GB/T 5070.7-2002 Chemical analysis methods for magnesia-chromium refractories Part 7: EDTA volumetric method for determination of calcium oxide content GB/T5070.7-2002 standard download decompression password: www.bzxz.net

ICS 1. 55
National Standard of the People's Republic of China
CB/5070.1~5070.12—2002
547.1~070.1015
Chemical analysis of magnesia chromite refractories
Chcmieal analysis of magnesia chromite refractories2002.1231Promulgated
People's Republic of China
General Administration of Quality Supervision, Inspection and Quarantine
Implementation on 2003-06-01
RCS 81.080
National Standard of the People's Republic of China
GB/T5070.7—2002
Chemical analysis of magnesia chromite refractories
Part 7: Determination of calcium oxide content by EDTA volumetric methodChemical analysis of magnesia chrunite refractories-Part 7:Dctermination of calcium oxide-EDTA volumetric method2002-12-31 Issued by the People's Republic of China National Quality Supervision and Inspection Commission 2003-06-01 Implementation GB/1 5070.7—2002
B The methods for chemical analysis of chromium-containing materials are as follows: Part 1: Determination of the amount of chromium by calcination; Part 2: Determination of the amount of chromium oxide by blue light spectrophotometry; Part 3: Determination of the amount of chromium oxide by atomic absorption spectroscopy; Part 4: Determination of the amount of chromium oxide by KTA method; Part 5: Determination of the amount of chromium oxide by D4 method; Part 6: Determination of the amount of chromium oxide by ELT method; Part 7: Determination of the amount of chromium oxide by slow calcination method; Part 8: Determination of the amount of chromium oxide by ELT method; Part 9: Determination of the amount of chromium oxide by slow calcination method; Part 10: Determination of the amount of chromium oxide by atomic absorption spectroscopy; Part 11: Determination of the amount of chromium oxide by sieving; Part 12: Determination of the amount of chromium oxide by atomic absorption spectroscopy; Part 13: Determination of the amount of chromium oxide by atomic absorption spectroscopy; Part 14: Determination of the amount of chromium oxide by atomic absorption spectroscopy. This part is part 7 of CB/5673. This part is a new method for the determination of chemical contaminants by the flow method using the indicator E. coli. Part B/1.1 Guidelines for standardization of control products Part 1: Structure and writing rules of standards and B2UJ1.4213 Rules for writing standards Part 1: Standardization of chemical analysis methods Appendix A of this part is a normative annex.
Part of the Beijing Metallurgical Industry Bureau proposed
The six departments issued the National Refractory Standardization Technical Committee (S1) This part is the starting unit: Hong Kong Refractory Research Institute, Ma Jiexin Iron Co., Ltd.!. Division Yue Caoren, Education, Department of American Type Jian.
1 Standard
Chemical analysis method for magnesium-chromium refractory materials
Part 1: EIIA volumetric method for determining the amount of calcium carbonate G/T570 This part specifies the method for determining the amount of calcium carbonate by FDTA volumetric method, GR/T5070.7-200 2
This part is for the determination of the main calcium content in refractory materials with magnesium chromium content. The specified range (quantity distribution) is C, 5% 15, M2 Normative references
The clauses in the following documents are incorporated into the clauses of this part by reference to the wood part of the ... Part, the bottom of the new version of the withdrawal of the middle part,
GH/1C76.12202 Iron quality pyrotechnic materials chemical analysis of gram method Part 1: Year method for determination of ignition magnetic flux density B: I7 times the number of times
(13/T16325 Shaped fire products push sample collection rules GB/T12835 Laboratory version of the glass collection end full fixed tube (TS/T12835 fast fast bottle compilation instrument single mark line discarded volume application (11/12813 Laboratory glass collection instrument exposed single mark line pipette B/Work 1761 large gland material and non-shaped thorn 3. Refractory material sample preparation principle
test Y with lack of driving agent - zirconium acid standard reagent rate melt, static acid pan, with ethanol reduction high price road with hexamethylammonium amine separation iron, evaluation, shovel, etc., collect part of the filtrate H-alcohol glue commercial ten pillow home, add chemical test tour H1, with calcium indicator, with EDTA standard end determination of calcium oxide 4 reagents and collection
4. Mix the reagent: take one part without technical building age and one part as finely grind, mix well, 4.2 potassium hydroxide solution (3/[.1 dong) and store in the whole material bottle 4.3 six times In the middle of the four limbs of the Cg:
4.4 tetramine (16R1.
4.5 chain hydroxide solution (1/) tablets in a bottle 4.6 hydrochloric acid 11),
4.7 hydrochloric acid 2-8.
4.8 oxidizing agent! g1) take out -g of oxidizing agent (.% quickly add a small amount of water droplets 1m acid (4.6) add water to the solution, dilute to 1 ".
1 Xiaolin solution (1 + 13)
4.11 oxidizing agent solution e-.m .1
Take 233ml of calcium ferromagnetic acid (99.99%) which has been previously dried at 111°C and cooled to room temperature. Add a small amount of water to the solution in GB/15070.7-2002
U. Slowly add 4% iodine. Heat to boil and cool to room temperature. Transfer to a 100ml bottle and dilute with water. Dilution: 4.12 EYTA standard preparation: LFDTA (-0.01ml = 1/L): 4.12.1 Prepare monosodium diamine acid (FDTA) 3.72 in a beaker, heat to dissolve, cool, dilute with water to 1:1:4.12.2 Calibration
Use 3 drops of 25.00 ml calcium hydroxide solution (411) in a beaker, add 1 ml of each solution, 3 drops of 1% alcohol (4.8) water (about 25 ml), add 5 ml of ethyl acetate (4.10>, stir, add 30 ml of sodium carbonate solution (4.5) and a small amount of indicator (1.12>: titrate with A standard titration solution (4.2) until the solution changes from 1:1 to 1:1. End point: When the difference between the standard titration limit of EA and the actual average volume V is found, then the unit is milliliters (mL): V. Calculate the volume of the EIA standard non-titration solution (1.11) in ml/s according to the formula (1):
calcium carbonate based suspension (.11) - the volume of the standard solution (1.11) taken out. The unit is milliliters (mL): V. ——Titrate 1 chemical oxidation induced by the ED2A cup standard solution (4.12) square and volume of the estimated, single this is the toxic l
English system cloud to the effective rate,
4.13 special test sheet:
4.14 calcium indicator: you take 1 calcium indicator: or calcium test bottle (or calcium acid plate) 5 in 1C5 (--110 under the supply of chlorine needs about 4.15 Bag transfer K! 128 station A class
4.16 Elimination of B/128054 class,
4.17 Container: GR/112H664 class,
5.1 Sampling steps
(5/" [25 years GE: 17617 sampling laboratory details, 5.2 Sample preparation
press T/T 537.! 202-5.2 Test: 6 points. 6.1 Number of determinations: 6.2 Sample quantity: 20g on the scale. 333g+ 6.3 Blank test: 333g+ 6.4 Verification test: 6.5 Determination: GB/T 44. 5070.7—2002
6.5.1 Place the material in a beaker containing 3~4+ mixed flux 4.1), mix again with 1% mixed flux 4.1]. Place the mixture in a flask and heat to 100~10% heat. Rinse for 5min-0min, remove and transfer, and evenly rinse the mixture. Cool. 6.5.2 Place the mixture in a beaker containing 4.53ml water and cover with 1% heat. Heat the mixture to remove the residue, add 4.7ml of hot dilute salt, add 2% ethanol (4.5> 51ml-1). Cool to room temperature and 5.7ml of liquid as required.13) Use hydrogen peroxide (4.2 g and no acid (Congo red test paper turns purple) to show excess red (about 5 μg/ml) in
6.5.4 Hydroxide precipitation reduction with medium speed fixed paper to make the filter with hot medium base four change through liquid (1.1 wash beaker 23 times. Sedimentation 5-6 times, filter with 0l. Discard limit acceptance:
6.5.5 hit the liter paper to stick it on the dry standard burning, with 10 mountain benefits (.6) will be the second precipitation rate with hot dilute stock (, 7 will forget the paper to select! Clean, water dilute light car generation of the accumulation of part I. Yu appearance Buddha, remove, cool room bottle, 6.5.6 hydrogenation welcome wave (=.?) and most of the age, then six times the medium base west dark liquid! 4.3> to the anti-production, excess 11.4 medicine moisturizing www.bzxz.net
6.5.7 generation of continuous filter people filter, wash, times method liquid And, cooled to room temperature, the water was diluted immediately, according to the ditch, the liquid was ignited and K (nuclear test effect can be provided for calcium, detailed analysis)
6.5.8 months I liquid parts (4.5 more than 1, J3 test solution H tr: 1. Add ice to the beaker to 5ml, add 5ml. Triethyl send: 1.10, then add hydroxide solution (1.) change less calcium indicator () ETA standard bag (412 two fixed until the test color is blue, which is the end point. Calculation of the analysis results
1 benefit chemical equal dosage (calculation, numerical representation. Technology (2 calculation: 1333JM10
ucao)_,
Qi Zhong:
—— The product of the titration rate of the standard solution is V. The titration rate of the standard solution is EYTA (4.2). The standard concentration is determined by the volume of the sample in grams per liter (m). The unit of the effective value is [μl]M (). The unit of the effective value is g/ml (g1m1.M=E.791: - The unit of the effective value is g). 7.2 The effective value must be obtained only when the analysis is consistent with the standard value. When the analysis is not consistent with the standard value, the sample will be analyzed and the effective value will be calculated. 7.3 When the two samples have the same effective value, the effective value will be expanded. Not in the table, the specified time is allowed. The total average value is used as the final analysis. Otherwise, the result of the A-level analysis is recorded with additional points and the period of treatment. 7.4 The result should be rounded to the required decimal place according to 5T817. If the supplier has requirements or relevant environmental standards, the number of decimal places should be controlled.
8 Tolerance
Under the condition of complex properties, the red grain stem must be tested again to verify the large dryness in Table 1. 45
CB/T5070.7—2002
High chemical tooth reputation (quality score)
:.01-.3.co
3.01--10. 03
Quality Certification and Control
9.1 According to 5.1, the certification test shall be carried out.
9.2 In particular, the flow rate shall be recalibrated every two months. If the temperature changes by more than 10 hours within one month, it shall be recalibrated in time.
10-year test report
The test report shall at least include the following contents:
． Commissioning unit:
Test group name:
Analysis results:
Used standard (T5070.72002)
Differences from specified analysis steps (if necessary): Abnormal phenomena observed in the test (if necessary!): During the test period,
implemented, the range of x
Y=U, *2.A.*,214x
table, filled in the method room,
improved treatment x
(normative record)
Acceptance analysis value procedure
1, 42..tx
sample* 2:1. 21
GB/T 5070.7—2002
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