.2070×m/mm, where: K-calculation coefficient, B/mm--proportional coefficient of the three-component chemical reaction! 27 0.--, chemical intelligence is GD 8639. 7-86. Analyze the three-component chemical reaction for temporary measurement of the oxygen peak height: when analyzing, the oxygen peak quotient is obtained, which can be m!
【—, the natural effect of pregnancy;
Determine the number of hours of trioxide (should be no less than four times). Note: The calculation coefficient can also be obtained by standard gas\, but the gas trace and the inlet position must be considered. The analysis result can be calculated by formula (2) to calculate the percentage of oxygen:
In the formula, the calculation coefficient is /
0(%)=k(=2×10
H The oxygen height measured when analyzing the sample, m
. The oxygen peak height obtained when analyzing the blank, m sample, E. The analysis result is expressed to three decimal places. The difference in the analysis results between laboratories should not be greater than the allowable range listed in the following table★
r. n15~.nar
2-U. JSO-D, D6 U
≥-0, 0G0~0, 090
>0. 090-0. 18
>0. 120~- 0. J50
Additional remarks:
This standard is sponsored by Gangzhou Iron and Steel Factory. This standard is sponsored by Jinzhou Iron and Steel Factory.
The main drafter of this standard is Mi Baoze
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