GOST 12554.2-83
GOST 12554.2−83
INTERSTATE STANDARD
ALLOYS OF PLATINUM-RUTHENIUM
METHOD OF SPECTRAL ANALYSIS
Edition official
And PC PUBLISHING house of STANDARDS, Moscow
UDC 669.231'236:543.42:006.354 Group B59
INTERSTATE STANDARD
ALLOYS 11ЛАТИ BUT RUTEN AND EVE E
Method of spectral of analysis GOST
12554.2−83
Platinum-ruthcnium alloys.
Method of spcctral analysis
AXTU 1709
Date
This standard establishes a spectral method for the determination of impurities of palladium, gold, the lot. iron (at mass proportion of each from 0.01 to 0.10%), rhodium and iridium (at a mass proportion of each from 0.02 to 0.20%) in platano-ruthenium alloys.
The method is based on the translation of alloy into the globule (liquid drop of melt) and measuring the intensity of the impurity lines in the arc spectrum. Quantitative estimate of mass of contaminants dates set by calibration with standard samples.
1. GENERAL REQUIREMENTS
1.1. General requirements for method of analysis according to GOST 22864.
1.2. The numerical value of the result of the analysis must end with the digit the same category, and permissible differences.
(Added, Rev. No. I).
2. APPARATUS, REAGENTS AND SOLUTIONS
The large quartz spectrograph dispersion.
The three-stage attenuator.
Arc generator of alternating current.
Microphotometer.
Electrodes, carbon, made from coal spectralinehandy brand high purity-7.
The lathe table for sharpening carbon electrodes.
Standard samples of the enterprise.
Photographic plates of the spectral type II sensitivity of 10−15 conventional units.
The developer and fixer.
Hydrochloric acid according to GOST 3118, diluted 1:1.
(Changed edition, Rev. No. 1).
3. YEAR COOKING TO THE ANALYSIS
Samples for analysis must be in the form of tape, wire or shavings. To remove surface contamination samples before taking the sample is boiled in hydrochloric acid (1:1) for 2 min, washed with water and dried.
Official edition Reprinting is prohibited
★
© Standards publishing house. 1983 With IPK Publishing house of standards. 1999 Reissue with Amendments
GOST 12554.2−83 C. 2
The electrodes were applied to the spectral coals with a diameter of 6 mm. the Lower electrode is notched with millimeter depression in the end. In the recess is placed a sample to be analyzed or of standard sample with a mass of 0.10 g. For the upper electrodes used charcoal, sharpened to a hemisphere or a truncated cone with ground diameter of 1.5−2 mm.
(Changed edition, Rev. No. I).
4. ANALYSIS
Spectra photographed at slit width of the spectrograph is 0.02−0.03 mm and the coverage of her being through the condenser, exposure of 45−60 s, a current of 7−8 And at the position of the drum wavelength of 330 nm. The adjustment of the interelectrode gap of 2.5 mm is carried out continuously throughout the exposure for the image of the arc on the screen of the intermediate diaphragm.
A photographic plate showing for 4 min at developer temperature of 20 ° C. the Shown plate is rinsed in water, fixed, washed in running water, dried and photometric.
(Changed edition, Rev. No. 1).
5. PROCESSING OF THE RESULTS
5.1. Length of your analytical spectral lines is given in the table.
Define item |
Wavelength of lines of the designated element, nm | Item comparison |
The wavelength of the line semesa of sravnenia |
| Rhodium | 350.25 | Ruthenium | 345.29 |
| Palladium | 344.14 | The same | 345.29 |
| Iridium | 322.08 | * | 322.01 |
| Gold | 312.28 | 322.01 | |
| Iron | 296.69 | Platinum | 295.21 |
5.2. Determination of the mass fraction of the elements are by the method of «three standards* objective photoretrieval, calibration graphs are built for each analyzed element. Y-axis delay value difference pucherani lines of the designated element and the base, the abscissa shows values of the logarithm of mass fractions of standard samples.
With the help of calibration curve by the known values of the difference of pochernenija find the contents of the analyzed element in the sample.
5.3. The convergence of the method is characterized by a relative standard deviation equal to
0,15.
The final result of the analysis be the arithmetic mean of three parallel measurements under the condition of
(-^Shah „^min) ^ 3 Sr • X“ ,
where XPA — the greatest result of the parallel measurements;
XTP — the lowest result of the parallel measurements;
5 — relative standard deviation describing repeatability of measurements;
X» is the arithmetic mean computed from n measurements of the parallel (//=3).
C. 3 GOST 12554.2−83
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR the DEVELOPERS
A. A. Kuranov, G. S. Haak, N. S. Stepanov, N. D. Sergienko, T. I. Belyaeva
2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from
3. INSTEAD, GOST 12554−67, in part of sec. 3
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of NTD. referenced | Item number |
| GOST 3118−77 | Paw. 2 |
| GOST 22864−83 | 1.1 |
5. Limitation of actions taken by Protocol No. 3−93 Interstate Council for standardization, Metrology and certification (ICS 5−6-93)
6. The re-release (Feb 1999) with amendment no. I, approved in September 1988 (IUS 1−89)
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