This standard specifies the determination of manganese content by sodium periodate spectrophotometry. This standard is applicable to the determination of manganese content in silicon-aluminum alloys and silicon-barium-aluminum alloys. The determination range is 0.10% (m/m)~0.50% (m/m). YB/T 178.4-2000 Chemical analysis method for silicon-aluminum alloys and silicon-barium-aluminum alloys Determination of manganese content by sodium periodate spectrophotometry YB/T178.4-2000 Standard download decompression password: www.bzxz.net

￥R/T179 4--2000
is a kind of high-efficiency aluminum alloy and silicon alloy. It is a new product with high load performance. In order to match the standard of the same product, the industry standard has been established before. The standard has been fully tested in the process, and the release of the sample, the oxidizing medium, the oxidation stage, the selection of the reducing agent, etc. have been studied. In addition, the YBT178 aluminum alloy has been specified in the overall chemical method. This standard includes the following items: 1. The standard applies to the following items: 2. The standard applies to the following items: 3. The standard applies to the following items: 4. The standard applies to the following items: 5. The standard applies to the following items: 6. The standard applies to the following items: 7. The standard applies to the following items: 8. The standard applies to the following items: 9. The standard applies to the following items: 10. The standard applies to the following items: 11. The standard applies to the following items: 12. The standard applies to the following items: 13. The standard applies to the following items: 14. The standard applies to the following items: 15. The standard applies to the following items: 16. The standard applies to the following items: 17. The standard applies to the following items: 18. The standard applies to the following items: 19. The standard applies to the following items: 20. The standard applies to the following items: 21. The standard applies to the following items: 22. The standard applies to the following items: 23. The standard applies to the following items: 24. The standard applies to the following items: 25. The standard applies to the following items: 26. The standard applies to the following items: 27. This standard specifies the standard for the determination of indigoferous metal content in zinc oxide and zinc oxide. ... GB/T1-1994 Preparation and analysis of gold-embedded samples 3 Methods
Use nitric acid and oxygen to make an acid solution, mix with iodine to remove the carrier, and use sodium iodate to precipitate manganese dioxide in a phosphoric acid medium to form a purple-red high-salt solution, which absorbs at 1\% of the wavelength. 4 Reagents and materials
Except for the instructions in the analysis, no analytical reagents approved by the manufacturer shall be distilled water or water of appropriate concentration. 41 (1.2 mL
4.2 %—J. s.mi..
4.3 and acid a-1.x
4.z limit -1.70.
4.5 Periodic acid two drops of liquid (0/weigh the solution to make the solution, can be 230 night cup, such as 20ml water. Acid resistance (1.17. Warm solution, cold part, use water to release dust 1. About: 2.6 non-quality warm solution 1081.).
. Does not contain reducing substances water, no0 shaped bottle into 1oc distilled water,! . touch acid. 4 series mature Buddha add 21. high supply sodium micro: 1 pool method heat temptation clock iamia take down the cold temperature. 2.6 catch standard capacity epidemic
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month alliance 5: report set Kai solution certificate / with, hot surface oxidation certificate wear out, use the National Metallurgical Industry Bureau 2000-07-26 approved Gnk
20001201 implementation
VR:T178.4-200
water washing sequence, then with: water / swim wash three times desire · white ten smoke, save two dry deep embed. 4.8.2 manganese standard drop solution preparation
take 0.3000 oxygen channel (1.4.12. Deng in 250 bad, add 15ml, nitric acid door +1>. heat the whole solution, drive out all the money emulsion. Cool to room temperature, transfer to 1000n volumetric root, dilute with water to several times, and pour in. Dissolve 1.0 ml, containing 20.0 mM manganese. 5 Apparatus and equipment
In the analysis, use the normal laboratory apparatus, set up: 6. Take samples
Prepare samples according to the provisions of 4010. The test column should be sieved through 3.121mr. The sample should be kept in a dry place.
Analysis steps
Safety instructions: In the presence of nitrogen and organic matter, the smoke of oxygen may ignite. Hydrogen and oxygen can seriously ignite the body quickly, so safety precautions should be taken when using
Take the sample accurately below 1,001.
7.2 Air test
Make a test sample at any time
7.3 Set the test sample to wwW.bzxz.Net
31 No need for frequent or deep penetration, slowly enter the destruction (: 35% oxygen acid (. Low heat and stir until the test smoke turns red, continue to test the full report. Shenzhen people 1.4 low heat acid to nearly heat, cool, add 1m nitric acid (1.) 1 large boiling solution. Cool, put the test solution into 253mL of the cabinet. Third, close the test filter port and pass the wave. 7.3. ? Plan 5ml Xue limit, 4.4, 0ml palace bake full (.5 water range before the volume is 6ml, keep the micro-extraction at 31nin. Cool the agent to room temperature, transfer [through and bottle, do not contain or save water (4.? Meal group pull scale, leak 7.3-3 will part of the color solution.3.2 transfer to the blood when the thickness is absorbed. Dry agent guest liquid through shaking side commercial non-nitrogen sales range (4.6! Car purple shrimp .3.4 Place the sample on the test point to see the absorbance of the light-sensitive test wave, and put it on the card to get the virtual music. 7.3.5 The method of the residual curve is
Graduation U1.(0.2.,3.0)4..5.00t The standard control liquid 1.8.2) is put into a 25-dimensional bottle with a 2m single (4.1!.m. The following is divided into 73. Type soft work: Take the test as the teaching and measure the absorbance of the meter at 5m. Take the manganese mouth as the horizontal coordinate and the absorbance cell as the vertical coordinate to draw the calibration line. 8 Calculation of analysis results
Formula for calculating the quality component
Mut: -
Where: —— The test result obtained on the previous calibration
The new result is expressed to two decimal places, 9 Allowable
YA/T178.4—2000
The difference between the two independent analysis results should not be greater than the allowable margin listed in Table 1, Table 1
c, 13~n, 5
22. 252. 35
10 Test report
The test report should include the following contents
a) Information on the test materials, laboratories and branches; b) Columns specified in the technical standards; e) Analytical results and batch expression;
Anomalous phenomena observed during the determination;
|Any operations that may be helpful in interpreting the analysis results. This standard does not cover any necessary or unauthorized operations. G7C
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