GOST 16274.0-77
GOST 16274.0−77 Bismuth. General requirements for methods of analysis (with Amendments No. 1, 2, 3, 4)
GOST 16274.0−77
Group B59
STATE STANDARD OF THE USSR
BISMUTH
General requirements for methods of analysis
Bismuth.
General requirements for methods of analysis
AXTU 1709
Date of introduction 1978−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of nonferrous metallurgy of the USSR
DEVELOPERS
PS Poklonsky, F. M. Manji, G. V. Khabarova
2. APPROVED AND promulgated by the DECREE of the State Committee of standards of Ministerial Council of the USSR from
3. The frequency of inspection 5 years
4. REPLACE GOST 16274.0−70
5. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 12.0.004−90 |
12.9 |
| GOST 12.1.004−91 |
12.3.1 |
| GOST 12.1.005−88 |
12.2.2; 12.6.2 |
| GOST 12.1.007−76 |
12.2.2; 12.6.2 |
| GOST 12.1.018−93 |
12.10.7 |
| GOST 12.1.030−81 |
12.5.3 |
| GOST |
12.5.3 |
| GOST 12.4.013−85 |
12.10.2 |
| GOST 12.4.009−83 |
12.3.2 |
| GOST 12.4.021−75 |
12.2.1 |
| GOST 12.4.028−76 |
12.10.3 |
| GOST 10928−90 |
1.1.1 |
| GOST 22306−77 |
1.1 |
| GOST 25086−87 |
1.1 |
| TU 48.6−114−89 |
1.1.1 |
6. Resolution of the state standard from
7. REPRINT (July 1997) with Amendments No. 1, 2, 3, 4, approved in January 1983, November 1983, June 1987, July 1992 (IUS 5−83, 2−84, 11−87, 10−92)
1. GENERAL REQUIREMENTS
1.1. General requirements for methods of analysis bismuth brands Vi2, Vi1 — GOST 25086, brands Vi00, Ви000 and Ви0000 — GOST 22306 with additions.
(Changed edition, Rev. N 3, 4).
1.1.1. Sampling of bismuth brands Vi2, Vi1 and Vi00 according to GOST 10928, brands Ви000 and Ви0000 — on the other 48−6-114.
(Changed edition, Rev. N 4).
1.1.2. Weighing is carried out on the analytical balance with a weighing error of no more than 0.0002 g and a torsion balance with a weighing error of no more than 0.001 g.
1.1.3. The concentration of impurities and all operations for the preparation of samples comparisons and sample preparation in the analysis of bismuth brands Ви0000, Ви000 and Vi00 spend in the pits, made of organic glass.
(Changed edition, Rev. N 3, 4).
1.1.4. Discrepancies in the results of two parallel definitions and results from both analyses are calculated with the confidence probability of 0.95, should not exceed the values specified in the appropriate table of standards.
Numerical values of the results of the analysis Express the number with the last digit of the same rank as that of the numerical values of permissible differences.
1.1.5. Control of correctness of the analysis is carried out by additives at least once a month, and each replacement of reagents and solutions, after long interruptions and other changes that affect the result of the analysis.
Supplements choose the value closest to the mass fraction of impurities in the sample. The value found Supplement, is calculated as the difference between the contents of the designated component in the sample with addition and the result of the analysis of the sample without additives. The result of the analysis is considered correct if the detected value differs from the additive input of not more than
on 
,
on 
,
where and
— the permissible discrepancy between the results of parallel measurements in the sample and the sample with the additive.
1.1.4,
1.1.6. (Deleted, Rev. N 4).
5−11*. (Deleted, Rev. N 2).
____________
* Numbering corresponds to the original. — Note the manufacturer’s database.
12. SAFETY REQUIREMENTS
12.1. Requirements analysis
In the determination of impurities in bismuth metal used in volumetric, colorimetric, polarographic, and chemical-spectral and spectral methods of analysis.
12.2. Requirements for premises
12.2.1. Laboratory areas in which analyses are performed, including space, where sampled and the study sample must be equipped with exhaust ventilation in accordance with the requirements of GOST
12.2.2. Temperature, humidity, velocity of air and the content of harmful substances in the air of the working area of laboratory areas by GOST 12.1.005 and GOST
12.2.2. The analytical laboratory should be equipped with a heating furnace with ventilation cabinets, running water, sanitation, desks, linoleum and other kiotosusimi surfaces, the necessary chemical glassware.
12.2.2 b. The area of the premises for the placement of the spectrographs should be not less than 15 mbased on one existing installation for carrying out photometric work — not less than 16 m
, photographs — not less than 8 m
, for sample preparation and coal — not less than 20 m
.
12.2.2 Flooring in all rooms that contain equipment with electric equipment (spectrographs, etc.), should be made of wood and covered with linoleum.
Allowed concrete floors with linoleum coating. Sections of the floor in workplaces about these devices should be covered with rubber mats.
12.2.2 a-12.2.2 V. (Introduced later, Rev. N 3).
12.3. Fire safety requirements
12.3.1. Fire safety requirements of laboratory facilities — according to GOST
12.3.2. The types of fire fighting equipment and extinguishing media — according to GOST
12.4. Requirements for placement of equipment
12.4.1. (Deleted, Rev. N 3).
12.4.2. It is necessary to provide a separate room for the placement of the spectrographs, take photographs, work on the preparation of coal samples.
12.4.3. In the room, which is located spectrographs are not allowed to work with chemicals to prevent corrosion of metal parts of the instrument and damaging the optical components.
12.4.4. Analytical balances must be installed in a separate room.
12.4.5. (Deleted, Rev. N 3).
12.4.6. All installations must be placed at a distance of not less than 1.5 m from each other.
12.4.7. The data handling and devices containing mercury must be placed in a separate room, isolated from other work areas.
12.4.8. The equipment space laboratory, designed to work with mercury should correspond to requirements of sanitary rules of design, equipment, operation, and maintenance of production and laboratory premises, intended for work with mercury, its compounds and devices with mercury filling, approved by the USSR Ministry of health.
12.5. Rules electrical safety
12.5.1. All work in the chemical laboratory should be carried out in the presence of intact electrical equipment.
12.5.2. Electrical appliances must conform to the rules of arrangement of electrical installations, approved by Gosenergonadzor.
12.5.3. All appliances should be equipped with devices for grounding — according to GOST
12.5.4.
12.6. The requirements to the initial materials and reagents
12.6.1. (Deleted, Rev. N 3).
12.6.2. Control of content of harmful substances in the air of the working zone of production areas should be carried out according to GOST 12.1.007 and GOST
12.6.3. Analysis of air samples for the content of harmful substances in the air of working zone is performed according to the methods of determination of harmful substances in the air, approved by the Ministry of health of the USSR.
12.7. Requirements for storage and transportation of raw materials and reagents
12.7.1. (Deleted, Rev. N 3).
12.7.2. Chemicals should be stored in specifically designed for each substance place in closed cans, jars or other vessels. Each vessel should be attached label with the exact name of the substance and its characteristics (concentration, specific gravity, purity, etc.).
Bottles of acids (hydrochloric, nitric) should be kept in proper cages or crates. Transfer them you should only two or transported on a special trolley. Flask with acids and alkalis should be transferred only in special wooden boxes or iron, lined with asbestos.
Acids and alkalis must be stored in cabinets under the hood or in specially equipped ventilating cabinets.
12.7.3. Mercury should be stored in sealed thick containers under traction. Allowed to store mercury in small quantities (1 kg) under a layer of water, paraffin oil, glycerin.
12.8. Requirements for the method of disposal, removal and disposal of reagents
12.8.1. Waste acid and alkali after neutralization must be received in special sumps that prevent ingress of harmful substances into soil and waterways. Spilled acids and alkalis should be treated with sand, to neutralize and then conduct the cleaning.
12.8.2. For the collection of contaminated mercury to be used in Bank with water, closed with a rubber stopper. Not allowed to pour mercury in sewer sinks. For demercurization premises floors and walls should be rinsed in a 3% solution of potassium permanganate acidified with hydrochloric acid or 20% aqueous solution of ferric chloride. After demercurization in the room should be the analysis of the air environment for the presence of mercury.
12.9. To work in chemical and spectral lab allowed a person trained in safety rules in laboratories according to GOST
12.10. Apply remedies employed
12.10.1. Working in the lab are provided with special uniform, special footwear and means of individual protection in accordance with typical industry norms of free issue of workwear, footwear and protective equipment to workers and employees, approved by the USSR State Committee for labour and social Affairs.
(Changed edition, Rev. N 3).
12.10.2. To protect the eyes from UV radiation when working with a radiation source (arc, spark), you must use protective goggles with light filters according to GOST 12.4.013*.
_______________
* On the territory of the Russian Federation GOST
12.10.3. For protection of respiratory organs working at sharpening carbon electrodes and preparing samples for analysis, you must use a respirator type «Petal» SWISS-1 according to GOST
12.10.4. On the tables, equipped with spectrographs, should be provided space for free positioning of devices for photographing the spectra (the tripods with the electrodes and the samples, time relay, etc.). It is prohibited in workplaces to accommodate foreign objects.
12.10.5. The electric excitation source (arc) must be shielded and covered with a protective grounded housing is provided with local suction device to remove from the air ozone, oxides of metals, oxides of carbon and other harmful compounds emitted in the sources of spectra excitation and bad acting on the body working.
12.10.6. A device for sharpening carbon electrodes must be equipped with a local extraction device for removal of carbonaceous dust.
12.10.7. For protection from static electricity generated while working with the generators of the arc, it is necessary to fulfill the requirements of GOST 12.1.018, providing grounds according to claim 2.5.3, and in the process, to close the ends of the carbon electrodes in the intervals between the spectra exhibiting the arcing.
12.1−12.10.7. (Added, Rev. N 1).
12.11, 12.11.1−12.11.7. (Deleted, Rev. N 3).
