GOST 12564.2-83
GOST 12564.2−83 Alloys gold-palladium-platinum. Method of spectral analysis (with Change No. 1)
GOST 12564.2−83
Group B59
STATE STANDARD OF THE USSR
ALLOYS GOLD-PALLADIUM-PLATINUM
Method of spectral analysis
Aurrum-palladium-platinum alloys.
Method of spectral analysis
AXTU 1709*
______________
* Changed the wording, Rev. N 1.
Valid from 01.07.84
to 01.07.89*
_______________________________
* Expiration removed by Protocol No. 3−93
The interstate Council for standardization,
Metrology and certification (ICS No. 5/6, 1993). -
Note the manufacturer’s database.
DEVELOPED by the Ministry of nonferrous metallurgy of the USSR
PERFORMERS
A. A. Kuranov, G. S. HAK, N. With. Stepanova, N. D. Sergienko, T. I. Belyaev, E. E. Safonova
INTRODUCED by the Ministry of nonferrous metallurgy of the USSR
Member Of The Board Of A. P. Snurnikov
APPROVED AND promulgated by the Decree of the State Committee USSR on standards on March 25, 1983 N 1374
REPLACE GOST 12564−67 in part of sec. 5
The Change N 1, approved and put into effect by the Decree of the USSR State Committee for standards from
Change No. 1 made by the manufacturer of the database in the text IUS N 1, 1989
This standard specifies a method of determining the spectral impurities iridium, rhodium, iron and lead into gold-palladium-platinum alloys (in mass fraction of iridium, rhodium, from 0.01 to 0.20% each of iron from 0.01 to 0.10%, and lead from 0.001 to 0.016%).
The method is based on the translation of the sample material in the globule (liquid drop of melt) and measuring the intensity of the impurity lines in the arc spectrum. Quantification of the mass fraction of impurities is set by calibration with standard samples.
1. GENERAL REQUIREMENTS
1.1. General requirements for methods of analysis GOST 22864−83.
(Changed edition, Rev. N 1).
1.2. The result of the analysis should end with the figure of the same category, and permissible differences.
(Added, Rev. N 1).
2. APPARATUS, REAGENTS AND SOLUTIONS
The large quartz spectrograph dispersion.
The three-stage attenuator.
Arc generator of alternating current.
Microphotometer.
Standard samples of the enterprise.
Electrodes, carbon, made from coal spectralinehandy brand high purity-7.
Machine bench lathe for grinding carbon electrodes.
Stopwatch.
Photographic plates of the spectral type II sensitivity of 10−15 conventional units.
The developer and fixer.
Hydrochloric acid by the GOST 3118−77, diluted 1:1.
(Changed edition, Rev. N 1).
3. PREPARATION FOR ASSAY
Samples for analysis must be in the form of tape, wire or shavings. To remove surface contamination samples before taking the test portions are boiled in hydrochloric acid (1:1) for 2 min, washed with water and dried.
The electrodes were applied to the spectral coals with a diameter of 6 mm. the Lower electrode is notched with millimeter recess in the end face, in which is placed the sample to be analyzed or of standard sample mass of 0.10 g, the upper electrode is a carbon rod sharpened to a hemisphere or a truncated cone with ground diameter of 1.5−2 mm.
(Changed edition, Rev. N 1).
4. ANALYSIS
Spectra photographed at slit width of the spectrograph 0,020−0,025 mm, exposure 40−60 with a current of 6A through a three-stage attenuator. The distance between electrodes 2.5 mm is adjusted during the exposure on the intermediate diaphragm. Drum wavelength set at 295 nm.
For each standard and test sample receive three concurrent spectrogram.
A photographic plate at the temperature shown developer of 18−20 °C for 3 min (type II). Shown photographic plate is then rinsed with water, fixed, washed in running water, dried and photometric.
(Changed edition, Rev. N 1).
5. PROCESSING OF THE RESULTS
5.1. Wavelength of analytical spectral lines is given in the table.
| The designated element |
Wavelength of lines of the designated element, nm |
Element comparison |
The wavelength of the line item comparisons, nm |
| Iridium |
313,33 |
Gold |
319,47 |
| Rhodium |
339,68 |
The same |
319,47 |
| Iron |
259,34 |
« |
259,00 |
| « |
259,94 |
« |
268,87 |
| Lead |
280,20 |
« |
268,87 |
5.2. Determination of the mass fraction of the elements are by the method of «three standards» with the objective photoretrieval. The calibration graphs are built for each analyzed element. Y-axis delay value difference pucherani lines and determined the main element, and the abscissa shows the 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 the relative standard deviation of 0.15.
The final result of the analysis be the arithmetic mean of three parallel measurements under the condition of:
where is the best results of parallel measurements;
least the result of the parallel definitions;
— relative standard deviation describing repeatability of measurements;
— the arithmetic mean calculated from
parallel measurements (
3).
The electronic text of the document
prepared by JSC «Code» and checked by:
the official publication of the
Alloys gold-palladium-platinum.
Methods of analysis. GOST 12564.1−83,
GOST 12564.2−83: SB. Standards. -
M.: Publishing house of standards, 1983
