GOST 27981.0-88
GOST 27981.0−88 Copper of high purity. General requirements for methods of analysis
GOST 27981.0−88
Group B59
STATE STANDARD OF THE USSR
HIGH PURITY COPPER
General requirements for methods of analysis
Copper of high purity.
General requirements for methods of analysis
AXTU 1709
Valid from 01.01.1990
until 01.01.2000*
________________________________
* Expiration removed
Protocol N 7−95 Interstate Council
for standardization, Metrology and certification
(IUS N 11, 1995). — Note the manufacturer’s database.
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR
PERFORMERS:
B. M. Rogov, E. N. Gazalov, I. I. Lebed
2. APPROVED AND put INTO EFFECT by Decision of the USSR State Committee for standards from
3. The term of the first check — 1994
The frequency of inspection — 5 years
4. INTRODUCED FOR THE FIRST TIME
5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 12.0.004−79 |
2.17 |
| GOST 12.1.004−85 |
2.11, 2.16 |
| GOST 12.1.005−88 |
2.12 |
| GOST 12.1.007−76 |
2.12, 2.13 |
| GOST 12.1.010−76 |
2.11 |
| GOST 12.1.019−79 |
2.9 |
| GOST |
2.4 |
| GOST 12.2.032−78 |
2.3 |
| GOST 12.2.033−78 |
2.3 |
| GOST 12.3.002−75 |
2.17 |
| GOST 12.3.027−81 |
2.11 |
| GOST 12.4.009−83 |
2.16 |
| GOST 12.4.011−87 |
2.15 |
| GOST 12.4.021−75 |
2.2, 2.3, 2.9 |
| GOST 12.4.028−76 |
2.15 |
| GOST 12.4.029−76 |
2.15 |
| GOST 12.4.085−80 |
2.15 |
| GOST 12.4.103−83 |
2.15 |
| GOST 12.4.132−83 |
2.15 |
| GOST 546−88 |
1.1.1 |
| GOST 4212−76 |
1.1.6 |
| GOST 6709−72 |
1.1.7 |
| GOST 20010−74 |
2.15 |
| GOST 22306−77 |
1.1 |
| GOST 24104−88 |
1.1.4 |
| GOST 25086−87 |
1.1.10 |
| GOST 27025−86 |
1.1.5 |
| GOST 27654−88 |
2.15 |
This standard establishes General requirements for methods of analysis copper of high purity, safety requirements when performing analyses.
1. GENERAL REQUIREMENTS
1.1. General requirements for methods of analysis GOST 22306 with additions.
1.1.1. Selection and preparation of samples for chemical analysis according to GOST 546*.
______________
* On the territory of the Russian Federation GOST 546−2001. — Note the manufacturer’s database.
1.1.2. Mass fraction of impurities in high purity copper is determined by the batches, the number of which is specified in the specific standard on the method of analysis, but not less than two. Simultaneously with the analysis under the same conditions is carried out at least two control experiments for the amendment in the result of the determination, taking into account the content of impurities in the reagents, utensils, environment (air), with the exception of the emission-spectral method with photoelectric registration of spectrum.
1.1.3. For the results analysis be the arithmetic mean of results of parallel measurements, each of which is made of a separate hinge.
1.1.4. Sample analyze samples and materials used for sample preparation and comparison of standard solutions weighed with an accuracy according to GOST 24104*.
_______________
* On the territory of the Russian Federation GOST 24104−2001. — Note the manufacturer’s database.
1.1.5. Terms relating to the degree of heating of water (solution) and the duration of the operations — according to GOST 27025.
1.1.6. To prepare the standard solutions using metals with a mass fraction of main component not less than 99.9%, or oxides of metals, or nitrate, carbonate salt. Method of mortar preparation — according to GOST 4212 or in specific standards for the method of analysis.
1.1.7. For the preparation of solutions and tests used distilled water according to GOST 6709, further purified by distillation in quartz apparatus or by passing through an ionization column filled with cation exchange resin.
1.1.8. Substance content in solutions Express:
mass concentration, g/DM, mg/cm
, ág/cm
;
molar concentration — mol/DM, M.
Mass fraction of components in high purity copper Express a mass fraction, %.
1.1.9. When preparing solutions and conducting analyses after each addition of the reagent the solution was stirred.
1.1.10. Control of the correctness of the results of the analysis carried out on standard samples of composition of copper, or by additives in accordance with GOST 25086.
1.1.11. Conditions of measurement must be selected in accordance with the operational documentation used in the analysis devices and equipment.
1.1.12. Allowed to use other equipment, auxiliary devices, materials, utensils, reagents, subject to obtaining the metrological characteristics are not inferior to the specified in the standard methods of analysis.
2. SAFETY REQUIREMENTS WHEN PERFORMING ANALYSES
2.1. Placement and storage of chemicals and other substances used in the analyses and which are hazardous and harmful properties, and their use should be in accordance with normative-technical documentation.
2.2. Preparation of samples for analysis and the analysis (dissolution in acids, alkalis, etc.) associated with the release of toxic vapors or gases must be performed in fume cupboards or boxes equipped with local suction device according to GOST
2.3. Jobs to perform analyses must be organised in accordance with the requirements of GOST and GOST 12.2.032 12.2.033; laboratory premises equipped with ventilation systems according to GOST
2.4. All electrical installations and electrical equipment used in the laboratory to perform analyses, must meet the requirements of GOST
2.5. When performing analyses of high-purity copper is necessary to provide a separate room for placement data handling; equipment for spectral analysis; atomic absorption spectrophotometers; for the production of photographic works; works on sample preparation and sharpening of electrodes.
2.6. In areas where spectrographs, microphotometry, spectrometry and balances, cannot be used for work with chemicals to prevent corrosion of metal parts of the instrument and damaging the optical components.
2.7. Tripods spectrographs should have screens to protect against UV radiation, suction devices for removing from the air ozone, metal oxides, and carbon monoxide emitted in the sources of spectra excitation and harmful influence on an organism of workers.
2.8. The machine is used for grinding carbon electrodes must have a built-in exhaust air inlet to prevent the ingress of carbon dust in the air, in quantities exceeding maximum permissible concentration.
2.9. Space polarographic and spectral analyses should have a common supply and exhaust and local exhaust ventilation in accordance with the requirements of GOST
To prevent entering the working area of harmful substances emitted in the sources of spectra excitation and bad acting on the body working, and also for protection from electromagnetic radiation and prevent sunburn by ultraviolet rays, each a source of excitation spectra should be placed inside of the device, equipped with an integrated exhaust air intake in accordance with GOST 12.4.021 and protective screen according to GOST
2.10. Mercury is used in polarographic analysis, should be stored in hermetically closed thick-walled vessels under thrust. Allowed to store mercury in small quantities (1 kg) under a layer of water, paraffin oil, glycerin. When working with mercury it is not recommended to use utensils of thin glass.
For the collection of contaminated mercury to be the Bank with water and a tight fitting tube. Not allowed to pour mercury in sewer sinks.
2.11. Requirements when working with flammable and explosive gases (acetylene, propane-butane etc.) should correspond to GOST 12.3.027*, GOST 12.1.010 and GOST 12.1.004** and safety rules in the gas sector, approved by Glavgossviaznadzor.
______________
* On the territory of the Russian Federation GOST 12.3.027−2004;
** On the territory of the Russian Federation GOST 12.1.004−91, here and hereafter. — Note the manufacturer’s database.
2.12. When performing analysis of high purity copper in the workplace air can be harmful substances, the limit of permissible concentration (MPC) and hazard class listed in the table.
| The name of the substance | Hazard class according to GOST 12.1.007 |
Mac according to GOST 12.1.005, mg/m |
Nitrogen oxides (calculated as NO |
3 | 3 |
| Ammonia |
4 | 20 |
| The sulfur dioxide |
3 | 10 |
| Benzene |
2 | 5 |
| Hydrogen bromide |
3 | 2 |
| Hydrochloric acid |
2 | 5 |
| Acetic acid |
3 | 5 |
| Mercury metal |
1 | 0,01/0,005 |
| Butyl alcohol |
3 | 10 |
| Ethyl alcohol |
4 | 1000 |
| Toluene |
3 | 50 |
| Carbon monoxide |
4 | 20 |
| Carbon dust |
4 | 6 |
| Carbon tetrachloride |
2 | 20 |
| Chloroform |
2 | 10 |
| Alkali caustic (solutions in terms of NaOH) |
2 | 0,5 |
2.13. General requirements for control of content of harmful substances in working zone air GOST
Determination of concentrations of harmful substances according to methods approved by the USSR Ministry of health.
2.14. Disposal analysis is carried out in accordance with the rules of surface water protection from pollution by sewage, approved by the USSR Ministry of health.
2.15. All persons associated with the analysis of copper, must be provided with protective clothing, collective and individual means of protection according to GOST 12.4.011*, GOST 12.4.028 GOST 12.4.029, GOST 27654, 12.4.085 GOST, GOST 12.4.103, GOST 12.4.132, GOST 20010**.
______________
* On the territory of the Russian Federation GOST 12.4.011−89;
** On the territory of the Russian Federation GOST 20010−93. — Note the manufacturer’s database.
2.16. Laboratory facilities in which the work is performed in the analysis of high purity copper by different methods, blast, explosion and fire hazard, belong to the category of industries with flammable fluids, and fire safety requirements they need to meet the requirements of GOST
2.17. The organization of training working safety — according to GOST 12.0.004*.
______________
* On the territory of the Russian Federation GOST 12.0.004−90. — Note the manufacturer’s database.
Requirements to professional selection and testing of knowledge of employees — according to GOST
